fix: clean up logging colors, reduce noise, enable Tailscale access (#166)

* fix: reserve red for real errors, reduce log noise, allow Tailscale access

- Add _ColorFormatter: red = ERROR/CRITICAL only, yellow = WARNING, green = INFO
- Override uvicorn's default colors to use our scheme
- Downgrade discord "not installed" from ERROR to WARNING (optional dep)
- Downgrade DuckDuckGo unavailable from INFO to DEBUG
- Stop discord token watcher retry loop when discord.py not installed
- Add configurable trusted_hosts setting; dev mode allows all hosts
- Exclude .claude/ from uvicorn reload watcher (worktree isolation)
- Fix pre-commit hook: use tox -e unit, bump timeout to 60s

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* style: auto-format with black

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: pre-commit hook auto-formats with black+isort before testing

Formatting should never block a commit — just fix it automatically.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Trip T <trip@local>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

tox.ini

@@ -166,7 +166,8 @@ commands =
 [testenv:dev]
 description = Start dashboard with auto-reload (local development)
 commands =
-    uvicorn dashboard.app:app --reload --host 0.0.0.0 --port 8000
+    uvicorn dashboard.app:app --reload --host 0.0.0.0 --port 8000 \
+        --reload-exclude ".claude"
 
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