feat: implement 72-hour JWT token refresh for daily notification plugin

- Add accessTokenForBackground() with 72-hour default expiration
  - Supports offline-first prefetch operations
  - Balances security with offline capability

- Implement proactive token refresh strategy
  - Refresh on component mount (DailyNotificationSection)
  - Refresh on app resume (Capacitor 'resume' event)
  - Refresh when notifications are enabled
  - Automatic refresh without user interaction

- Update CapacitorPlatformService.configureNativeFetcher()
  - Automatically retrieves activeDid from database
  - Generates 72-hour JWT tokens for background operations
  - Includes starred plans in configuration

- Add BroadcastReceivers to AndroidManifest.xml
  - DailyNotificationReceiver for scheduled notifications
  - BootReceiver for rescheduling after device reboot

- Add comprehensive documentation
  - JSDoc comments for all token-related functions
  - Inline comments explaining refresh strategy
  - Documentation section on authentication & token management

Benefits:
- No app wake-up required (refresh when app already open)
- Works offline (72-hour validity supports extended periods)
- Automatic (no user interaction required)
- Graceful degradation (uses cached content if refresh fails)

android/app/src/main/AndroidManifest.xml

@@ -36,6 +36,30 @@
             android:grantUriPermissions="true">
             <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths" />
         </provider>
+
+        <!-- Daily Notification Plugin Receivers -->
+        <receiver
+            android:name="com.timesafari.dailynotification.DailyNotificationReceiver"
+            android:enabled="true"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="com.timesafari.daily.NOTIFICATION" />
+            </intent-filter>
+        </receiver>
+        <receiver
+            android:name="com.timesafari.dailynotification.BootReceiver"
+            android:directBootAware="true"
+            android:enabled="true"
+            android:exported="true">
+            <intent-filter android:priority="1000">
+                <!-- Delivered very early after reboot (before unlock) -->
+                <action android:name="android.intent.action.LOCKED_BOOT_COMPLETED" />
+                <!-- Delivered after the user unlocks / credential-encrypted storage is available -->
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+                <!-- Delivered after app update; great for rescheduling alarms without reboot -->
+                <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
+            </intent-filter>
+        </receiver>
     </application>
 
     <!-- Permissions -->

android/app/src/main/assets/capacitor.plugins.json

@@ -35,10 +35,6 @@
 		"pkg": "@capawesome/capacitor-file-picker",
 		"classpath": "io.capawesome.capacitorjs.plugins.filepicker.FilePickerPlugin"
 	},
-	{
-		"pkg": "@timesafari/daily-notification-plugin",
-		"classpath": "com.timesafari.dailynotification.DailyNotificationPlugin"
-	},
 	{
 		"pkg": "@timesafari/daily-notification-plugin",
 		"classpath": "com.timesafari.dailynotification.DailyNotificationPlugin"