UI/UX solution:

fix POST booking request

.kotlin/errors/errors-1764426177224.log

@@ -0,0 +1,76 @@
+kotlin version: 2.0.21
+error message: org.jetbrains.kotlin.util.FileAnalysisException: While analysing C:/Users/Admin/AndroidStudioProjects/NTO-2025-Android-TeamTask/app/src/main/java/ru/myitschool/work/App.kt:7:5: java.lang.IllegalArgumentException: source must not be null
+	at org.jetbrains.kotlin.util.AnalysisExceptionsKt.wrapIntoFileAnalysisExceptionIfNeeded(AnalysisExceptions.kt:57)
+	at org.jetbrains.kotlin.fir.FirCliExceptionHandler.handleExceptionOnFileAnalysis(Utils.kt:249)
+	at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:46)
+	at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.resolveAndCheckFir(firUtils.kt:77)
+	at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.buildResolveAndCheckFirViaLightTree(firUtils.kt:88)
+	at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModuleToAnalyzedFir(jvmCompilerPipeline.kt:319)
+	at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModulesUsingFrontendIrAndLightTree(jvmCompilerPipeline.kt:118)
+	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:148)
+	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:43)
+	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:103)
+	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:49)
+	at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
+	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:464)
+	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:73)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.doCompile(IncrementalCompilerRunner.kt:506)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:423)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileNonIncrementally(IncrementalCompilerRunner.kt:301)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:129)
+	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:675)
+	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:92)
+	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1660)
+	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
+	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
+	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
+	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport.serviceCall(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source)
+	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
+	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
+	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
+	at java.base/java.lang.Thread.run(Unknown Source)
+Caused by: java.lang.IllegalArgumentException: source must not be null
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.requireNotNull(KtDiagnosticReportHelpers.kt:68)
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn(KtDiagnosticReportHelpers.kt:39)
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn$default(KtDiagnosticReportHelpers.kt:31)
+	at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkSourceElement(FirIncompatibleClassExpressionChecker.kt:50)
+	at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkType$checkers(FirIncompatibleClassExpressionChecker.kt:42)
+	at org.jetbrains.kotlin.fir.analysis.checkers.type.FirIncompatibleClassTypeChecker.check(FirIncompatibleClassTypeChecker.kt:17)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.check(TypeCheckersDiagnosticComponent.kt:81)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:53)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:19)
+	at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
+	at org.jetbrains.kotlin.fir.analysis.collectors.CheckerRunningDiagnosticCollectorVisitor.checkElement(CheckerRunningDiagnosticCollectorVisitor.kt:24)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:248)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirSimpleFunctionImpl.acceptChildren(FirSimpleFunctionImpl.kt:63)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:118)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirSimpleFunction.accept(FirSimpleFunction.kt:51)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirRegularClassImpl.acceptChildren(FirRegularClassImpl.kt:63)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitClassAndChildren(AbstractDiagnosticCollectorVisitor.kt:87)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:92)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirRegularClass.accept(FirRegularClass.kt:48)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirFileImpl.acceptChildren(FirFileImpl.kt:57)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:1151)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirFile.accept(FirFile.kt:42)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollector.collectDiagnostics(AbstractDiagnosticCollector.kt:36)
+	at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:34)
+	... 33 more
+
+

.kotlin/errors/errors-1764509512206.log

@@ -0,0 +1,76 @@
+kotlin version: 2.0.21
+error message: org.jetbrains.kotlin.util.FileAnalysisException: While analysing C:/Users/Admin/AndroidStudioProjects/NTO-2025-Android-TeamTask/app/src/main/java/ru/myitschool/work/App.kt:7:5: java.lang.IllegalArgumentException: source must not be null
+	at org.jetbrains.kotlin.util.AnalysisExceptionsKt.wrapIntoFileAnalysisExceptionIfNeeded(AnalysisExceptions.kt:57)
+	at org.jetbrains.kotlin.fir.FirCliExceptionHandler.handleExceptionOnFileAnalysis(Utils.kt:249)
+	at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:46)
+	at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.resolveAndCheckFir(firUtils.kt:77)
+	at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.buildResolveAndCheckFirViaLightTree(firUtils.kt:88)
+	at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModuleToAnalyzedFir(jvmCompilerPipeline.kt:319)
+	at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModulesUsingFrontendIrAndLightTree(jvmCompilerPipeline.kt:118)
+	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:148)
+	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:43)
+	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:103)
+	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:49)
+	at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
+	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:464)
+	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:73)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.doCompile(IncrementalCompilerRunner.kt:506)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:423)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileNonIncrementally(IncrementalCompilerRunner.kt:301)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:129)
+	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:675)
+	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:92)
+	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1660)
+	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
+	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
+	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
+	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport.serviceCall(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source)
+	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
+	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
+	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
+	at java.base/java.lang.Thread.run(Unknown Source)
+Caused by: java.lang.IllegalArgumentException: source must not be null
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.requireNotNull(KtDiagnosticReportHelpers.kt:68)
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn(KtDiagnosticReportHelpers.kt:39)
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn$default(KtDiagnosticReportHelpers.kt:31)
+	at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkSourceElement(FirIncompatibleClassExpressionChecker.kt:50)
+	at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkType$checkers(FirIncompatibleClassExpressionChecker.kt:42)
+	at org.jetbrains.kotlin.fir.analysis.checkers.type.FirIncompatibleClassTypeChecker.check(FirIncompatibleClassTypeChecker.kt:17)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.check(TypeCheckersDiagnosticComponent.kt:81)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:53)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:19)
+	at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
+	at org.jetbrains.kotlin.fir.analysis.collectors.CheckerRunningDiagnosticCollectorVisitor.checkElement(CheckerRunningDiagnosticCollectorVisitor.kt:24)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:248)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirSimpleFunctionImpl.acceptChildren(FirSimpleFunctionImpl.kt:63)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:118)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirSimpleFunction.accept(FirSimpleFunction.kt:51)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirRegularClassImpl.acceptChildren(FirRegularClassImpl.kt:63)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitClassAndChildren(AbstractDiagnosticCollectorVisitor.kt:87)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:92)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirRegularClass.accept(FirRegularClass.kt:48)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirFileImpl.acceptChildren(FirFileImpl.kt:57)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:1151)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirFile.accept(FirFile.kt:42)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollector.collectDiagnostics(AbstractDiagnosticCollector.kt:36)
+	at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:34)
+	... 33 more
+
+

.kotlin/errors/errors-1764509520395.log

@@ -0,0 +1,76 @@
+kotlin version: 2.0.21
+error message: org.jetbrains.kotlin.util.FileAnalysisException: While analysing C:/Users/Admin/AndroidStudioProjects/NTO-2025-Android-TeamTask/app/src/main/java/ru/myitschool/work/App.kt:7:5: java.lang.IllegalArgumentException: source must not be null
+	at org.jetbrains.kotlin.util.AnalysisExceptionsKt.wrapIntoFileAnalysisExceptionIfNeeded(AnalysisExceptions.kt:57)
+	at org.jetbrains.kotlin.fir.FirCliExceptionHandler.handleExceptionOnFileAnalysis(Utils.kt:249)
+	at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:46)
+	at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.resolveAndCheckFir(firUtils.kt:77)
+	at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.buildResolveAndCheckFirViaLightTree(firUtils.kt:88)
+	at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModuleToAnalyzedFir(jvmCompilerPipeline.kt:319)
+	at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModulesUsingFrontendIrAndLightTree(jvmCompilerPipeline.kt:118)
+	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:148)
+	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:43)
+	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:103)
+	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:49)
+	at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
+	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:464)
+	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:73)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.doCompile(IncrementalCompilerRunner.kt:506)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:423)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileNonIncrementally(IncrementalCompilerRunner.kt:301)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:129)
+	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:675)
+	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:92)
+	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1660)
+	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
+	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
+	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
+	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport.serviceCall(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source)
+	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
+	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
+	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
+	at java.base/java.lang.Thread.run(Unknown Source)
+Caused by: java.lang.IllegalArgumentException: source must not be null
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.requireNotNull(KtDiagnosticReportHelpers.kt:68)
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn(KtDiagnosticReportHelpers.kt:39)
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn$default(KtDiagnosticReportHelpers.kt:31)
+	at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkSourceElement(FirIncompatibleClassExpressionChecker.kt:50)
+	at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkType$checkers(FirIncompatibleClassExpressionChecker.kt:42)
+	at org.jetbrains.kotlin.fir.analysis.checkers.type.FirIncompatibleClassTypeChecker.check(FirIncompatibleClassTypeChecker.kt:17)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.check(TypeCheckersDiagnosticComponent.kt:81)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:53)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:19)
+	at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
+	at org.jetbrains.kotlin.fir.analysis.collectors.CheckerRunningDiagnosticCollectorVisitor.checkElement(CheckerRunningDiagnosticCollectorVisitor.kt:24)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:248)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirSimpleFunctionImpl.acceptChildren(FirSimpleFunctionImpl.kt:63)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:118)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirSimpleFunction.accept(FirSimpleFunction.kt:51)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirRegularClassImpl.acceptChildren(FirRegularClassImpl.kt:63)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitClassAndChildren(AbstractDiagnosticCollectorVisitor.kt:87)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:92)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirRegularClass.accept(FirRegularClass.kt:48)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirFileImpl.acceptChildren(FirFileImpl.kt:57)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:1151)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirFile.accept(FirFile.kt:42)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollector.collectDiagnostics(AbstractDiagnosticCollector.kt:36)
+	at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:34)
+	... 33 more
+
+

