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>

tests/dashboard/test_bugs_route.py

@@ -0,0 +1,47 @@
+"""Tests for bug reports dashboard route."""
+
+import pytest
+from fastapi.testclient import TestClient
+
+
+@pytest.fixture(autouse=True)
+def _isolate_db(tmp_path, monkeypatch):
+    """Point task_queue and event_log SQLite to a temp directory."""
+    db = tmp_path / "swarm.db"
+    monkeypatch.setattr("swarm.task_queue.models.DB_PATH", db)
+    monkeypatch.setattr("swarm.event_log.DB_PATH", db)
+
+
+@pytest.fixture
+def client():
+    from dashboard.app import app
+
+    with TestClient(app) as c:
+        yield c
+
+
+def test_bugs_page_loads(client):
+    resp = client.get("/bugs")
+    assert resp.status_code == 200
+    assert "BUG REPORTS" in resp.text
+
+
+def test_api_list_bugs(client):
+    resp = client.get("/api/bugs")
+    assert resp.status_code == 200
+    data = resp.json()
+    assert "bugs" in data
+    assert "count" in data
+
+
+def test_api_bug_stats(client):
+    resp = client.get("/api/bugs/stats")
+    assert resp.status_code == 200
+    data = resp.json()
+    assert "stats" in data
+    assert "total" in data
+
+
+def test_bugs_page_with_status_filter(client):
+    resp = client.get("/bugs?status=approved")
+    assert resp.status_code == 200