Add web frontend with JWT auth, RBAC, SSE dashboard, and config editor

- FastAPI + htmx + Jinja2 web frontend, started with --web flag
- JWT HS256 auth (WEB_SECRET_KEY) with httpOnly cookies; access (15 min) +
  refresh (7 day) tokens; refresh rotation + JTI revocation in data/web.db
- RBAC: superadmin > admin > reader enforced per route
- Live SSE dashboard fed by tui/events broadcast queue
- Config editor: keyword groups and channel list saved to data/runtime_config.json
  and hot-reloaded in-process (scorer.reload_from_config, signal_channel_changed)
- config.py migrated to load groups/channels from runtime_config.json;
  falls back to hardcoded defaults when file absent
- tui/events.py: subscribe/unsubscribe broadcast, set_bot_context/signal_channel_changed
- utils/scorer.py: import config as _config (fixes local binding); reload_from_config()
- utils/database.py: count_by_severity, recent_for_domains, count_by_severity_for_domains
- 53 new tests (events bus, JWT lifecycle, web DB CRUD, RBAC enforcement,
  config round-trip); total 141 passing

utils/scorer.md

@@ -72,16 +72,20 @@ The URL field handles two common stealer-log complications:
 
 ---
 
-## Module-level globals (rebuilt on import + via KeywordsScreen)
+## Module-level globals (rebuilt on import + via reload_from_config)
 
 | Name | Type | Description |
 |------|------|-------------|
 | `EMPLOYEE_DOMAINS` | `list[tuple[str, Pattern]]` | `(domain_str, anchored_pattern)` for `@`-keywords |
 | `ORG_DOMAINS` | `list[Pattern]` | Plain domain patterns for all keywords |
 
+scorer uses `import config as _config` (not `from config import TARGET_KEYWORDS`), so patching `config.TARGET_KEYWORDS` at runtime is sufficient — `_build_*` reads the live module attribute.
+
 To rebuild after editing `config.TARGET_KEYWORDS` at runtime:
 ```python
 import utils.scorer as scorer
-scorer.EMPLOYEE_DOMAINS = scorer._build_employee_domains()
-scorer.ORG_DOMAINS      = scorer._build_org_domains()
+scorer.reload_from_config()
 ```
+
+### `reload_from_config() -> None`
+Rebuilds `EMPLOYEE_DOMAINS` and `ORG_DOMAINS` from the current `config.TARGET_KEYWORDS`. Called by web config routes after `config.save_runtime_config()` writes new keyword groups.