.kotlin/errors/errors-1764603791320.log

@@ -0,0 +1,76 @@
+kotlin version: 2.0.21
+error message: org.jetbrains.kotlin.util.FileAnalysisException: While analysing C:/Users/Admin/AndroidStudioProjects/NTO-2025-Android-TeamTask/app/src/main/java/ru/myitschool/work/App.kt:7:5: java.lang.IllegalArgumentException: source must not be null
+	at org.jetbrains.kotlin.util.AnalysisExceptionsKt.wrapIntoFileAnalysisExceptionIfNeeded(AnalysisExceptions.kt:57)
+	at org.jetbrains.kotlin.fir.FirCliExceptionHandler.handleExceptionOnFileAnalysis(Utils.kt:249)
+	at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:46)
+	at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.resolveAndCheckFir(firUtils.kt:77)
+	at org.jetbrains.kotlin.fir.pipeline.FirUtilsKt.buildResolveAndCheckFirViaLightTree(firUtils.kt:88)
+	at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModuleToAnalyzedFir(jvmCompilerPipeline.kt:319)
+	at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.JvmCompilerPipelineKt.compileModulesUsingFrontendIrAndLightTree(jvmCompilerPipeline.kt:118)
+	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:148)
+	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:43)
+	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:103)
+	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:49)
+	at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
+	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:464)
+	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:73)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.doCompile(IncrementalCompilerRunner.kt:506)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:423)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileNonIncrementally(IncrementalCompilerRunner.kt:301)
+	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:129)
+	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:675)
+	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:92)
+	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1660)
+	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
+	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
+	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport$1.run(Unknown Source)
+	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
+	at java.rmi/sun.rmi.transport.Transport.serviceCall(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source)
+	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
+	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
+	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
+	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
+	at java.base/java.lang.Thread.run(Unknown Source)
+Caused by: java.lang.IllegalArgumentException: source must not be null
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.requireNotNull(KtDiagnosticReportHelpers.kt:68)
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn(KtDiagnosticReportHelpers.kt:39)
+	at org.jetbrains.kotlin.diagnostics.KtDiagnosticReportHelpersKt.reportOn$default(KtDiagnosticReportHelpers.kt:31)
+	at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkSourceElement(FirIncompatibleClassExpressionChecker.kt:50)
+	at org.jetbrains.kotlin.fir.analysis.checkers.expression.FirIncompatibleClassExpressionChecker.checkType$checkers(FirIncompatibleClassExpressionChecker.kt:42)
+	at org.jetbrains.kotlin.fir.analysis.checkers.type.FirIncompatibleClassTypeChecker.check(FirIncompatibleClassTypeChecker.kt:17)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.check(TypeCheckersDiagnosticComponent.kt:81)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:53)
+	at org.jetbrains.kotlin.fir.analysis.collectors.components.TypeCheckersDiagnosticComponent.visitResolvedTypeRef(TypeCheckersDiagnosticComponent.kt:19)
+	at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
+	at org.jetbrains.kotlin.fir.analysis.collectors.CheckerRunningDiagnosticCollectorVisitor.checkElement(CheckerRunningDiagnosticCollectorVisitor.kt:24)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:248)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitResolvedTypeRef(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.types.FirResolvedTypeRef.accept(FirResolvedTypeRef.kt:28)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirSimpleFunctionImpl.acceptChildren(FirSimpleFunctionImpl.kt:63)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:118)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitSimpleFunction(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirSimpleFunction.accept(FirSimpleFunction.kt:51)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirRegularClassImpl.acceptChildren(FirRegularClassImpl.kt:63)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitWithDeclarationAndReceiver(AbstractDiagnosticCollectorVisitor.kt:311)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitClassAndChildren(AbstractDiagnosticCollectorVisitor.kt:87)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:92)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitRegularClass(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirRegularClass.accept(FirRegularClass.kt:48)
+	at org.jetbrains.kotlin.fir.declarations.impl.FirFileImpl.acceptChildren(FirFileImpl.kt:57)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitNestedElements(AbstractDiagnosticCollectorVisitor.kt:38)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:1151)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollectorVisitor.visitFile(AbstractDiagnosticCollectorVisitor.kt:30)
+	at org.jetbrains.kotlin.fir.declarations.FirFile.accept(FirFile.kt:42)
+	at org.jetbrains.kotlin.fir.analysis.collectors.AbstractDiagnosticCollector.collectDiagnostics(AbstractDiagnosticCollector.kt:36)
+	at org.jetbrains.kotlin.fir.pipeline.AnalyseKt.runCheckers(analyse.kt:34)
+	... 33 more
+
+

README.md

@@ -1,4 +1,4 @@
-# НТО 2025. II отборочный этап. Командные задания — Android
+ # НТО 2025. II отборочный этап. Командные задания — Android
 
 ## 📖 Предыстория
 

app/build.gradle.kts

@@ -1,20 +1,19 @@
 plugins {
-    composeCompiler
-    kotlinAndroid
-    kotlinSerialization version Version.Kotlin.language
-    androidApplication
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+    id("org.jetbrains.kotlin.plugin.compose")
+    id("org.jetbrains.kotlin.plugin.serialization")
 }
-
 val packageName = "ru.myitschool.work"
 
 android {
     namespace = packageName
-    compileSdk = Version.Android.Sdk.compile
+    compileSdk = 36
 
     defaultConfig {
         applicationId = packageName
-        minSdk = Version.Android.Sdk.min
-        targetSdk = Version.Android.Sdk.target
+        minSdk = 28
+        targetSdk = 36
         versionCode = 1
         versionName = "1.0"
 
@@ -25,17 +24,17 @@ android {
     buildFeatures.viewBinding = true
 
     compileOptions {
-        sourceCompatibility = Version.Kotlin.javaSource
-        targetCompatibility = Version.Kotlin.javaSource
+        sourceCompatibility = /*Version.Kotlin.javaSource*/JavaVersion.VERSION_17
+        targetCompatibility = /*Version.Kotlin.javaSource*/JavaVersion.VERSION_17
     }
 
     kotlinOptions {
-        jvmTarget = Version.Kotlin.jvmTarget
+        jvmTarget = /*Version.Kotlin.jvmTarget*/"17"
     }
 }
 
 dependencies {
-    defaultComposeLibrary()
+/*    defaultComposeLibrary()*/
     implementation("androidx.datastore:datastore-preferences:1.1.7")
     implementation("org.jetbrains.kotlinx:kotlinx-collections-immutable:0.4.0")
     implementation("androidx.navigation:navigation-compose:2.9.6")
@@ -48,4 +47,34 @@ dependencies {
     implementation("io.ktor:ktor-client-content-negotiation:$ktor")
     implementation("io.ktor:ktor-serialization-kotlinx-json:$ktor")
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.9.0")
+
+    implementation("androidx.compose.ui:ui")
+    implementation("androidx.compose.ui:ui-graphics")
+    implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material3:material3")
+
+
+    implementation("io.ktor:ktor-client-core:$ktor")
+    implementation("io.ktor:ktor-client-cio:$ktor")
+    implementation("io.ktor:ktor-client-content-negotiation:$ktor")
+    implementation("io.ktor:ktor-serialization-kotlinx-json:$ktor")
+
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.9.0")
+
+
+    implementation("androidx.activity:activity-compose:1.9.3")
+
+
+    implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.8.7")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.8.7")
+
+
+    implementation(platform("androidx.compose:compose-bom:2024.09.00"))
+    implementation("androidx.compose.ui:ui")
+    implementation("androidx.compose.ui:ui-graphics")
+    implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material3:material3")
+
+    debugImplementation("androidx.compose.ui:ui-tooling")
+    debugImplementation("androidx.compose.ui:ui-test-manifest")
 }

app/src/main/java/ru/myitschool/work/core/DateUtils.kt

@@ -0,0 +1,35 @@
+package ru.myitschool.work.core
+
+import java.time.LocalDate
+import java.time.OffsetDateTime
+import java.time.format.DateTimeFormatter
+
+object DateUtils {
+
+    private val mainFormatter: DateTimeFormatter =
+        DateTimeFormatter.ofPattern("dd.MM.yyyy")
+    private val bookFormatter: DateTimeFormatter =
+        DateTimeFormatter.ofPattern("dd.MM")
+
+    fun parseDate(raw: String): LocalDate? {
+        return runCatching { LocalDate.parse(raw) }.getOrElse {
+            runCatching { OffsetDateTime.parse(raw).toLocalDate() }.getOrElse {
+                runCatching {
+                    LocalDate.parse(raw, DateTimeFormatter.ofPattern("dd.MM.yyyy"))
+                }.getOrNull()
+            }
+        }
+    }
+
+    // Формат для главного экрана: dd.MM.yyyy
+    fun formatForMain(raw: String): String {
+        val date = parseDate(raw) ?: return raw
+        return date.format(mainFormatter)
+    }
+
+    // Формат для экрана бронирования: dd.MM
+    fun formatForBook(raw: String): String {
+        val date = parseDate(raw) ?: return raw
+        return date.format(bookFormatter)
+    }
+}

app/src/main/java/ru/myitschool/work/data/repo/AuthDataStoreExt.kt

@@ -0,0 +1,7 @@
+    package ru.myitschool.work.data.repo
+
+import android.content.Context
+import androidx.datastore.preferences.preferencesDataStore
+
+// DataStore для хранения auth-кода
+val Context.authDataStore by preferencesDataStore(name = "auth_data")

app/src/main/java/ru/myitschool/work/data/repo/AuthRepository.kt

@@ -1,16 +1,47 @@
 package ru.myitschool.work.data.repo
 
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import ru.myitschool.work.App
 import ru.myitschool.work.data.source.NetworkDataSource
 
 object AuthRepository {
 
+    private val dataStore get() = App.context.authDataStore
+    private val KEY_CODE = stringPreferencesKey("auth_code")
     private var codeCache: String? = null
 
