feat: automatic error feedback loop with bug report tracker (#80)

Errors and uncaught exceptions are now automatically captured, deduplicated,
persisted to a rotating log file, and filed as bug report tasks in the
existing task queue — giving Timmy a sovereign, local issue tracker with
zero new dependencies.

- Add RotatingFileHandler writing errors to logs/errors.log (5MB rotate, 5 backups)
- Add error capture module with stack-trace hashing and 5-min dedup window
- Add FastAPI exception middleware + global exception handler
- Instrument all background loops (briefing, thinking, task processor) with capture_error()
- Extend task queue with bug_report task type and auto-approve rule
- Fix auto-approve type matching (was ignoring task_type field entirely)
- Add /bugs dashboard page and /api/bugs JSON endpoints
- Add ERROR_CAPTURED and BUG_REPORT_CREATED event types for real-time feed
- Add BUGS nav link to desktop and mobile navigation
- Add 16 tests covering error capture, deduplication, and bug report routes

Co-authored-by: Alexander Payne <apayne@MM.local>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/config.py

@@ -141,6 +141,14 @@ class Settings(BaseSettings):
     thinking_enabled: bool = True
     thinking_interval_seconds: int = 300  # 5 minutes between thoughts
 
+    # ── Error Logging ─────────────────────────────────────────────────
+    error_log_enabled: bool = True
+    error_log_dir: str = "logs"
+    error_log_max_bytes: int = 5_242_880  # 5 MB
+    error_log_backup_count: int = 5
+    error_feedback_enabled: bool = True  # Auto-create bug report tasks
+    error_dedup_window_seconds: int = 300  # 5-min dedup window
+
     # ── Scripture / Biblical Integration ──────────────────────────────
     # Enable the sovereign biblical text module.  When enabled, Timmy
     # loads the local ESV text corpus and runs meditation workflows.