Initial commit: Fabled Android app

Flutter Android client for FabledAssistant with:
- Session-cookie auth via persistent cookie jar (Dio + cookie_jar)
- OAuth/SSO login via in-app WebView (flutter_inappwebview)
- Notes: list, detail (markdown render), create/edit
- Tasks: list with status tabs, create/edit with priority
- Chat: SSE streaming bubbles, conversation management
- Quick Capture FAB for rapid note/task creation
- Settings screen (change server URL, logout)
- Android home screen widget → opens chat
- Riverpod state management, go_router navigation

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

android/app/src/main/kotlin/com/fabledapp/fabled_app/ChatWidgetProvider.kt

@@ -0,0 +1,43 @@
+package com.fabledapp.fabled_app
+
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProvider
+import android.content.Context
+import android.content.Intent
+import android.app.PendingIntent
+import android.widget.RemoteViews
+
+class ChatWidgetProvider : AppWidgetProvider() {
+    override fun onUpdate(
+        context: Context,
+        appWidgetManager: AppWidgetManager,
+        appWidgetIds: IntArray
+    ) {
+        for (widgetId in appWidgetIds) {
+            updateWidget(context, appWidgetManager, widgetId)
+        }
+    }
+
+    private fun updateWidget(
+        context: Context,
+        appWidgetManager: AppWidgetManager,
+        widgetId: Int
+    ) {
+        val intent = Intent(context, MainActivity::class.java).apply {
+            action = "com.fabledapp.OPEN_CHAT"
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
+        }
+
+        val pendingIntent = PendingIntent.getActivity(
+            context,
+            0,
+            intent,
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+
+        val views = RemoteViews(context.packageName, R.layout.chat_widget_layout)
+        views.setOnClickPendingIntent(R.id.widget_root, pendingIntent)
+
+        appWidgetManager.updateAppWidget(widgetId, views)
+    }
+}

android/app/src/main/kotlin/com/fabledapp/fabled_app/MainActivity.kt

@@ -0,0 +1,19 @@
+package com.fabledapp.fabled_app
+
+import io.flutter.embedding.android.FlutterActivity
+import io.flutter.embedding.engine.FlutterEngine
+import io.flutter.plugin.common.MethodChannel
+
+class MainActivity : FlutterActivity() {
+    private val channelName = "com.fabledapp.fabled_app/widget"
+
+    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
+        super.configureFlutterEngine(flutterEngine)
+
+        // If the app was launched by the home screen widget, notify Flutter.
+        if (intent?.action == "com.fabledapp.OPEN_CHAT") {
+            MethodChannel(flutterEngine.dartExecutor.binaryMessenger, channelName)
+                .invokeMethod("openChat", null)
+        }
+    }
+}