Refactor DashboardOverlay: Split 1483-line file into modular components

- Created new dashboard/ package with 6 focused files:
  - DashboardOverlay.kt (container, ~250 lines)
  - DashboardComponents.kt (shared UI components, dialogs, sliders)
  - LiveViewContent.kt (Tab 1: human detection list)
  - RadarViewContent.kt (Tab 2: radar canvas visualization)
  - KnownFacesContent.kt (Tab 3: face management)
  - PerceptionSettingsContent.kt (Tab 4: settings sliders)
- Deleted old monolithic DashboardOverlay.kt
- Updated imports in MainScreen, ChatViewModel, FaceManager

Author: studerus

app/src/main/java/ch/fhnw/pepper_realtime/manager/FaceManager.kt

@@ -1,8 +1,8 @@
 package ch.fhnw.pepper_realtime.manager
 
 import ch.fhnw.pepper_realtime.service.LocalFaceRecognitionService
-import ch.fhnw.pepper_realtime.ui.compose.FaceManagementState
-import ch.fhnw.pepper_realtime.ui.compose.PerceptionSettingsState
+import ch.fhnw.pepper_realtime.ui.compose.dashboard.FaceManagementState
+import ch.fhnw.pepper_realtime.ui.compose.dashboard.PerceptionSettingsState
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow

app/src/main/java/ch/fhnw/pepper_realtime/ui/ChatViewModel.kt

@@ -26,8 +26,8 @@ import ch.fhnw.pepper_realtime.data.RulePersistence
 import ch.fhnw.pepper_realtime.data.EventRule
 import ch.fhnw.pepper_realtime.data.MatchedRule
 import ch.fhnw.pepper_realtime.data.RuleActionType
-import ch.fhnw.pepper_realtime.ui.compose.FaceManagementState
-import ch.fhnw.pepper_realtime.ui.compose.PerceptionSettingsState
+import ch.fhnw.pepper_realtime.ui.compose.dashboard.FaceManagementState
+import ch.fhnw.pepper_realtime.ui.compose.dashboard.PerceptionSettingsState
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import ch.fhnw.pepper_realtime.network.WebSocketConnectionCallback

app/src/main/java/ch/fhnw/pepper_realtime/ui/compose/DashboardOverlay.kt

@@ -35,6 +35,7 @@ import ch.fhnw.pepper_realtime.ui.compose.games.MelodyPlayerDialog
 import ch.fhnw.pepper_realtime.ui.compose.games.QuizDialog
 import ch.fhnw.pepper_realtime.ui.compose.games.TicTacToeDialog
 import ch.fhnw.pepper_realtime.ui.compose.settings.SettingsScreen
+import ch.fhnw.pepper_realtime.ui.compose.dashboard.DashboardOverlay
 import ch.fhnw.pepper_realtime.ui.settings.SettingsViewModel
 import ch.fhnw.pepper_realtime.tools.ToolRegistry
 import kotlinx.coroutines.launch