feat(todo): reminders on the device, Upcoming's week strip, the task pane and search (ADR 0033, D2, D5, D8)

A task with a time takes reminders, minutes before it, in its sealed
payload; each device plans the coming ones whenever the tasks change and
schedules them with the system through flutter_local_notifications
(Android, iOS, macOS, Windows; on Linux the running app shows them), at
the minute where Android allows exact alarms. Notifying is asked for
when a task first gets a reminder; signing out or switching person
cancels them. Upcoming gets its week strip: the month opening
Material's calendar, the weeks before and after, a dot under each day
with tasks; a day picked scrolls the agenda to it, and scrolling moves
the strip along. From expanded windows on, a task opens in a pane
beside the list rather than in a dialog. Search, from every tab's app
bar, finds projects by name and tasks by every word typed, in their
title, description or labels, whatever the case and accents, on the
device alone.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

apps/todo/halkyon_todo_flutter/lib/l10n/app_de.arb

@@ -119,5 +119,23 @@
   "repeatEnds": "Endet",
   "repeatEndsNever": "Nie",
   "repeatEndsOn": "An einem Tag",
-  "repeatEndsAfter": "{count, plural, =1{Nach einem Mal} other{Nach {count} Malen}}"
+  "repeatEndsAfter": "{count, plural, =1{Nach einem Mal} other{Nach {count} Malen}}",
+  "remindersTitle": "Erinnerungen",
+  "remindersNone": "Keine Erinnerungen",
+  "reminderAtTime": "Zur Uhrzeit",
+  "reminderMinutesBefore": "{count, plural, =1{1 Minute vorher} other{{count} Minuten vorher}}",
+  "reminderHoursBefore": "{count, plural, =1{1 Stunde vorher} other{{count} Stunden vorher}}",
+  "reminderDaysBefore": "{count, plural, =1{1 Tag vorher} other{{count} Tage vorher}}",
+  "reminderDue": "Fällig um {time}",
+  "remindersChannel": "Erinnerungen an Aufgaben",
+  "remindersNotAllowed": "Benachrichtigungen sind für Halkyon Todo aus: Erinnerungen erscheinen, sobald du sie in den Systemeinstellungen erlaubst.",
+  "remindersOnThisDevice": "Erinnerungen kommen auf jedem deiner Geräte, das deine Aufgaben öffnet.",
+  "weekPrevious": "Vorige Woche",
+  "weekNext": "Folgende Woche",
+  "searchTitle": "Suchen",
+  "searchHint": "Aufgaben und Projekte suchen",
+  "searchEmpty": "Finde eine Aufgabe über die Wörter in ihrem Titel, ihrer Beschreibung oder ihren Labels. Die Suche läuft auf diesem Gerät: deine Instanz kann deine Aufgaben nicht lesen.",
+  "searchNone": "Nichts gefunden für „{query}“.",
+  "searchProjects": "Projekte",
+  "searchTasks": "Aufgaben"
 }

apps/todo/halkyon_todo_flutter/lib/l10n/app_en.arb

@@ -144,5 +144,28 @@
   "repeatEndsNever": "Never",
   "repeatEndsOn": "On a day",
   "repeatEndsAfter": "{count, plural, =1{After once} other{After {count} times}}",
-  "@repeatEndsAfter": {"placeholders": {"count": {"type": "int"}}}
+  "@repeatEndsAfter": {"placeholders": {"count": {"type": "int"}}},
+  "remindersTitle": "Reminders",
+  "remindersNone": "No reminders",
+  "reminderAtTime": "At its time",
+  "reminderMinutesBefore": "{count, plural, =1{1 minute before} other{{count} minutes before}}",
+  "@reminderMinutesBefore": {"placeholders": {"count": {"type": "int"}}},
+  "reminderHoursBefore": "{count, plural, =1{1 hour before} other{{count} hours before}}",
+  "@reminderHoursBefore": {"placeholders": {"count": {"type": "int"}}},
+  "reminderDaysBefore": "{count, plural, =1{1 day before} other{{count} days before}}",
+  "@reminderDaysBefore": {"placeholders": {"count": {"type": "int"}}},
+  "reminderDue": "Due at {time}",
+  "@reminderDue": {"placeholders": {"time": {"type": "String"}}},
+  "remindersChannel": "Task reminders",
+  "remindersNotAllowed": "Notifications are off for Halkyon Todo: reminders show once you allow them in the system's settings.",
+  "remindersOnThisDevice": "Reminders come on each of your devices that opens your tasks.",
+  "weekPrevious": "Previous week",
+  "weekNext": "Following week",
+  "searchTitle": "Search",
+  "searchHint": "Search tasks and projects",
+  "searchEmpty": "Find a task by the words in its title, its description or its labels. Search runs on this device: your instance can't read your tasks.",
+  "searchNone": "Nothing found for “{query}”.",
+  "@searchNone": {"placeholders": {"query": {"type": "String"}}},
+  "searchProjects": "Projects",
+  "searchTasks": "Tasks"
 }

