Stage 5: History, the shared daily Streak and Reminders

- Streak computed from all complete Sessions: Grace Hour (00:00-01:00
  counts for yesterday unless it is done), a Freeze per 7 Streak Days
  (max 2) spent automatically on a missed day (ADR 0006)
- Top bar flame (grey until today is done) opening a panel with current
  and longest Streak, Freezes and a month calendar; 'Day N of your
  streak' on a fresh summary
- History per Mode grouped by day, reopening each summary
- Two adjustable Reminders (19:00, 22:30) scheduled 14 days ahead with
  flutter_local_notifications, none on a done day; permission asked
  after the first complete Session or from Settings
- Settings: Reminders, the Player chime, exercise credits

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pubspec.lock

@@ -249,6 +249,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.2.8"
+  equatable:
+    dependency: transitive
+    description:
+      name: equatable
+      sha256: ea36e500cbf0ec18361deabca755434f73e42fe53c5130021c7e2d6b5ebe1702
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
   fake_async:
     dependency: transitive
     description:
@@ -294,6 +302,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.0.0"
+  flutter_local_notifications:
+    dependency: "direct main"
+    description:
+      name: flutter_local_notifications
+      sha256: "2b50e938a275e1ad77352d6a25e25770f4130baa61eaf02de7a9a884680954ad"
+      url: "https://pub.dev"
+    source: hosted
+    version: "20.1.0"
+  flutter_local_notifications_linux:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_linux
+      sha256: dce0116868cedd2cdf768af0365fc37ff1cbef7c02c4f51d0587482e625868d0
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
+  flutter_local_notifications_platform_interface:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_platform_interface
+      sha256: "23de31678a48c084169d7ae95866df9de5c9d2a44be3e5915a2ff067aeeba899"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.0.0"
+  flutter_local_notifications_windows:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_windows
+      sha256: e97a1a3016512437d9c0b12fae7d1491c3c7b9aa7f03a69b974308840656b02a
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
   flutter_localizations:
     dependency: "direct main"
     description: flutter
@@ -304,6 +344,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_timezone:
+    dependency: "direct main"
+    description:
+      name: flutter_timezone
+      sha256: "7830bc64bef0b003468fc1f58fc3f3faf54817f8cd6e68fa818b306560410d68"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.1.1"
   flutter_web_plugins:
     dependency: transitive
     description: flutter
@@ -770,6 +818,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.4"
+  timezone:
+    dependency: "direct main"
+    description:
+      name: timezone
+      sha256: dd14a3b83cfd7cb19e7888f1cbc20f258b8d71b54c06f79ac585f14093a287d1
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.1"
   typed_data:
     dependency: transitive
     description:
@@ -884,4 +940,4 @@ packages:
     version: "3.1.4"
 sdks:
   dart: ">=3.8.1 <4.0.0"
-  flutter: ">=3.29.0"
+  flutter: ">=3.32.0"