feat(agent): add voice input capability and standardize tool naming

- Add voice recording with transcribe endpoint (ASR) for multimodal input
- Android: add RECORD_AUDIO and INTERNET permissions
- Refactor tool naming: frontend tools use 'front.' prefix, backend tools use 'back.'
- Migrate calendar tools: create_calendar_event -> back.mutate/list/delete events
- Add calendar_event_list.v1 and calendar_operation.v1 UI card types
- Update all Flutter and Python tests to match new tool naming conventions
- Add record package dependency for voice recording

apps/lib/features/chat/data/ai/ai_decision_engine.dart

@@ -82,7 +82,9 @@ class AiDecisionEngine {
   }
 
   ForceTriggerResult? tryForceTrigger(String text) {
-    final match = RegExp(r'#tool:(\w+)\s*(\{.*\})?').firstMatch(text);
+    final match = RegExp(
+      r'#tool:([A-Za-z0-9_.-]+)\s*(\{.*\})?',
+    ).firstMatch(text);
     if (match == null) return null;
 
     final toolName = match.group(1)!;