apps/todo/halkyon_todo_flutter/lib/l10n/app_localizations.dart

@@ -783,6 +783,114 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'{count, plural, =1{After once} other{After {count} times}}'**
   String repeatEndsAfter(int count);
+
+  /// No description provided for @remindersTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Reminders'**
+  String get remindersTitle;
+
+  /// No description provided for @remindersNone.
+  ///
+  /// In en, this message translates to:
+  /// **'No reminders'**
+  String get remindersNone;
+
+  /// No description provided for @reminderAtTime.
+  ///
+  /// In en, this message translates to:
+  /// **'At its time'**
+  String get reminderAtTime;
+
+  /// No description provided for @reminderMinutesBefore.
+  ///
+  /// In en, this message translates to:
+  /// **'{count, plural, =1{1 minute before} other{{count} minutes before}}'**
+  String reminderMinutesBefore(int count);
+
+  /// No description provided for @reminderHoursBefore.
+  ///
+  /// In en, this message translates to:
+  /// **'{count, plural, =1{1 hour before} other{{count} hours before}}'**
+  String reminderHoursBefore(int count);
+
+  /// No description provided for @reminderDaysBefore.
+  ///
+  /// In en, this message translates to:
+  /// **'{count, plural, =1{1 day before} other{{count} days before}}'**
+  String reminderDaysBefore(int count);
+
+  /// No description provided for @reminderDue.
+  ///
+  /// In en, this message translates to:
+  /// **'Due at {time}'**
+  String reminderDue(String time);
+
+  /// No description provided for @remindersChannel.
+  ///
+  /// In en, this message translates to:
+  /// **'Task reminders'**
+  String get remindersChannel;
+
+  /// No description provided for @remindersNotAllowed.
+  ///
+  /// In en, this message translates to:
+  /// **'Notifications are off for Halkyon Todo: reminders show once you allow them in the system\'s settings.'**
+  String get remindersNotAllowed;
+
+  /// No description provided for @remindersOnThisDevice.
+  ///
+  /// In en, this message translates to:
+  /// **'Reminders come on each of your devices that opens your tasks.'**
+  String get remindersOnThisDevice;
+
+  /// No description provided for @weekPrevious.
+  ///
+  /// In en, this message translates to:
+  /// **'Previous week'**
+  String get weekPrevious;
+
+  /// No description provided for @weekNext.
+  ///
+  /// In en, this message translates to:
+  /// **'Following week'**
+  String get weekNext;
+
+  /// No description provided for @searchTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Search'**
+  String get searchTitle;
+
+  /// No description provided for @searchHint.
+  ///
+  /// In en, this message translates to:
+  /// **'Search tasks and projects'**
+  String get searchHint;
+
+  /// No description provided for @searchEmpty.
+  ///
+  /// In en, this message translates to:
+  /// **'Find a task by the words in its title, its description or its labels. Search runs on this device: your instance can\'t read your tasks.'**
+  String get searchEmpty;
+
+  /// No description provided for @searchNone.
+  ///
+  /// In en, this message translates to:
+  /// **'Nothing found for “{query}”.'**
+  String searchNone(String query);
+
+  /// No description provided for @searchProjects.
+  ///
+  /// In en, this message translates to:
+  /// **'Projects'**
+  String get searchProjects;
+
+  /// No description provided for @searchTasks.
+  ///
+  /// In en, this message translates to:
+  /// **'Tasks'**
+  String get searchTasks;
 }
 