+
     suspend fun checkAndSave(text: String): Result<Boolean> {
         return NetworkDataSource.checkAuth(text).onSuccess { success ->
             if (success) {
                 codeCache = text
+                dataStore.edit { prefs ->
+                    prefs[KEY_CODE] = text
+                }
             }
         }
     }
+
+
+    suspend fun getSavedCode(): String? {
+        codeCache?.let { return it }
+
+        val code = dataStore.data
+            .map { prefs -> prefs[KEY_CODE] }
+            .first()
+
+        codeCache = code
+        return code
+    }
+
+
+    suspend fun clear() {
+        codeCache = null
+        dataStore.edit { prefs ->
+            prefs.clear()
+        }
+    }
 }

app/src/main/java/ru/myitschool/work/data/repo/UserRepository.kt

@@ -0,0 +1,92 @@
+package ru.myitschool.work.data.repo
+
+import java.time.LocalDate
+import ru.myitschool.work.core.DateUtils
+import ru.myitschool.work.data.source.NetworkDataSource
+import ru.myitschool.work.data.source.dto.AvailablePlaceDto
+import ru.myitschool.work.data.source.dto.BookedPlaceDto
+import ru.myitschool.work.data.source.dto.UserDto
+import ru.myitschool.work.domain.entities.BookingEntity
+import ru.myitschool.work.domain.entities.UserEntity
+
+object UserRepository {
+
+
+    suspend fun getUserInfo(): Result<UserEntity> {
+        val code = AuthRepository.getSavedCode()
+            ?: return Result.failure(IllegalStateException("Auth code is not saved"))
+
+        return NetworkDataSource
+            .getUserInfo(code)
+            .map { dto -> dto.toDomainUser() }
+    }
+
+
+    suspend fun getAvailableBookings(): Result<List<BookingEntity>> {
+        val code = AuthRepository.getSavedCode()
+            ?: return Result.failure(IllegalStateException("Auth code is not saved"))
+
+        return NetworkDataSource
+            .getAvailableBookings(code)
+            .map { map -> map.toDomainBookings() }
+    }
+
+
+    suspend fun book(date: String, placeId: Int): Result<Unit> {
+        val code = AuthRepository.getSavedCode()
+            ?: return Result.failure(IllegalStateException("Auth code is not saved"))
+
+        return NetworkDataSource.book(
+            code = code,
+            date = date,
+            placeId = placeId,
+        )
+    }
+
+
+    private fun UserDto.toDomainUser(): UserEntity {
+        val bookings = booking
+            .flatMap { (dateString, bookedPlace) ->
+                listOfNotNull(bookedPlace.toDomainBooking(dateString))
+            }
+            .sortedBy { booking ->
+                DateUtils.parseDate(booking.time) ?: LocalDate.MAX
+            }
+
+        return UserEntity(
+            name = name,
+            photoUrl = photoUrl,
+            bookings = bookings,
+        )
+    }
+
+    private fun Map<String, List<AvailablePlaceDto>>.toDomainBookings(): List<BookingEntity> {
+        return entries
+            .flatMap { (dateString, places) ->
+                places.mapNotNull { dto ->
+                    dto.toDomainBooking(dateString)
+                }
+            }
+            .sortedBy { booking ->
+                DateUtils.parseDate(booking.time) ?: LocalDate.MAX
+            }
+    }
+
+    private fun BookedPlaceDto.toDomainBooking(dateString: String): BookingEntity? {
+        val parsedDate = DateUtils.parseDate(dateString) ?: return null
+        return BookingEntity(
+            id = id,
+            roomName = place,
+            time = parsedDate.toString(),
+        )
+    }
+
+    private fun AvailablePlaceDto.toDomainBooking(dateString: String): BookingEntity? {
+        val parsedDate = DateUtils.parseDate(dateString) ?: return null
+        return BookingEntity(
+            id = id,
+            roomName = place,
+            time = parsedDate.toString(),
+        )
+    }
+}

app/src/main/java/ru/myitschool/work/data/source/NetworkDataSource.kt

@@ -1,18 +1,32 @@
 package ru.myitschool.work.data.source
 
 import io.ktor.client.HttpClient
+import io.ktor.client.call.body
 import io.ktor.client.engine.cio.CIO
 import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
 import io.ktor.client.request.get
+import io.ktor.client.request.post
+import io.ktor.client.request.setBody
 import io.ktor.client.statement.bodyAsText
+import io.ktor.client.utils.EmptyContent.contentType
+import io.ktor.http.ContentType
 import io.ktor.http.HttpStatusCode
+import io.ktor.http.contentType
 import io.ktor.serialization.kotlinx.json.json
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import kotlinx.serialization.json.Json
 import ru.myitschool.work.core.Constants
+import ru.myitschool.work.data.source.dto.AvailablePlaceDto
+import ru.myitschool.work.data.source.dto.BookRequestDto
+import ru.myitschool.work.data.source.dto.BookedPlaceDto
+import ru.myitschool.work.data.source.dto.UserDto
 
 object NetworkDataSource {
+
+
+    private const val USE_STUB: Boolean = false
+
     private val client by lazy {
         HttpClient(CIO) {
             install(ContentNegotiation) {
@@ -20,7 +34,7 @@ object NetworkDataSource {
                     Json {
                         isLenient = true
                         ignoreUnknownKeys = true
-                        explicitNulls = true
+                        explicitNulls = false
                         encodeDefaults = true
                     }
                 )
@@ -28,15 +42,132 @@ object NetworkDataSource {
         }
     }
 
-    suspend fun checkAuth(code: String): Result<Boolean> = withContext(Dispatchers.IO) {
-        return@withContext runCatching {
-            val response = client.get(getUrl(code, Constants.AUTH_URL))
-            when (response.status) {
-                HttpStatusCode.OK -> true
-                else -> error(response.bodyAsText())
+    // --------- Заглушечные данные ---------
+
+    private val stubUser = UserDto(
+        name = "Тестовый пользователь",
+        photoUrl = null,
+        booking = mapOf(
+            "2025-01-05" to BookedPlaceDto(id = 1, place = "102"),
+            "2025-01-06" to BookedPlaceDto(id = 2, place = "209.13"),
+            "2025-01-09" to BookedPlaceDto(id = 3, place = "Зона 51. 50"),
+        ),
+    )
+
+    private val stubAvailableBookings: Map<String, List<AvailablePlaceDto>> = mapOf(
+        "2025-01-05" to listOf(
+            AvailablePlaceDto(id = 1, place = "102"),
+            AvailablePlaceDto(id = 2, place = "209.13"),
+        ),
+        "2025-01-06" to listOf(
+            AvailablePlaceDto(id = 3, place = "Зона 51. 50"),
+        ),
+        "2025-01-07" to listOf(
+            AvailablePlaceDto(id = 4, place = "102"),
+            AvailablePlaceDto(id = 5, place = "209.13"),
+        ),
+        "2025-01-08" to listOf(
+            AvailablePlaceDto(id = 6, place = "209.13"),
+        ),
+    )
+
+    // ----------------- Публичные методы -----------------
+
+
+    suspend fun checkAuth(code: String): Result<Boolean> {
+        if (USE_STUB) {
+            // Примитивная проверка заглушки: 4+ символа → ок
+            return Result.success(code.length >= 4)
+        }
+
+        return withContext(Dispatchers.IO) {
+            runCatching {
+                val response = client.get(getUrl(code, Constants.AUTH_URL))
+                when (response.status) {
+                    HttpStatusCode.OK -> true
+                    HttpStatusCode.BadRequest,
+                    HttpStatusCode.Unauthorized -> error(response.bodyAsText())
+                    else -> error(response.bodyAsText())
+                }
             }
         }
     }
 
-    private fun getUrl(code: String, targetUrl: String) = "${Constants.HOST}/api/$code$targetUrl"
+
+    suspend fun getUserInfo(code: String): Result<UserDto> {
+        if (USE_STUB) {
+            return Result.success(stubUser)
+        }
+
+        return withContext(Dispatchers.IO) {
+            runCatching {
+                val response = client.get(getUrl(code, Constants.INFO_URL))
+                when (response.status) {
+                    HttpStatusCode.OK -> response.body<UserDto>()
+                    HttpStatusCode.BadRequest,
+                    HttpStatusCode.Unauthorized -> error(response.bodyAsText())
+                    else -> error(response.bodyAsText())
+                }
+            }
+        }
+    }
+
+
+    suspend fun getAvailableBookings(
+        code: String,
+    ): Result<Map<String, List<AvailablePlaceDto>>> {
+        if (USE_STUB) {
+            return Result.success(stubAvailableBookings)
+        }
+
+        return withContext(Dispatchers.IO) {
+            runCatching {
+                val response = client.get(getUrl(code, Constants.BOOKING_URL))
+                when (response.status) {
+                    HttpStatusCode.OK ->
+                        response.body<Map<String, List<AvailablePlaceDto>>>()
+                    HttpStatusCode.BadRequest,
+                    HttpStatusCode.Unauthorized -> error(response.bodyAsText())
+                    else -> error(response.bodyAsText())
+                }
+            }
+        }
+    }
+
+
+    suspend fun book(
+        code: String,
+        date: String,
+        placeId: Int,
+    ): Result<Unit> {
+        if (USE_STUB) {
+            // В режиме заглушки считаем, что всё прошло успешно
+            return Result.success(Unit)
+        }
+
+        return withContext(Dispatchers.IO) {
+            runCatching {
+                val response = client.post(getUrl(code, Constants.BOOK_URL)) {
+                    contentType(ContentType.Application.Json)
+                    setBody(
+                        BookRequestDto(
+                            date = date,
+                            placeId = placeId,
+                        )
+                    )
+                }
+                when (response.status) {
+                    HttpStatusCode.Created,
+                    HttpStatusCode.OK -> Unit
+                    HttpStatusCode.Conflict -> error("Уже забронировано")
+                    HttpStatusCode.BadRequest,
+                    HttpStatusCode.Unauthorized -> error(response.bodyAsText())
+                    else -> error(response.bodyAsText())
+                }
+            }
+        }
+    }
+
+    private fun getUrl(code: String, targetUrl: String): String =
+        "${Constants.HOST}/api/$code$targetUrl"
 }

app/src/main/java/ru/myitschool/work/data/source/dto/UserDto.kt

@@ -0,0 +1,41 @@
+package ru.myitschool.work.data.source.dto
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class UserDto(
+    @SerialName("name")
+    val name: String,
+    @SerialName("photoUrl")
+    val photoUrl: String? = null,
+    @SerialName("booking")
+    val booking: Map<String, BookedPlaceDto> = emptyMap(),
+)
+
+
+@Serializable
+data class BookedPlaceDto(
+    @SerialName("id")
+    val id: Int,
+    @SerialName("place")
+    val place: String,
+)
+
+
+@Serializable
+data class AvailablePlaceDto(
+    @SerialName("id")
+    val id: Int,
+    @SerialName("place")
+    val place: String,
+)
+
+
+@Serializable
+data class BookRequestDto(
+    @SerialName("date")
+    val date: String,
+    @SerialName("placeID")
+    val placeId: Int,
+)

app/src/main/java/ru/myitschool/work/domain/auth/ClearAuthDataUseCase.kt

@@ -0,0 +1,11 @@
+package ru.myitschool.work.domain.auth
+
+import ru.myitschool.work.data.repo.AuthRepository
+
+class ClearAuthDataUseCase(
+    private val repository: AuthRepository
+) {
+    suspend operator fun invoke() {
+        repository.clear()
+    }
+}

app/src/main/java/ru/myitschool/work/domain/auth/GetSavedAuthCodeUseCase.kt

@@ -0,0 +1,11 @@
+package ru.myitschool.work.domain.auth
+
+import ru.myitschool.work.data.repo.AuthRepository
+
+class GetSavedAuthCodeUseCase(
+    private val repository: AuthRepository
+) {
+    suspend operator fun invoke(): String? {
+        return repository.getSavedCode()
+    }
+}

app/src/main/java/ru/myitschool/work/domain/booking/BookPlaceUseCase.kt

@@ -0,0 +1,13 @@
+package ru.myitschool.work.domain.booking
+
+import ru.myitschool.work.data.repo.UserRepository
+
+class BookPlaceUseCase(
+    private val repository: UserRepository,
+) {
+    suspend operator fun invoke(roomName: String, placeId: Int): Result<Unit> {
+        // Нужно получить дату из какого-то источника
+        // Либо изменить логику в ViewModel
+        return repository.book(roomName, placeId) // ← но repository.book ожидает date, а не roomName
+    }
+}

app/src/main/java/ru/myitschool/work/domain/booking/GetAvailableBookingsUseCase.kt

@@ -0,0 +1,12 @@
+//package ru.myitschool.work.domain.booking
+//
+//import ru.myitschool.work.data.repo.UserRepository
+//import ru.myitschool.work.domain.entities.BookingEntity
+//
+//class GetAvailableBookingsUseCase(
+//    private val repository: UserRepository
+//) {
+//    suspend operator fun invoke(): Result<List<BookingEntity>> {
+//        return repository.getAvailableBookings()
+//    }
+//}

app/src/main/java/ru/myitschool/work/domain/entities/BookingEntity.kt

@@ -0,0 +1,7 @@
+package ru.myitschool.work.domain.entities
+
+data class BookingEntity(
+    val id: Int,
+    val roomName: String,
+    val time: String,
+)

app/src/main/java/ru/myitschool/work/domain/entities/UserEntity.kt

@@ -0,0 +1,7 @@
+package ru.myitschool.work.domain.entities
+
+data class UserEntity(
+    val name: String,
+    val photoUrl: String?,
+    val bookings: List<BookingEntity>,
+)

app/src/main/java/ru/myitschool/work/domain/user/GetAvailableBookingsUseCase.kt

@@ -0,0 +1,12 @@
+package ru.myitschool.work.domain.booking
+
+import ru.myitschool.work.data.repo.UserRepository
+import ru.myitschool.work.domain.entities.BookingEntity
+
+class GetAvailableBookingsUseCase(
+    private val repository: UserRepository
+) {
+    suspend operator fun invoke(): Result<List<BookingEntity>> {
+        return repository.getAvailableBookings()
+    }
+}

app/src/main/java/ru/myitschool/work/domain/user/GetUserInfoUseCase.kt

@@ -0,0 +1,12 @@
+package ru.myitschool.work.domain.user
+
+import ru.myitschool.work.data.repo.UserRepository
+import ru.myitschool.work.domain.entities.UserEntity
+
+class GetUserInfoUseCase(
+    private val repository: UserRepository
+) {
+    suspend operator fun invoke(): Result<UserEntity> {
+        return repository.getUserInfo()
+    }
+}

app/src/main/java/ru/myitschool/work/ui/root/RootActivity.kt

@@ -15,6 +15,7 @@ class RootActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
+        actionBar?.hide()
         setContent {
             WorkTheme {
                 Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->

app/src/main/java/ru/myitschool/work/ui/screen/NavigationGraph.kt

@@ -2,48 +2,62 @@ package ru.myitschool.work.ui.screen
 
 import androidx.compose.animation.EnterTransition
 import androidx.compose.animation.ExitTransition
-import androidx.compose.foundation.layout.Box
-import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.Alignment
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.produceState
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
+import ru.myitschool.work.data.repo.AuthRepository
+import ru.myitschool.work.domain.auth.GetSavedAuthCodeUseCase
 import ru.myitschool.work.ui.nav.AuthScreenDestination
 import ru.myitschool.work.ui.nav.BookScreenDestination
 import ru.myitschool.work.ui.nav.MainScreenDestination
 import ru.myitschool.work.ui.screen.auth.AuthScreen
+import ru.myitschool.work.ui.screen.book.BookScreen
+import ru.myitschool.work.ui.screen.main.MainScreen
 
 @Composable
 fun AppNavHost(
     modifier: Modifier = Modifier,
     navController: NavHostController = rememberNavController()
 ) {
+    // use case для проверки, есть ли сохранённый код
+    val getSavedAuthCodeUseCase = remember {
+        GetSavedAuthCodeUseCase(AuthRepository)
+    }
+
+    // асинхронно определяем, с какого экрана стартовать
+    val startDestination by produceState<Any?>(initialValue = null) {
+        val savedCode = getSavedAuthCodeUseCase()
+        value = if (savedCode.isNullOrBlank()) {
+            AuthScreenDestination
+        } else {
+            MainScreenDestination
+        }
+    }
+
+
+    val destination = startDestination ?: return
+
     NavHost(
         modifier = modifier,
         enterTransition = { EnterTransition.None },
         exitTransition = { ExitTransition.None },
         navController = navController,
-        startDestination = AuthScreenDestination,
+        startDestination = destination,
     ) {
         composable<AuthScreenDestination> {
             AuthScreen(navController = navController)
         }
         composable<MainScreenDestination> {
-            Box(
-                contentAlignment = Alignment.Center
-            ) {
-                Text(text = "Hello")
-            }
+            MainScreen(navController = navController)
         }
         composable<BookScreenDestination> {
-            Box(
-                contentAlignment = Alignment.Center
-            ) {
-                Text(text = "Hello")
-            }
+            BookScreen(navController = navController)
         }
     }
 }

app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthScreen.kt

@@ -2,6 +2,7 @@ package ru.myitschool.work.ui.screen.auth
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
@@ -9,25 +10,27 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.material3.Button
 import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextField
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
+import io.ktor.websocket.Frame
 import ru.myitschool.work.R
 import ru.myitschool.work.core.TestIds
 import ru.myitschool.work.ui.nav.MainScreenDestination
@@ -41,7 +44,10 @@ fun AuthScreen(
 
     LaunchedEffect(Unit) {
         viewModel.actionFlow.collect {
-            navController.navigate(MainScreenDestination)
+            navController.navigate(MainScreenDestination) {
+                // очищаем backstack до экрана авторизации
+                popUpTo(MainScreenDestination) { inclusive = true }
+            }
         }
     }
 
@@ -50,8 +56,20 @@ fun AuthScreen(
             .fillMaxSize()
             .padding(all = 24.dp),
         horizontalAlignment = Alignment.CenterHorizontally,
-        verticalArrangement = Arrangement.Center
+        verticalArrangement = Arrangement.Top
     ) {
+        Spacer(modifier = Modifier.size(48.dp))
+
+        Text(
+            text = stringResource(R.string.auth_name),
+            style = MaterialTheme.typography.displaySmall.copy(
+                fontWeight = FontWeight.Bold
+            ),
+            textAlign = TextAlign.Center
+        )
+
+        Spacer(modifier = Modifier.size(48.dp))
+
         Text(
             text = stringResource(R.string.auth_title),
             style = MaterialTheme.typography.headlineSmall,
@@ -60,6 +78,7 @@ fun AuthScreen(
         when (val currentState = state) {
             is AuthState.Data -> Content(viewModel, currentState)
             is AuthState.Loading -> {
+                Spacer(modifier = Modifier.size(24.dp))
                 CircularProgressIndicator(
                     modifier = Modifier.size(64.dp)
                 )
@@ -73,25 +92,54 @@ private fun Content(
     viewModel: AuthViewModel,
     state: AuthState.Data
 ) {
-    var inputText by remember { mutableStateOf("") }
     Spacer(modifier = Modifier.size(16.dp))
-    TextField(
-        modifier = Modifier.testTag(TestIds.Auth.CODE_INPUT).fillMaxWidth(),
-        value = inputText,
-        onValueChange = {
-            inputText = it
-            viewModel.onIntent(AuthIntent.TextInput(it))
-        },
-        label = { Text(stringResource(R.string.auth_label)) }
+
+    OutlinedTextField(
+        modifier = Modifier
+            .testTag(TestIds.Auth.CODE_INPUT)
+            .fillMaxWidth(),
+        value = state.code,
+        onValueChange = { viewModel.onIntent(AuthIntent.TextInput(it)) },
+        label = { Text(stringResource(R.string.auth_label)) },
+        placeholder = { Text("Введите код сотрудника") }
     )
+
+    Spacer(modifier = Modifier.size(8.dp))
+
+    if (state.isErrorVisible) {
+        Text(
+            modifier = Modifier
+                .fillMaxWidth()
+                .testTag(TestIds.Auth.ERROR),
+            text = "Неверный код или ошибка сервера",
+            color = MaterialTheme.colorScheme.error,
+            textAlign = TextAlign.Center,
+            style = MaterialTheme.typography.bodyMedium
+        )
+        Spacer(modifier = Modifier.size(8.dp))
+    }
+
     Spacer(modifier = Modifier.size(16.dp))
+
     Button(
-        modifier = Modifier.testTag(TestIds.Auth.SIGN_BUTTON).fillMaxWidth(),
+        modifier = Modifier
+            .testTag(TestIds.Auth.SIGN_BUTTON)
+            .fillMaxWidth(),
         onClick = {
-            viewModel.onIntent(AuthIntent.Send(inputText))
+            viewModel.onIntent(AuthIntent.Send(state.code))
         },
-        enabled = true
+        enabled = state.isButtonEnabled
     ) {
-        Text(stringResource(R.string.auth_sign_in))
+        Row(
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(stringResource(R.string.auth_sign_in))
+            Spacer(modifier = Modifier.size(8.dp))
+            Icon(
+                painter = painterResource(R.drawable.ic_arrow_right),
+                contentDescription = "Войти"
+            )
+        }
+
     }
 }

app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthState.kt

@@ -1,6 +1,11 @@
 package ru.myitschool.work.ui.screen.auth
 
 sealed interface AuthState {
-    object Loading: AuthState
-    object Data: AuthState
+    object Loading : AuthState
+
+    data class Data(
+        val code: String = "",
+        val isButtonEnabled: Boolean = false,
+        val isErrorVisible: Boolean = false,
+    ) : AuthState
 }

app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthViewModel.kt

@@ -12,32 +12,82 @@ import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import ru.myitschool.work.data.repo.AuthRepository
 import ru.myitschool.work.domain.auth.CheckAndSaveAuthCodeUseCase
+import ru.myitschool.work.domain.auth.GetSavedAuthCodeUseCase
 
 class AuthViewModel : ViewModel() {
-    private val checkAndSaveAuthCodeUseCase by lazy { CheckAndSaveAuthCodeUseCase(AuthRepository) }
-    private val _uiState = MutableStateFlow<AuthState>(AuthState.Data)
+
+    private val checkAndSaveAuthCodeUseCase by lazy {
+        CheckAndSaveAuthCodeUseCase(AuthRepository)
+    }
+
+    private val getSavedAuthCodeUseCase by lazy {
+        GetSavedAuthCodeUseCase(AuthRepository)
+    }
+
+    private val _uiState = MutableStateFlow<AuthState>(AuthState.Data())
     val uiState: StateFlow<AuthState> = _uiState.asStateFlow()
 
+
     private val _actionFlow: MutableSharedFlow<Unit> = MutableSharedFlow()
     val actionFlow: SharedFlow<Unit> = _actionFlow
 
+    init {
+        viewModelScope.launch(Dispatchers.Default) {
+            val saved = getSavedAuthCodeUseCase()
+            if (saved != null) {
+                _actionFlow.emit(Unit)
+            }
+        }
+    }
+
     fun onIntent(intent: AuthIntent) {
         when (intent) {
+            is AuthIntent.TextInput -> {
+                val newCode = intent.text
+                val isValid = isValidCode(newCode)
+                _uiState.update {
+                    AuthState.Data(
+                        code = newCode,
+                        isButtonEnabled = isValid,
+                        isErrorVisible = false,
+                    )
+                }
+            }
+
             is AuthIntent.Send -> {
+                val currentState = _uiState.value
+                if (currentState !is AuthState.Data) return
+
+                val code = currentState.code
+                if (!isValidCode(code)) return
+
                 viewModelScope.launch(Dispatchers.Default) {
                     _uiState.update { AuthState.Loading }
-                    checkAndSaveAuthCodeUseCase.invoke("9999").fold(
+                    checkAndSaveAuthCodeUseCase.invoke(code).fold(
                         onSuccess = {
+                            // успешная авторизация → навигация на главный экран
                             _actionFlow.emit(Unit)
                         },
                         onFailure = { error ->
                             error.printStackTrace()
-                            _actionFlow.emit(Unit)
+                            _uiState.update {
+                                AuthState.Data(
+                                    code = code,
+                                    isButtonEnabled = true,
+                                    isErrorVisible = true,
+                                )
+                            }
                         }
                     )
                 }
             }
-            is AuthIntent.TextInput -> Unit
+        }
+    }
+
+    private fun isValidCode(text: String): Boolean {
+        if (text.length != 4) return false
+        return text.all { ch ->
+            ch.isDigit() || (ch in 'a'..'z') || (ch in 'A'..'Z')
         }
     }
 }

app/src/main/java/ru/myitschool/work/ui/screen/book/BookIntent.kt

@@ -0,0 +1,9 @@
+package ru.myitschool.work.ui.screen.book
+
+sealed interface BookIntent {
+    data object Load : BookIntent
+    data object Refresh : BookIntent
+    data class SelectDate(val index: Int) : BookIntent
+    data class SelectPlace(val id: Int) : BookIntent
+    data object Book : BookIntent
+}

app/src/main/java/ru/myitschool/work/ui/screen/book/BookScreen.kt

@@ -0,0 +1,357 @@
+package ru.myitschool.work.ui.screen.book
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.selection.selectable
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.RadioButton
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavController
+import ru.myitschool.work.R
+import ru.myitschool.work.core.TestIds
+
+@Composable
+fun BookScreen(
+    navController: NavController,
+    viewModel: BookViewModel = viewModel()
+) {
+    val state by viewModel.uiState.collectAsState()
+
+    LaunchedEffect(Unit) {
+        viewModel.onIntent(BookIntent.Load)
+
+        viewModel.actionFlow.collect { action ->
+            when (action) {
+                BookViewModel.Action.CloseWithSuccess -> {
+                    navController.popBackStack()
+                }
+            }
+        }
+    }
+
+    when (val current = state) {
+        is BookState.Loading -> {
+            Box(
+                modifier = Modifier.fillMaxSize(),
+                contentAlignment = Alignment.Center
+            ) {
+                CircularProgressIndicator()
+            }
+        }
+
+        is BookState.Error -> {
+            BookErrorContent(
+                message = current.message,
+                onBack = { navController.popBackStack() },
+                onRefresh = { viewModel.onIntent(BookIntent.Refresh) }
+            )
+        }
+
+        is BookState.Empty -> {
+            BookEmptyContent(
+                onBack = { navController.popBackStack() },
+                onRefresh = { viewModel.onIntent(BookIntent.Refresh) }
+            )
+        }
+
+        is BookState.Data -> {
+            BookDataContent(
+                state = current,
+                onBack = { navController.popBackStack() },
+                onRefresh = { viewModel.onIntent(BookIntent.Refresh) },
+                onSelectDate = { viewModel.onIntent(BookIntent.SelectDate(it)) },
+                onSelectPlace = { viewModel.onIntent(BookIntent.SelectPlace(it)) },
+                onBook = { viewModel.onIntent(BookIntent.Book) }
+            )
+        }
+    }
+}
+
+@Composable
+private fun BookErrorContent(
+    message: String,
+    onBack: () -> Unit,
+    onRefresh: () -> Unit
+) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text(
+            modifier = Modifier.testTag(TestIds.Book.ERROR),
+            text = message,
+            color = MaterialTheme.colorScheme.error
+        )
+        Spacer(modifier = Modifier.size(16.dp))
+        Button(
+            modifier = Modifier.testTag(TestIds.Book.REFRESH_BUTTON),
+            onClick = onRefresh
+        ) {
+            Row(
+                horizontalArrangement = Arrangement.Center,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(text = stringResource(R.string.main_screen_refresh))
+                Spacer(modifier = Modifier.size(8.dp))
+                Icon(
+                    painter = painterResource(R.drawable.ic_refresh),
+                    contentDescription = "Обновить"
+                )
+            }
+        }
+        Spacer(modifier = Modifier.size(8.dp))
+        Button(
+            modifier = Modifier.testTag(TestIds.Book.BACK_BUTTON),
+            onClick = onBack
+        ) {
+            Row(
+                horizontalArrangement = Arrangement.Center,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Icon(
+                    painter = painterResource(R.drawable.ic_back),
+                    contentDescription = "Назад"
+                )
+                Spacer(modifier = Modifier.size(8.dp))
+                Text(text = stringResource(R.string.book_screen_back))
+            }
+        }
+    }
+}
+
+@Composable
+private fun BookEmptyContent(
+    onBack: () -> Unit,
+    onRefresh: () -> Unit
+) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text(
+            modifier = Modifier.testTag(TestIds.Book.EMPTY),
+            text = "Всё забронировано"
+        )
+        Spacer(modifier = Modifier.size(16.dp))
+        Button(
+            modifier = Modifier.testTag(TestIds.Book.REFRESH_BUTTON),
+            onClick = onRefresh
+        ) {
+            Row(
+                horizontalArrangement = Arrangement.Center,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(text = stringResource(R.string.main_screen_refresh))
+                Spacer(modifier = Modifier.size(8.dp))
+                Icon(
+                    painter = painterResource(R.drawable.ic_refresh),
+                    contentDescription = "Обновить"
+                )
+            }
+        }
+        Spacer(modifier = Modifier.size(8.dp))
+        Button(
+            modifier = Modifier.testTag(TestIds.Book.BACK_BUTTON),
+            onClick = onBack
+        ) {
+            Row(
+                horizontalArrangement = Arrangement.Center,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Icon(
+                    painter = painterResource(R.drawable.ic_back),
+                    contentDescription = "Назад"
+                )
+                Spacer(modifier = Modifier.size(8.dp))
+                Text(text = stringResource(R.string.book_screen_back))
+            }
+        }
+    }
+}
+
+@Composable
+private fun BookDataContent(
+    state: BookState.Data,
+    onBack: () -> Unit,
+    onRefresh: () -> Unit,
+    onSelectDate: (Int) -> Unit,
+    onSelectPlace: (Int) -> Unit,
+    onBook: () -> Unit,
+) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp)
+    ) {
+        Row(
+            horizontalArrangement = Arrangement.SpaceBetween,
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            Button(
+                modifier = Modifier.testTag(TestIds.Book.BACK_BUTTON),
+                onClick = onBack
+            ) {
+                Row(
+                    horizontalArrangement = Arrangement.Center,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Icon(
+                        painter = painterResource(R.drawable.ic_back),
+                        contentDescription = "Назад"
+                    )
+                    Spacer(modifier = Modifier.size(8.dp))
+                    Text(text = stringResource(R.string.book_screen_back))
+                }
+            }
+            Button(
+                modifier = Modifier.testTag(TestIds.Book.REFRESH_BUTTON),
+                onClick = onRefresh
+            ) {
+                Row(
+                    horizontalArrangement = Arrangement.Center,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Text(text = stringResource(R.string.main_screen_refresh))
+                    Spacer(modifier = Modifier.size(8.dp))
+                    Icon(
+                        painter = painterResource(R.drawable.ic_refresh),
+                        contentDescription = "Обновить"
+                    )
+                }
+            }
+        }
+
+        Spacer(modifier = Modifier.size(16.dp))
+
+
+        LazyRow(
+            horizontalArrangement = Arrangement.spacedBy(8.dp)
+        ) {
+            itemsIndexed(state.dates) { index, dateLabel ->
+                Surface(
+                    modifier = Modifier
+                        .testTag(TestIds.Book.getIdDateItemByPosition(index))
+                        .clickable { onSelectDate(index) }
+                        .clip(RoundedCornerShape(8.dp)),
+                    tonalElevation = if (index == state.selectedDateIndex) 4.dp else 0.dp,
+                    color = if (index == state.selectedDateIndex) {
+                        MaterialTheme.colorScheme.primaryContainer
+                    } else {
+                        MaterialTheme.colorScheme.surface
+                    }
+                ) {
+                    Text(
+                        modifier = Modifier
+                            .padding(horizontal = 12.dp, vertical = 8.dp)
+                            .testTag(TestIds.Book.ITEM_DATE),
+                        text = dateLabel,
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = if (index == state.selectedDateIndex) {
+                            MaterialTheme.colorScheme.onPrimaryContainer
+                        } else {
+                            MaterialTheme.colorScheme.onSurface
+                        }
+                    )
+                }
+            }
+        }
+
+        Spacer(modifier = Modifier.size(16.dp))
+
+
+        LazyColumn(
+            modifier = Modifier.weight(1f),
+            verticalArrangement = Arrangement.spacedBy(8.dp)
+        ) {
+            itemsIndexed(state.places, key = { _, item -> item.id }) { index, item ->
+                Card(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .testTag(TestIds.Book.getIdPlaceItemByPosition(index))
+                        .selectable(
+                            selected = item.isSelected,
+                            onClick = { onSelectPlace(item.id) }
+                        )
+                ) {
+                    Row(
+                        modifier = Modifier
+                            .padding(12.dp),
+                        verticalAlignment = Alignment.CenterVertically
+                    ) {
+                        Column(
+                            modifier = Modifier.weight(1f)
+                        ) {
+                            Text(
+                                modifier = Modifier.testTag(TestIds.Book.ITEM_PLACE_TEXT),
+                                text = "${item.roomName} — ${item.time}",
+                                style = MaterialTheme.typography.bodyMedium
+                            )
+                        }
+                        RadioButton(
+                            modifier = Modifier.testTag(TestIds.Book.ITEM_PLACE_SELECTOR),
+                            selected = item.isSelected,
+                            onClick = { onSelectPlace(item.id) }
+                        )
+                    }
+                }
+            }
+        }
+
+        Spacer(modifier = Modifier.size(8.dp))
+
+        Button(
+            modifier = Modifier
+                .fillMaxWidth()
+                .testTag(TestIds.Book.BOOK_BUTTON),
+            onClick = onBook,
+            enabled = state.places.any { it.isSelected }
+        ) {
+            Row(
+                horizontalArrangement = Arrangement.Center,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(text = stringResource(R.string.book_screen_book))
+                Spacer(modifier = Modifier.size(8.dp))
+                Icon(
+                    painter = painterResource(R.drawable.ic_arrow_right),
+                    contentDescription = "Забронировать"
+                )
+            }
+        }
+    }
+}

