Add haptic feedback, rich task completion, and Google Sign-In preparation

- Add platform haptic feedback abstraction (HapticFeedback.kt) with
  implementations for Android, iOS, JVM, JS, and WASM
- Enhance CompleteTaskDialog with interactive 5-star rating, image
  thumbnails, and haptic feedback
- Add ImageBitmap platform abstraction for displaying selected images
- Localize TaskTemplatesBrowserSheet with string resources
- Add Android widgets infrastructure (small, medium, large sizes)
- Add Google Sign-In button components and auth flow preparation
- Update strings.xml with new localization keys for completions,
  templates, and document features
- Integrate haptic feedback into ThemePickerDialog

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

composeApp/build.gradle.kts

@@ -56,6 +56,18 @@ kotlin {
 
             // PostHog Analytics
             implementation("com.posthog:posthog-android:3.8.2")
+
+            // Google Sign In - Credential Manager
+            implementation("androidx.credentials:credentials:1.3.0")
+            implementation("androidx.credentials:credentials-play-services-auth:1.3.0")
+            implementation("com.google.android.libraries.identity.googleid:googleid:1.1.1")
+
+            // Jetpack Glance for Home Screen Widgets
+            implementation("androidx.glance:glance-appwidget:1.1.1")
+            implementation("androidx.glance:glance-material3:1.1.1")
+
+            // DataStore for widget data persistence
+            implementation("androidx.datastore:datastore-preferences:1.1.1")
         }
         iosMain.dependencies {
             implementation(libs.ktor.client.darwin)