 class _AppLocalizationsDelegate

apps/todo/halkyon_todo_flutter/lib/l10n/app_localizations_de.dart

@@ -467,4 +467,89 @@ class AppLocalizationsDe extends AppLocalizations {
     );
     return '$_temp0';
   }
+
+  @override
+  String get remindersTitle => 'Erinnerungen';
+
+  @override
+  String get remindersNone => 'Keine Erinnerungen';
+
+  @override
+  String get reminderAtTime => 'Zur Uhrzeit';
+
+  @override
+  String reminderMinutesBefore(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count Minuten vorher',
+      one: '1 Minute vorher',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String reminderHoursBefore(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count Stunden vorher',
+      one: '1 Stunde vorher',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String reminderDaysBefore(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count Tage vorher',
+      one: '1 Tag vorher',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String reminderDue(String time) {
+    return 'Fällig um $time';
+  }
+
+  @override
+  String get remindersChannel => 'Erinnerungen an Aufgaben';
+
+  @override
+  String get remindersNotAllowed =>
+      'Benachrichtigungen sind für Halkyon Todo aus: Erinnerungen erscheinen, sobald du sie in den Systemeinstellungen erlaubst.';
+
+  @override
+  String get remindersOnThisDevice =>
+      'Erinnerungen kommen auf jedem deiner Geräte, das deine Aufgaben öffnet.';
+
+  @override
+  String get weekPrevious => 'Vorige Woche';
+
+  @override
+  String get weekNext => 'Folgende Woche';
+
+  @override
+  String get searchTitle => 'Suchen';
+
+  @override
+  String get searchHint => 'Aufgaben und Projekte suchen';
+
+  @override
+  String get searchEmpty =>
+      'Finde eine Aufgabe über die Wörter in ihrem Titel, ihrer Beschreibung oder ihren Labels. Die Suche läuft auf diesem Gerät: deine Instanz kann deine Aufgaben nicht lesen.';
+
+  @override
+  String searchNone(String query) {
+    return 'Nichts gefunden für „$query“.';
+  }
+
+  @override
+  String get searchProjects => 'Projekte';
+
+  @override
+  String get searchTasks => 'Aufgaben';
 }

apps/todo/halkyon_todo_flutter/lib/l10n/app_localizations_en.dart

@@ -467,6 +467,91 @@ class AppLocalizationsEn extends AppLocalizations {
     );
     return '$_temp0';
   }
+
+  @override
+  String get remindersTitle => 'Reminders';
+
+  @override
+  String get remindersNone => 'No reminders';
+
+  @override
+  String get reminderAtTime => 'At its time';
+
+  @override
+  String reminderMinutesBefore(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count minutes before',
+      one: '1 minute before',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String reminderHoursBefore(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count hours before',
+      one: '1 hour before',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String reminderDaysBefore(int count) {
+    String _temp0 = intl.Intl.pluralLogic(
+      count,
+      locale: localeName,
+      other: '$count days before',
+      one: '1 day before',
+    );
+    return '$_temp0';
+  }
+
+  @override
+  String reminderDue(String time) {
+    return 'Due at $time';
+  }
+
+  @override
+  String get remindersChannel => 'Task reminders';
+
+  @override
+  String get remindersNotAllowed =>
+      'Notifications are off for Halkyon Todo: reminders show once you allow them in the system\'s settings.';
+
+  @override
+  String get remindersOnThisDevice =>
+      'Reminders come on each of your devices that opens your tasks.';
+
+  @override
+  String get weekPrevious => 'Previous week';
+
+  @override
+  String get weekNext => 'Following week';
+
+  @override
+  String get searchTitle => 'Search';
+
+  @override
+  String get searchHint => 'Search tasks and projects';
+
+  @override
+  String get searchEmpty =>
+      'Find a task by the words in its title, its description or its labels. Search runs on this device: your instance can\'t read your tasks.';
+
+  @override
+  String searchNone(String query) {
+    return 'Nothing found for “$query”.';
+  }
+
+  @override
+  String get searchProjects => 'Projects';
+
+  @override
+  String get searchTasks => 'Tasks';
 }
 
 /// The translations for English, as used in the United Kingdom (`en_GB`).