app/src/main/java/ru/myitschool/work/ui/screen/book/BookState.kt

@@ -0,0 +1,24 @@
+package ru.myitschool.work.ui.screen.book
+
+data class BookPlaceItem(
+    val id: Int,
+    val roomName: String,
+    val time: String,
+    val isSelected: Boolean,
+)
+
+sealed interface BookState {
+    object Loading : BookState
+
+    data class Data(
+        val dates: List<String>,
+        val selectedDateIndex: Int,
+        val places: List<BookPlaceItem>,
+    ) : BookState
+
+    data class Error(
+        val message: String,
+    ) : BookState
+
+    object Empty : BookState
+}

app/src/main/java/ru/myitschool/work/ui/screen/book/BookViewModel.kt

@@ -0,0 +1,210 @@
+package ru.myitschool.work.ui.screen.book
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import java.time.LocalDate
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import ru.myitschool.work.core.DateUtils
+import ru.myitschool.work.data.repo.UserRepository
+import ru.myitschool.work.domain.booking.BookPlaceUseCase
+import ru.myitschool.work.domain.booking.GetAvailableBookingsUseCase
+import ru.myitschool.work.domain.entities.BookingEntity
+
+class BookViewModel : ViewModel() {
+
+    private val getAvailableBookingsUseCase by lazy {
+        GetAvailableBookingsUseCase(UserRepository)
+    }
+    private val bookPlaceUseCase by lazy {
+        BookPlaceUseCase(UserRepository)
+    }
+
+    private val _uiState = MutableStateFlow<BookState>(BookState.Loading)
+    val uiState: StateFlow<BookState> = _uiState.asStateFlow()
+
+    sealed interface Action {
+        data object CloseWithSuccess : Action
+    }
+
+    private val _actionFlow = MutableSharedFlow<Action>()
+    val actionFlow: SharedFlow<Action> = _actionFlow
+
+    private var allGroups: List<DateGroup> = emptyList()
+    private var selectedDateIndex: Int = 0
+    private var selectedSlotId: Int? = null
+
+    fun onIntent(intent: BookIntent) {
+        when (intent) {
+            BookIntent.Load,
+            BookIntent.Refresh -> {
+                load()
+            }
+
+            is BookIntent.SelectDate -> {
+                selectDate(intent.index)
+            }
+
+            is BookIntent.SelectPlace -> {
+                selectedSlotId = intent.id
+                val current = _uiState.value
+                if (current is BookState.Data) {
+                    val updatedPlaces = current.places.map { item ->
+                        item.copy(isSelected = item.id == intent.id)
+                    }
+                    _uiState.value = current.copy(places = updatedPlaces)
+                }
+            }
+
+            BookIntent.Book -> {
+                book()
+            }
+        }
+    }
+
+    private fun load() {
+        viewModelScope.launch(Dispatchers.Default) {
+            _uiState.value = BookState.Loading
+
+            getAvailableBookingsUseCase()
+                .fold(
+                    onSuccess = { bookings ->
+                        if (bookings.isEmpty()) {
+                            _uiState.value = BookState.Empty
+                            allGroups = emptyList()
+                            selectedSlotId = null
+                            selectedDateIndex = 0
+                            return@fold
+                        }
+
+                        allGroups = groupByDate(bookings)
+
+                        if (allGroups.isEmpty()) {
+                            _uiState.value = BookState.Empty
+                            selectedSlotId = null
+                            selectedDateIndex = 0
+                            return@fold
+                        }
+
+                        selectedDateIndex = 0
+                        selectedSlotId = null
+                        val firstGroup = allGroups[0]
+
+                        val places = firstGroup.slots.map { slot ->
+                            BookPlaceItem(
+                                id = slot.id,
+                                roomName = slot.roomName,
+                                time = slot.time,
+                                isSelected = false,
+                            )
+                        }
+
+                        _uiState.value = BookState.Data(
+                            dates = allGroups.map { it.label },
+                            selectedDateIndex = 0,
+                            places = places,
+                        )
+                    },
+                    onFailure = { error ->
+                        _uiState.value = BookState.Error(
+                            message = error.message ?: "Ошибка загрузки бронирований",
+                        )
+                    }
+                )
+        }
+    }
+
+    private fun selectDate(index: Int) {
+        val groups = allGroups
+        if (index !in groups.indices) return
+
+        selectedDateIndex = index
+        selectedSlotId = null
+        val group = groups[index]
+        val places = group.slots.map { slot ->
+            BookPlaceItem(
+                id = slot.id,
+                roomName = slot.roomName,
+                time = slot.time,
+                isSelected = false,
+            )
+        }
+        val datesLabels = groups.map { it.label }
+
+        val current = _uiState.value
+        _uiState.value = if (current is BookState.Data) {
+            current.copy(
+                dates = datesLabels,
+                selectedDateIndex = index,
+                places = places,
+            )
+        } else {
+            BookState.Data(
+                dates = datesLabels,
+                selectedDateIndex = index,
+                places = places,
+            )
+        }
+    }
+
+    private fun book() {
+        val current = _uiState.value
+        if (current !is BookState.Data) return
+
+        val slotId = selectedSlotId ?: return
+
+        allGroups
+            .flatMap { it.slots }
+            .firstOrNull { it.id == slotId }
+            ?: return
+
+
+        val selectedDate = allGroups[selectedDateIndex].date.toString()
+
+        viewModelScope.launch(Dispatchers.Default) {
+
+            bookPlaceUseCase(selectedDate, slotId)
+                .fold(
+                    onSuccess = {
+                        _actionFlow.emit(Action.CloseWithSuccess)
+                    },
+                    onFailure = { error ->
+                        _uiState.value = BookState.Error(
+                            message = error.message ?: "Ошибка бронирования",
+                        )
+                    }
+                )
+        }
+    }
+
+    private data class DateGroup(
+        val date: LocalDate,
+        val label: String,
+        val slots: List<BookingEntity>,
+    )
+
+    private fun groupByDate(bookings: List<BookingEntity>): List<DateGroup> {
+        val grouped: Map<LocalDate, List<BookingEntity>> =
+            bookings
+                .mapNotNull { booking ->
+                    val date = DateUtils.parseDate(booking.time) ?: return@mapNotNull null
+                    date to booking
+                }
+                .groupBy({ it.first }, { it.second })
+
+        return grouped.entries
+            .sortedBy { it.key }
+            .map { (date, slots) ->
+                DateGroup(
+                    date = date,
+                    label = DateUtils.formatForBook(date.toString()),
+                    slots = slots,
+                )
+            }
+    }
+}

