feat(todo): pick a place on a map, for quick add and a task's Where (ADR 0033, D32)

The location picker searches by city or district and name through
PlaceSearchGateway, its results a list and pins on Train's OpenFreeMap map,
or takes a pin placed by hand; recent places, and None, Arrive or Leave.
TodoDependencies.places is the seam for the instance's search; until then
komoot's public Photon, in a debug build asked for it alone. Quick add has
`+` suggestions, an entry in its + menu and a pin button; the task sheet a
Where box; a task's row the place's name.

ReminderScheduler plans the places to watch into LocationReminderGateway,
a no-op off Android, which TodoPerson.dispose clears, and Settings' Reminders
says while the device may not watch them.

Whats-New: Tasks can have locations: type + or use the + menu, search by city and name or pick on the map, and be reminded on arriving or leaving (Android).
Whats-New-De: Aufgaben können Orte haben: Tippe + oder nutze das +-Menü, suche nach Stadt und Name oder wähle auf der Karte, und lass dich beim Ankommen oder Verlassen erinnern (Android).
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

@@ -273,5 +273,30 @@
   "planGroupShow": "{group} einblenden",
   "planAllProjects": "Alle Projekte",
   "planProjectsCount": "{count, plural, =1{1 Projekt} other{{count} Projekte}}",
-  "planFilterTitle": "Nach Projekt filtern"
+  "planFilterTitle": "Nach Projekt filtern",
+  "locationTitle": "Ort",
+  "locationAdd": "Ort hinzufügen",
+  "locationWhere": "Wo",
+  "locationAnyOf": "Einer davon",
+  "locationSearchHint": "Stadt oder Stadtteil, dann der Name",
+  "locationSearchAny": "Ort suchen",
+  "locationSearchFor": "„{query}“ suchen",
+  "locationSearchUnavailable": "Die Suche ist hier nicht verfügbar. Verschiebe die Karte und tippe, um einen Pin zu setzen.",
+  "locationSearchFailed": "Die Suche hat nicht geklappt. Versuch es noch einmal.",
+  "locationNoResults": "Nichts gefunden",
+  "locationRecent": "Zuletzt verwendet",
+  "locationPin": "Gesetzter Ort",
+  "locationName": "Name",
+  "locationMine": "Mein Standort",
+  "locationRemindNone": "Keine Erinnerung",
+  "locationRemindArrive": "Beim Ankommen",
+  "locationRemindLeave": "Beim Verlassen",
+  "locationRemove": "Entfernen",
+  "locationAccessTitle": "Standort immer erlauben",
+  "locationAccessHint": "Damit Halkyon Todo dich beim Ankommen oder Verlassen erinnert, braucht es deinen Standort auch, wenn es geschlossen ist. Er bleibt auf diesem Gerät. Wähle als Nächstes „Immer zulassen“.",
+  "locationAccessGo": "Weiter",
+  "locationOffTitle": "Standort ist für Erinnerungen aus",
+  "locationOffHint": "Erinnerungen an einem Ort brauchen „Immer zulassen“.",
+  "locationArrived": "Du bist bei {name}",
+  "locationLeft": "Du hast {name} verlassen"
 }

