feat(learn): choosing how much an assistant thinks, and the assistants by provider in the field

Halkyon Learn's ADR 0021, D60 and D63:

- A chip after the scope's offers the efforts the operator allows for the
  assistant asked, its own marked; the one picked is kept per assistant on
  the device (DeviceSettings.askEfforts) and asked at, also by a
  conversation continued from the history. One the operator no longer
  allows counts as none.
- Every question asks for its effort's ceiling on output, as the thinking
  counts towards it (8,192 to 65,536 tokens; 16,384 at the model's own),
  where it asked for 4,096; the flashcards proposed, Explain and Why? ask
  at the assistant's own effort, a person's own key at none and 4,096.
- The field's picker lists the assistants under their providers' names,
  each in its colour.

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/learn/halkyon_learn_flutter/lib/l10n/app_de.arb

@@ -1829,6 +1829,8 @@
   "assistantHintAsk": "{name} fragen…",
   "assistantSendAsk": "Fragen",
   "assistantScope": "Was er nachschlagen darf",
+  "assistantEffortTooltip": "Denkaufwand: wie viel er nachdenkt, bevor er antwortet",
+  "assistantEffortDefault": "{effort} (Standard)",
   "assistantScopeTicked": "Nur was ich auswähle",
   "assistantScopeStudyset": "Dieses Lernset",
   "assistantScopeTree": "Ganzer Baum",

apps/learn/halkyon_learn_flutter/lib/l10n/app_en.arb

@@ -2149,6 +2149,10 @@
   "assistantSendAsk": "Ask",
   "assistantScope": "What it may look up",
   "@assistantScope": {"description": "Tooltip of the scope chip: how far an assistant may look beyond the parts chosen."},
+  "assistantEffortTooltip": "Effort: how much it thinks before it answers",
+  "@assistantEffortTooltip": {"description": "Tooltip of the effort chip in the field (ADR 0021, D63): more effort thinks longer and uses more of the budget."},
+  "assistantEffortDefault": "{effort} (default)",
+  "@assistantEffortDefault": {"description": "The effort the operator set up for an assistant, among those to choose, by its name.", "placeholders": {"effort": {"type": "String"}}},
   "assistantScopeTicked": "Only what I choose",
   "assistantScopeStudyset": "This studyset",
   "assistantScopeTree": "Its tree",

apps/learn/halkyon_learn_flutter/lib/l10n/app_localizations.dart

@@ -10791,6 +10791,18 @@ abstract class AppLocalizations {
   /// **'What it may look up'**
   String get assistantScope;
 
+  /// Tooltip of the effort chip in the field (ADR 0021, D63): more effort thinks longer and uses more of the budget.
+  ///
+  /// In en, this message translates to:
+  /// **'Effort: how much it thinks before it answers'**
+  String get assistantEffortTooltip;
+
+  /// The effort the operator set up for an assistant, among those to choose, by its name.
+  ///
+  /// In en, this message translates to:
+  /// **'{effort} (default)'**
+  String assistantEffortDefault(String effort);
+
   /// No description provided for @assistantScopeTicked.
   ///
   /// In en, this message translates to:

apps/learn/halkyon_learn_flutter/lib/l10n/app_localizations_de.dart

@@ -6758,6 +6758,15 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get assistantScope => 'Was er nachschlagen darf';
 
+  @override
+  String get assistantEffortTooltip =>
+      'Denkaufwand: wie viel er nachdenkt, bevor er antwortet';
+
+  @override
+  String assistantEffortDefault(String effort) {
+    return '$effort (Standard)';
+  }
+
   @override
   String get assistantScopeTicked => 'Nur was ich auswähle';
 

apps/learn/halkyon_learn_flutter/lib/l10n/app_localizations_en.dart

@@ -6694,6 +6694,15 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get assistantScope => 'What it may look up';
 
+  @override
+  String get assistantEffortTooltip =>
+      'Effort: how much it thinks before it answers';
+
+  @override
+  String assistantEffortDefault(String effort) {
+    return '$effort (default)';
+  }
+
   @override
   String get assistantScopeTicked => 'Only what I choose';