app/src/main/java/ru/myitschool/work/ui/screen/main/MainIntent.kt

@@ -0,0 +1,8 @@
+package ru.myitschool.work.ui.screen.main
+
+sealed interface MainIntent {
+    data object Load : MainIntent
+    data object Refresh : MainIntent
+    data object Logout : MainIntent
+    data object AddBooking : MainIntent
+}

app/src/main/java/ru/myitschool/work/ui/screen/main/MainScreen.kt

@@ -0,0 +1,334 @@
+package ru.myitschool.work.ui.screen.main
+
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Person
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.Icon
+import androidx.compose.material3.SegmentedButtonDefaults.Icon
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.res.colorResource
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavController
+import coil3.compose.SubcomposeAsyncImage
+import org.intellij.lang.annotations.JdkConstants
+import ru.myitschool.work.R
+import ru.myitschool.work.core.TestIds
+import ru.myitschool.work.ui.nav.AuthScreenDestination
+import ru.myitschool.work.ui.nav.BookScreenDestination
+
+@Composable
+fun MainScreen(
+    navController: NavController,
+    viewModel: MainViewModel = viewModel()
+) {
+    val state by viewModel.uiState.collectAsState()
+
+    LaunchedEffect(Unit) {
+        viewModel.onIntent(MainIntent.Load)
+
+        viewModel.actionFlow.collect { action ->
+            when (action) {
+                MainViewModel.Action.NavigateToAuth -> {
+                    navController.navigate(AuthScreenDestination) {
+                        popUpTo(AuthScreenDestination) { inclusive = true }
+                    }
+                }
+                MainViewModel.Action.NavigateToBooking -> {
+                    navController.navigate(BookScreenDestination)
+                }
+            }
+        }
+    }
+
+    when (val current = state) {
+        is MainState.Loading -> {
+            Box(
+                modifier = Modifier.fillMaxSize(),
+                contentAlignment = Alignment.Center
+            ) {
+                CircularProgressIndicator()
+            }
+        }
+
+        is MainState.Error -> {
+            MainErrorContent(
+                message = current.message,
+                onRefresh = { viewModel.onIntent(MainIntent.Refresh) }
+            )
+        }
+
+        is MainState.Data -> {
+            MainDataContent(
+                state = current,
+                onRefresh = { viewModel.onIntent(MainIntent.Refresh) },
+                onLogout = { viewModel.onIntent(MainIntent.Logout) },
+                onAddBooking = { viewModel.onIntent(MainIntent.AddBooking) }
+            )
+        }
+    }
+}
+
+@Composable
+private fun MainErrorContent(
+    message: String,
+    onRefresh: () -> Unit
+) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text(
+            modifier = Modifier.testTag(TestIds.Main.ERROR),
+            text = message,
+            color = MaterialTheme.colorScheme.error
+        )
+        Spacer(modifier = Modifier.size(16.dp))
+        Button(
+            modifier = Modifier.testTag(TestIds.Main.REFRESH_BUTTON),
+            onClick = onRefresh
+        ) {
+            Text("Обновить")
+        }
+    }
+}
+
+@Composable
+private fun MainDataContent(
+    state: MainState.Data,
+    onRefresh: () -> Unit,
+    onLogout: () -> Unit,
+    onAddBooking: () -> Unit
+) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp)
+    ) {
+
+        Spacer(modifier = Modifier.size(16.dp))
+
+        Row(
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Box(
+                modifier = Modifier
+                    .size(64.dp)
+                    .testTag(TestIds.Main.PROFILE_IMAGE),
+                contentAlignment = Alignment.Center
+            ) {
+                UserAvatar(
+                    photoUrl = state.photoUrl,
+                    modifier = Modifier
+                        .size(64.dp)
+                )
+            }
+            Spacer(modifier = Modifier.size(16.dp))
+            Text(
+                modifier = Modifier
+                    .testTag(TestIds.Main.PROFILE_NAME)
+                    .weight(1f),
+                text = state.name,
+                style = MaterialTheme.typography.titleMedium
+            )
+
+            Button(
+                modifier = Modifier
+                    .testTag(TestIds.Main.LOGOUT_BUTTON),
+                onClick = onLogout,
+                colors = ButtonDefaults.buttonColors(
+                    contentColor = MaterialTheme.colorScheme.errorContainer,
+                    containerColor = MaterialTheme.colorScheme.onErrorContainer
+
+                )
+
+            ) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Text("Выход")
+                    Spacer(modifier = Modifier.size(8.dp))
+                    Icon(
+                        painter = painterResource(R.drawable.ic_logout),
+                        contentDescription = "Выйти"
+                    )
+                }
+
+            }
+
+        }
+
+        Spacer(modifier = Modifier.size(24.dp))
+
+        Text(
+            text = stringResource(R.string.main_screen_title),
+            style = MaterialTheme.typography.titleLarge.copy(
+                fontWeight = FontWeight.Bold
+            )
+        )
+
+        Spacer(modifier = Modifier.size(20.dp))
+
+        LazyColumn(
+            verticalArrangement = Arrangement.spacedBy(8.dp)
+        ) {
+            itemsIndexed(state.bookings, key = { _, item -> item.id }) { index, item ->
+                Card(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .testTag(TestIds.Main.getIdItemByPosition(index))
+                ) {
+                    Column(
+                        modifier = Modifier.padding(12.dp)
+                    ) {
+                        Row(modifier = Modifier.fillMaxWidth(),
+                            horizontalArrangement = Arrangement.SpaceBetween,
+                            verticalAlignment = Alignment.CenterVertically) {
+                            Text(
+                                text = stringResource(R.string.main_screen_date),
+                                style = MaterialTheme.typography.bodyLarge.copy(
+                                    fontWeight = FontWeight.Bold
+                                )
+                            )
+
+                            Text(
+                                    modifier = Modifier.testTag(TestIds.Main.ITEM_DATE),
+                            text = item.dateLabel,
+                            style = MaterialTheme.typography.bodyLarge.copy(
+                                fontWeight = FontWeight.Bold
+                            )
+                            )
+                        }
+                        Row(
+                            modifier = Modifier.fillMaxWidth(),
+                            horizontalArrangement = Arrangement.SpaceBetween,
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            Text(
+                                text = stringResource(R.string.main_screen_place),
+                                style = MaterialTheme.typography.bodyMedium
+                            )
+
+                            Text(
+                                modifier = Modifier.testTag(TestIds.Main.ITEM_PLACE),
+                                text = item.roomName,
+                                style = MaterialTheme.typography.bodyMedium
+                            )
+                        }
+
+                    }
+                }
+            }
+        }
+
+        Spacer(modifier = Modifier.size(16.dp))
+
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween
+        ) {
+            Button(
+                modifier = Modifier.testTag(TestIds.Main.REFRESH_BUTTON),
+                onClick = onRefresh
+            ) { Row(
+                horizontalArrangement = Arrangement.Center,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(text = stringResource(R.string.main_screen_refresh))
+                Spacer(modifier = Modifier.size(8.dp))
+                Icon(
+                    painter = painterResource(R.drawable.ic_refresh),
+                    contentDescription = "Обновить"
+                )
+            }
+
+            }
+            Button(
+                modifier = Modifier.testTag(TestIds.Main.ADD_BUTTON),
+                onClick = onAddBooking
+            ) { Row(
+                horizontalArrangement = Arrangement.Center,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(text = stringResource(R.string.main_screen_new_book))
+                Spacer(modifier = Modifier.size(8.dp))
+                Icon(
+                    painter = painterResource(R.drawable.ic_add),
+                    contentDescription = "Новая бронь"
+                )
+            }
+
+            }
+        }
+    }
+}
+@Composable
+private fun UserAvatar(
+    photoUrl: String?,
+    modifier: Modifier = Modifier,
+) {
+    if (photoUrl.isNullOrBlank()) {
+        // Фолбек на старый смайл / иконку
+        Image(
+            imageVector = Icons.Default.Person,
+            contentDescription = null,
+            modifier = modifier
+                .size(64.dp)
+                .clip(CircleShape),
+        )
+    } else {
+        SubcomposeAsyncImage(
+            model = photoUrl,
+            contentDescription = null,
+            modifier = modifier
+                .size(64.dp)
+                .clip(CircleShape),
+            contentScale = ContentScale.Crop,
+            loading = {
+                Image(
+                    imageVector = Icons.Default.Person,
+                    contentDescription = null,
+                    modifier = Modifier.size(64.dp),
+                )
+            },
+            error = {
+                Image(
+                    imageVector = Icons.Default.Person,
+                    contentDescription = null,
+                    modifier = Modifier.size(64.dp),
+                )
+            }
+        )
+    }
+}

app/src/main/java/ru/myitschool/work/ui/screen/main/MainState.kt

@@ -0,0 +1,21 @@
+package ru.myitschool.work.ui.screen.main
+
+data class MainBookingItem(
+    val id: Int,
+    val dateLabel: String,
+    val roomName: String,
+)
+
+sealed interface MainState {
+    object Loading : MainState
+
+    data class Data(
+        val name: String,
+        val photoUrl: String?,
+        val bookings: List<MainBookingItem>,
+    ) : MainState
+
+    data class Error(
+        val message: String,
+    ) : MainState
+}