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

@@ -910,5 +910,120 @@
   "planFilterTitle": "Filter by project",
   "@planFilterTitle": {
     "description": "Today's Plan's project filter (ADR 0033, D30): its search field's hint and its name."
+  },
+  "locationTitle": "Location",
+  "@locationTitle": {
+    "description": "Quick add's + menu and its button (ADR 0033, D32)."
+  },
+  "locationAdd": "Add location",
+  "@locationAdd": {
+    "description": "A task's Where, and the picker's button."
+  },
+  "locationWhere": "Where",
+  "@locationWhere": {
+    "description": "The heading of a task's places."
+  },
+  "locationAnyOf": "Any of these",
+  "@locationAnyOf": {
+    "description": "Under a task's Where, with several places: they are alternatives."
+  },
+  "locationSearchHint": "City or district, then the name",
+  "@locationSearchHint": {
+    "description": "The location picker's search field."
+  },
+  "locationSearchAny": "Search for a place",
+  "@locationSearchAny": {
+    "description": "Quick add, as + is typed."
+  },
+  "locationSearchFor": "Search for “{query}”",
+  "@locationSearchFor": {
+    "description": "Quick add, as +something is typed.",
+    "placeholders": {
+      "query": {
+        "type": "String"
+      }
+    }
+  },
+  "locationSearchUnavailable": "Search isn't available here. Move the map and tap to place a pin.",
+  "@locationSearchUnavailable": {
+    "description": "The location picker without a place search."
+  },
+  "locationSearchFailed": "The search didn't work. Try again.",
+  "@locationSearchFailed": {
+    "description": "The location picker after a failed search."
+  },
+  "locationNoResults": "Nothing found",
+  "@locationNoResults": {
+    "description": "The location picker, a search without results."
+  },
+  "locationRecent": "Recent",
+  "@locationRecent": {
+    "description": "The location picker's places of the person's tasks."
+  },
+  "locationPin": "Pinned place",
+  "@locationPin": {
+    "description": "The name of a pin placed by hand where nothing names the spot."
+  },
+  "locationName": "Name",
+  "@locationName": {
+    "description": "The name field of a pin placed by hand."
+  },
+  "locationMine": "My position",
+  "@locationMine": {
+    "description": "The map's button."
+  },
+  "locationRemindNone": "No reminder",
+  "@locationRemindNone": {
+    "description": "A location's reminder."
+  },
+  "locationRemindArrive": "On arriving",
+  "@locationRemindArrive": {
+    "description": "A location's reminder."
+  },
+  "locationRemindLeave": "On leaving",
+  "@locationRemindLeave": {
+    "description": "A location's reminder."
+  },
+  "locationRemove": "Remove",
+  "@locationRemove": {
+    "description": "A task's location's menu."
+  },
+  "locationAccessTitle": "Allow location all the time",
+  "@locationAccessTitle": {
+    "description": "Before asking for the position in the background."
+  },
+  "locationAccessHint": "To remind you when you arrive or leave, Halkyon Todo needs your position while it is closed too. It stays on this device. Next, choose “Allow all the time”.",
+  "@locationAccessHint": {
+    "description": "Before asking for the position in the background."
+  },
+  "locationAccessGo": "Continue",
+  "@locationAccessGo": {
+    "description": "Before asking for the position in the background."
+  },
+  "locationOffTitle": "Location is off for reminders",
+  "@locationOffTitle": {
+    "description": "Settings' Reminders while places are planned and may not be watched."
+  },
+  "locationOffHint": "Reminders at a place need “Allow all the time”.",
+  "@locationOffHint": {
+    "description": "Settings' Reminders while places are planned and may not be watched."
+  },
+  "locationArrived": "You're at {name}",
+  "@locationArrived": {
+    "description": "A reminder on arriving, below the task's title.",
+    "placeholders": {
+      "name": {
+        "type": "String"
+      }
+    }
+  },
+  "locationLeft": "You've left {name}",
+  "@locationLeft": {
+    "description": "A reminder on leaving, below the task's title.",
+    "placeholders": {
+      "name": {
+        "type": "String"
+      }
+    }
   }
 }

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

@@ -1743,6 +1743,156 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Filter by project'**
   String get planFilterTitle;
+
+  /// Quick add's + menu and its button (ADR 0033, D32).
+  ///
+  /// In en, this message translates to:
+  /// **'Location'**
+  String get locationTitle;
+
+  /// A task's Where, and the picker's button.
+  ///
+  /// In en, this message translates to:
+  /// **'Add location'**
+  String get locationAdd;
+
+  /// The heading of a task's places.
+  ///
+  /// In en, this message translates to:
+  /// **'Where'**
+  String get locationWhere;
+
+  /// Under a task's Where, with several places: they are alternatives.
+  ///
+  /// In en, this message translates to:
+  /// **'Any of these'**
+  String get locationAnyOf;
+
+  /// The location picker's search field.
+  ///
+  /// In en, this message translates to:
+  /// **'City or district, then the name'**
+  String get locationSearchHint;
+
+  /// Quick add, as + is typed.
+  ///
+  /// In en, this message translates to:
+  /// **'Search for a place'**
+  String get locationSearchAny;
+
+  /// Quick add, as +something is typed.
+  ///
+  /// In en, this message translates to:
+  /// **'Search for “{query}”'**
+  String locationSearchFor(String query);
+
+  /// The location picker without a place search.
+  ///
+  /// In en, this message translates to:
+  /// **'Search isn\'t available here. Move the map and tap to place a pin.'**
+  String get locationSearchUnavailable;
+
+  /// The location picker after a failed search.
+  ///
+  /// In en, this message translates to:
+  /// **'The search didn\'t work. Try again.'**
+  String get locationSearchFailed;
+
+  /// The location picker, a search without results.
+  ///
+  /// In en, this message translates to:
+  /// **'Nothing found'**
+  String get locationNoResults;
+
+  /// The location picker's places of the person's tasks.
+  ///
+  /// In en, this message translates to:
+  /// **'Recent'**
+  String get locationRecent;
+
+  /// The name of a pin placed by hand where nothing names the spot.
+  ///
+  /// In en, this message translates to:
+  /// **'Pinned place'**
+  String get locationPin;
+
+  /// The name field of a pin placed by hand.
+  ///
+  /// In en, this message translates to:
+  /// **'Name'**
+  String get locationName;
+
+  /// The map's button.
+  ///
+  /// In en, this message translates to:
+  /// **'My position'**
+  String get locationMine;
+
+  /// A location's reminder.
+  ///
+  /// In en, this message translates to:
+  /// **'No reminder'**
+  String get locationRemindNone;
+
+  /// A location's reminder.
+  ///
+  /// In en, this message translates to:
+  /// **'On arriving'**
+  String get locationRemindArrive;
+
+  /// A location's reminder.
+  ///
+  /// In en, this message translates to:
+  /// **'On leaving'**
+  String get locationRemindLeave;
+
+  /// A task's location's menu.
+  ///
+  /// In en, this message translates to:
+  /// **'Remove'**
+  String get locationRemove;
+
+  /// Before asking for the position in the background.
+  ///
+  /// In en, this message translates to:
+  /// **'Allow location all the time'**
+  String get locationAccessTitle;
+
+  /// Before asking for the position in the background.
+  ///
+  /// In en, this message translates to:
+  /// **'To remind you when you arrive or leave, Halkyon Todo needs your position while it is closed too. It stays on this device. Next, choose “Allow all the time”.'**
+  String get locationAccessHint;
+
+  /// Before asking for the position in the background.
+  ///
+  /// In en, this message translates to:
+  /// **'Continue'**
+  String get locationAccessGo;
+
+  /// Settings' Reminders while places are planned and may not be watched.
+  ///
+  /// In en, this message translates to:
+  /// **'Location is off for reminders'**
+  String get locationOffTitle;
+
+  /// Settings' Reminders while places are planned and may not be watched.
+  ///
+  /// In en, this message translates to:
+  /// **'Reminders at a place need “Allow all the time”.'**
+  String get locationOffHint;
+
+  /// A reminder on arriving, below the task's title.
+  ///
+  /// In en, this message translates to:
+  /// **'You\'re at {name}'**
+  String locationArrived(String name);
+
+  /// A reminder on leaving, below the task's title.
+  ///
+  /// In en, this message translates to:
+  /// **'You\'ve left {name}'**
+  String locationLeft(String name);
 }
 
 class _AppLocalizationsDelegate

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

@@ -1082,4 +1082,89 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get planFilterTitle => 'Nach Projekt filtern';
+
+  @override
+  String get locationTitle => 'Ort';
+
+  @override
+  String get locationAdd => 'Ort hinzufügen';
+
+  @override
+  String get locationWhere => 'Wo';
+
+  @override
+  String get locationAnyOf => 'Einer davon';
+
+  @override
+  String get locationSearchHint => 'Stadt oder Stadtteil, dann der Name';
+
+  @override
+  String get locationSearchAny => 'Ort suchen';
+
+  @override
+  String locationSearchFor(String query) {
+    return '„$query“ suchen';
+  }
+
+  @override
+  String get locationSearchUnavailable =>
+      'Die Suche ist hier nicht verfügbar. Verschiebe die Karte und tippe, um einen Pin zu setzen.';
+
+  @override
+  String get locationSearchFailed =>
+      'Die Suche hat nicht geklappt. Versuch es noch einmal.';
+
+  @override
+  String get locationNoResults => 'Nichts gefunden';
+
+  @override
+  String get locationRecent => 'Zuletzt verwendet';
+
+  @override
+  String get locationPin => 'Gesetzter Ort';
+
+  @override
+  String get locationName => 'Name';
+
+  @override
+  String get locationMine => 'Mein Standort';
+
+  @override
+  String get locationRemindNone => 'Keine Erinnerung';
+
+  @override
+  String get locationRemindArrive => 'Beim Ankommen';
+
+  @override
+  String get locationRemindLeave => 'Beim Verlassen';
+
+  @override
+  String get locationRemove => 'Entfernen';
+
+  @override
+  String get locationAccessTitle => 'Standort immer erlauben';
+
+  @override
+  String get locationAccessHint =>
+      'Damit Halkyon Todo dich beim Ankommen oder Verlassen erinnert, braucht es deinen Standort auch, wenn es geschlossen ist. Er bleibt auf diesem Gerät. Wähle als Nächstes „Immer zulassen“.';
+
+  @override
+  String get locationAccessGo => 'Weiter';
+
+  @override
+  String get locationOffTitle => 'Standort ist für Erinnerungen aus';
+
+  @override
+  String get locationOffHint =>
+      'Erinnerungen an einem Ort brauchen „Immer zulassen“.';
+
+  @override
+  String locationArrived(String name) {
+    return 'Du bist bei $name';
+  }
+
+  @override
+  String locationLeft(String name) {
+    return 'Du hast $name verlassen';
+  }
 }

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

@@ -1082,6 +1082,90 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get planFilterTitle => 'Filter by project';
+
+  @override
+  String get locationTitle => 'Location';
+
+  @override
+  String get locationAdd => 'Add location';
+
+  @override
+  String get locationWhere => 'Where';
+
+  @override
+  String get locationAnyOf => 'Any of these';
+
+  @override
+  String get locationSearchHint => 'City or district, then the name';
+
+  @override
+  String get locationSearchAny => 'Search for a place';
+
+  @override
+  String locationSearchFor(String query) {
+    return 'Search for “$query”';
+  }
+
+  @override
+  String get locationSearchUnavailable =>
+      'Search isn\'t available here. Move the map and tap to place a pin.';
+
+  @override
+  String get locationSearchFailed => 'The search didn\'t work. Try again.';
+
+  @override
+  String get locationNoResults => 'Nothing found';
+
+  @override
+  String get locationRecent => 'Recent';
+
+  @override
+  String get locationPin => 'Pinned place';
+
+  @override
+  String get locationName => 'Name';
+
+  @override
+  String get locationMine => 'My position';
+
+  @override
+  String get locationRemindNone => 'No reminder';
+
+  @override
+  String get locationRemindArrive => 'On arriving';
+
+  @override
+  String get locationRemindLeave => 'On leaving';
+
+  @override
+  String get locationRemove => 'Remove';
+
+  @override
+  String get locationAccessTitle => 'Allow location all the time';
+
+  @override
+  String get locationAccessHint =>
+      'To remind you when you arrive or leave, Halkyon Todo needs your position while it is closed too. It stays on this device. Next, choose “Allow all the time”.';
+
+  @override
+  String get locationAccessGo => 'Continue';
+
+  @override
+  String get locationOffTitle => 'Location is off for reminders';
+
+  @override
+  String get locationOffHint =>
+      'Reminders at a place need “Allow all the time”.';
+
+  @override
+  String locationArrived(String name) {
+    return 'You\'re at $name';
+  }
+
+  @override
+  String locationLeft(String name) {
+    return 'You\'ve left $name';
+  }
 }
 
 /// The translations for English, as used in the United Kingdom (`en_GB`).