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/infrastructure/events/broadcaster.py

@@ -109,6 +109,8 @@ EVENT_ICONS = {
     "system.error": "⚠️",
     "system.warning": "🔶",
     "system.info": "ℹ️",
+    "error.captured": "🐛",
+    "bug_report.created": "📋",
 }
 
 EVENT_LABELS = {
@@ -129,6 +131,8 @@ EVENT_LABELS = {
     "system.error": "Error",
     "system.warning": "Warning",
     "system.info": "Info",
+    "error.captured": "Error captured",
+    "bug_report.created": "Bug report filed",
 }