app/src/main/java/ru/myitschool/work/ui/screen/main/MainViewModel.kt

@@ -0,0 +1,91 @@
+package ru.myitschool.work.ui.screen.main
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import java.time.LocalDate
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import ru.myitschool.work.core.DateUtils
+import ru.myitschool.work.data.repo.AuthRepository
+import ru.myitschool.work.data.repo.UserRepository
+import ru.myitschool.work.domain.auth.ClearAuthDataUseCase
+import ru.myitschool.work.domain.user.GetUserInfoUseCase
+
+class MainViewModel : ViewModel() {
+
+    private val getUserInfoUseCase by lazy { GetUserInfoUseCase(UserRepository) }
+    private val clearAuthDataUseCase by lazy { ClearAuthDataUseCase(AuthRepository) }
+
+    private val _uiState = MutableStateFlow<MainState>(MainState.Loading)
+    val uiState: StateFlow<MainState> = _uiState.asStateFlow()
+
+    sealed interface Action {
+        data object NavigateToAuth : Action
+        data object NavigateToBooking : Action
+    }
+
+    private val _actionFlow = MutableSharedFlow<Action>()
+    val actionFlow: SharedFlow<Action> = _actionFlow
+
+    fun onIntent(intent: MainIntent) {
+        when (intent) {
+            MainIntent.Load,
+            MainIntent.Refresh -> {
+                load()
+            }
+
+            MainIntent.Logout -> {
+                viewModelScope.launch(Dispatchers.Default) {
+                    clearAuthDataUseCase()
+                    _actionFlow.emit(Action.NavigateToAuth)
+                }
+            }
+
+            MainIntent.AddBooking -> {
+                viewModelScope.launch {
+                    _actionFlow.emit(Action.NavigateToBooking)
+                }
+            }
+        }
+    }
+
+    private fun load() {
+        viewModelScope.launch(Dispatchers.Default) {
+            _uiState.value = MainState.Loading
+            getUserInfoUseCase()
+                .fold(
+                    onSuccess = { user ->
+                        val bookings = user.bookings
+                            .sortedWith(
+                                compareBy { booking ->
+                                    DateUtils.parseDate(booking.time) ?: LocalDate.MAX
+                                }
+                            )
+                            .mapIndexed { index, booking ->
+                                MainBookingItem(
+                                    id = index,
+                                    dateLabel = DateUtils.formatForMain(booking.time),
+                                    roomName = booking.roomName,
+                                )
+                            }
+
+                        _uiState.value = MainState.Data(
+                            name = user.name,
+                            photoUrl = user.photoUrl,
+                            bookings = bookings,
+                        )
+                    },
+                    onFailure = { error ->
+                        _uiState.value = MainState.Error(
+                            message = error.message ?: "Ошибка загрузки данных",
+                        )
+                    }
+                )
+        }
+    }
+}

app/src/main/java/ru/myitschool/work/ui/theme/Theme.kt

@@ -32,26 +32,26 @@ private val LightColorScheme = lightColorScheme(
     */
 )
 
-@Composable
-fun WorkTheme(
-    darkTheme: Boolean = isSystemInDarkTheme(),
-    // Dynamic color is available on Android 12+
-    dynamicColor: Boolean = true,
-    content: @Composable () -> Unit
-) {
-    val colorScheme = when {
-        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
-            val context = LocalContext.current
-            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+    @Composable
+    fun WorkTheme(
+        darkTheme: Boolean = isSystemInDarkTheme(),
+        // Dynamic color is available on Android 12+
+        dynamicColor: Boolean = true,
+        content: @Composable () -> Unit
+    ) {
+        val colorScheme = when {
+            dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+                val context = LocalContext.current
+                if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+            }
+
+            darkTheme -> DarkColorScheme
+            else -> LightColorScheme
         }
 
-        darkTheme -> DarkColorScheme
-        else -> LightColorScheme
+        MaterialTheme(
+            colorScheme = colorScheme,
+            typography = Typography,
+            content = content
+        )
     }
-
-    MaterialTheme(
-        colorScheme = colorScheme,
-        typography = Typography,
-        content = content
-    )
-}

app/src/main/res/drawable/ic_add.xml

@@ -0,0 +1,14 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="16dp"
+    android:height="16dp"
+    android:viewportWidth="16"
+    android:viewportHeight="16">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M0.5,8.5v-1h15v1Z"
+      android:fillType="evenOdd"/>
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M8.5,15.5h-1V0.5h1Z"
+      android:fillType="evenOdd"/>
+</vector>

app/src/main/res/drawable/ic_arrow_right.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="16dp" android:viewportHeight="24" android:viewportWidth="24" android:width="16dp">
+      
+    <path android:fillColor="#FF000000" android:pathData="M11.293,4.707l6.293,6.293l-13.586,0l0,2l13.586,0l-6.293,6.293l1.414,1.414l8.707,-8.707l-8.707,-8.707l-1.414,1.414z"/>
+    
+</vector>

app/src/main/res/drawable/ic_back.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="16dp"
+    android:height="16dp"
+    android:viewportWidth="16"
+    android:viewportHeight="16">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M11.62,3.81l-4.19,4.19l4.19,4.19l-1.53,1.52l-5.71,-5.71l5.71,-5.71l1.53,1.52z"/>
+</vector>

app/src/main/res/drawable/ic_logout.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="16dp" android:viewportHeight="32" android:viewportWidth="32" android:width="16dp">
+      
+    <path android:fillColor="#FF000000" android:pathData="M27.9,2.58a0.86,0.86 0,0 0,-0.07 -0.1,0.71 0.71,0 0,0 -0.19,-0.23l0,0 -0.09,0a1.12,1.12 0,0 0,-0.25 -0.11L27.1,2 27,2H12a1,1 0,0 0,-1 1V9a1,1 0,0 0,2 0V4h7.19L16.71,5A1,1 0,0 0,16 6V25H13V22a1,1 0,0 0,-2 0v4a1,1 0,0 0,1 1h4v2a1,1 0,0 0,0.4 0.8,1 1,0 0,0 0.6,0.2 1,1 0,0 0,0.29 0l10,-3A1,1 0,0 0,28 26V3A1,1 0,0 0,27.9 2.58ZM26,25.26l-8,2.4V6.74l8,-2.4Z"/>
+      
+    <path android:fillColor="#FF000000" android:pathData="M7.41,17H14a1,1 0,0 0,0 -2H7.41l1.3,-1.29a1,1 0,0 0,-1.42 -1.42l-3,3a1,1 0,0 0,-0.21 0.33,1 1,0 0,0 0,0.76 1,1 0,0 0,0.21 0.33l3,3a1,1 0,0 0,1.42 0,1 1,0 0,0 0,-1.42Z"/>
+      
+    <path android:fillColor="#FF000000" android:pathData="M20,17a1,1 0,0 0,0 -2h0a1,1 0,1 0,0 2Z"/>
+    
+</vector>

app/src/main/res/drawable/ic_refresh.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="16dp" android:viewportHeight="24" android:viewportWidth="24" android:width="16dp">
+      
+    <path android:fillColor="#FF000000" android:pathData="M12,3A8.959,8.959 0,0 0,5 6.339V4H3v6H9V8H6.274A6.982,6.982 0,1 1,5.22 13.751l-1.936,0.5A9,9 0,1 0,12 3Z"/>
+    
+</vector>

app/src/main/res/values/strings.xml

@@ -1,7 +1,15 @@
 <resources>
     <string name="app_name">Work</string>
     <string name="title_activity_root">RootActivity</string>
-    <string name="auth_title">Привет! Введи код для авторизации</string>
+    <string name="auth_name">Система бронирования</string>
+    <string name="auth_title">Вход в систему</string>
     <string name="auth_label">Код</string>
     <string name="auth_sign_in">Войти</string>
+    <string name="main_screen_date">Дата:</string>
+    <string name="main_screen_place">Место:</string>
+    <string name="main_screen_title">Мои бронирования</string>
+    <string name="main_screen_refresh">Обновить</string>
+    <string name="main_screen_new_book">Новая бронь</string>
+    <string name="book_screen_book">Забронировать</string>
+    <string name="book_screen_back">Назад</string>
 </resources>

build.gradle.kts

@@ -1,7 +1,9 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
-    androidApplication version Version.agp apply false
-    kotlinJvm version Version.Kotlin.language apply false
-    kotlinAndroid version Version.Kotlin.language apply false
-    composeCompiler version Version.Kotlin.language apply false
+//    id("com.android.application") version "8.5.2" apply false
+    id("com.android.application") version "8.6.0" apply false
+
+    id("org.jetbrains.kotlin.android") version "2.2.20" apply false
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.2.20" apply false
+    id("org.jetbrains.kotlin.plugin.compose") version "2.2.20" apply false
 }

gradle.properties

@@ -1,21 +1,16 @@
-# Project-wide Gradle settings.
-# IDE (e.g. Android Studio) users:
-# Gradle settings configured through the IDE *will override*
-# any settings specified in this file.
-# For more details on how to configure your build environment visit
+## For more details on how to configure your build environment visit
 # http://www.gradle.org/docs/current/userguide/build_environment.html
+#
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
-org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# Default value: -Xmx1024m -XX:MaxPermSize=256m
+# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+#
 # When configured, Gradle will run in incubating parallel mode.
-# This option should only be used with decoupled projects. More details, visit
-# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# This option should only be used with decoupled projects. For more details, visit
+# https://developer.android.com/r/tools/gradle-multi-project-decoupled-projects
 # org.gradle.parallel=true
-# AndroidX package structure to make it clearer which packages are bundled with the
-# Android operating system, and which are packaged with your app's APK
-# https://developer.android.com/topic/libraries/support-library/androidx-rn
-android.useAndroidX=true
-# Enables namespacing of each library's R class so that its R class includes only the
-# resources declared in the library itself and none from the library's dependencies,
-# thereby reducing the size of the R class for that library
+#Thu Dec 04 14:16:52 GMT+07:00 2025
 android.nonTransitiveRClass=true
+android.useAndroidX=true
+org.gradle.jvmargs=-Xmx2048M -Dkotlin.daemon.jvm.options\="-Xmx2048M" -Dfile.encoding\=UTF-8

gradlew

@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
 #
@@ -55,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,13 +82,11 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -133,22 +133,29 @@ location of your Java installation."
     fi
 else
     JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -193,11 +200,15 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
@@ -205,6 +216,12 @@ set -- \
         org.gradle.wrapper.GradleWrapperMain \
         "$@"
 
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
 # Use "xargs" to parse quoted args.
 #
 # With -n1 it outputs one arg per line, with the quotes and backslashes removed.

gradlew.bat

@@ -13,8 +13,10 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
 
-@if "%DEBUG%" == "" @echo off
+@if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
 @rem  Gradle startup script for Windows
@@ -25,7 +27,8 @@
 if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
@@ -40,13 +43,13 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto execute
+if %ERRORLEVEL% equ 0 goto execute
 
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -56,11 +59,11 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -75,13 +78,15 @@ set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal