feat: add local-first private AI digest workflow

Migrate app code into canonical feature slices, add phone-only AI digest scheduling and review, wire local notification/background task support, and cover the flow with tests.

pubspec.lock

@@ -33,6 +33,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.13.0"
+  battery_plus:
+    dependency: "direct main"
+    description:
+      name: battery_plus
+      sha256: ad16fcb55b7384be6b4bbc763d5e2031ac7ea62b2d9b6b661490c7b9741155bf
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
+  battery_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: battery_plus_platform_interface
+      sha256: e8342c0f32de4b1dfd0223114b6785e48e579bfc398da9471c9179b907fa4910
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -608,6 +624,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.2.0"
+  package_info_plus:
+    dependency: transitive
+    description:
+      name: package_info_plus
+      sha256: "468c26b4254ab01979fa5e4a98cb343ea3631b9acee6f21028997419a80e1a20"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.0.1"
+  package_info_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: package_info_plus_platform_interface
+      sha256: "202a487f08836a592a6bd4f901ac69b3a8f146af552bbd14407b6b41e1c3f086"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
   path:
     dependency: transitive
     description:
@@ -744,6 +776,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.2.1"
+  sentry:
+    dependency: transitive
+    description:
+      name: sentry
+      sha256: "599701ca0693a74da361bc780b0752e1abc98226cf5095f6b069648116c896bb"
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.14.2"
+  sentry_flutter:
+    dependency: "direct main"
+    description:
+      name: sentry_flutter
+      sha256: "5ba2cf40646a77d113b37a07bd69f61bb3ec8a73cbabe5537b05a7c89d2656f8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.14.2"
   shared_preferences:
     dependency: "direct main"
     description:
@@ -965,6 +1013,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  upower:
+    dependency: transitive
+    description:
+      name: upower
+      sha256: cf042403154751180affa1d15614db7fa50234bc2373cd21c3db666c38543ebf
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.0"
   uri:
     dependency: transitive
     description:
@@ -1045,6 +1101,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.15.0"
+  workmanager:
+    dependency: "direct main"
+    description:
+      name: workmanager
+      sha256: "065673b2a465865183093806925419d311a9a5e0995aa74ccf8920fd695e2d10"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.0+3"
+  workmanager_android:
+    dependency: transitive
+    description:
+      name: workmanager_android
+      sha256: "9ae744db4ef891f5fcd2fb8671fccc712f4f96489a487a1411e0c8675e5e8cb7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.0+2"
+  workmanager_apple:
+    dependency: transitive
+    description:
+      name: workmanager_apple
+      sha256: "1cc12ae3cbf5535e72f7ba4fde0c12dd11b757caf493a28e22d684052701f2ca"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.1+2"
+  workmanager_platform_interface:
+    dependency: transitive
+    description:
+      name: workmanager_platform_interface
+      sha256: f40422f10b970c67abb84230b44da22b075147637532ac501729256fcea10a47
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.1+1"
   xdg_directories:
     dependency: transitive
     description: