fix: handle pausing/draining states in UI guards and process cleanup

Follow-up fixes after merging PR #183 (graceful pause/drain mode):

- process_manager: _stream_output finally block now transitions from
  pausing/paused_graceful to crashed/stopped (not just running), and
  cleans up the drain signal file on process exit
- App.tsx: block Reset button and R shortcut during pausing/paused_graceful
- AgentThought/ProgressDashboard: keep thought bubble visible while pausing
- OrchestratorAvatar: add draining/paused cases to animation, glow, and
  description switch statements
- AgentMissionControl: show Draining/Paused badge text for new states
- registry.py: remove redundant type annotation to fix mypy no-redef
- process_manager.py: add type:ignore for SQLAlchemy Column assignment
- websocket.py: reclassify test-pass lines as 'testing' not 'success'
- review-pr.md: add post-review recommended action guidance

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

server/websocket.py

@@ -61,7 +61,7 @@ THOUGHT_PATTERNS = [
     (re.compile(r'(?:Testing|Verifying|Running tests|Validating)\s+(.+)', re.I), 'testing'),
     (re.compile(r'(?:Error|Failed|Cannot|Unable to|Exception)\s+(.+)', re.I), 'struggling'),
     # Test results
-    (re.compile(r'(?:PASS|passed|success)', re.I), 'success'),
+    (re.compile(r'(?:PASS|passed|success)', re.I), 'testing'),
     (re.compile(r'(?:FAIL|failed|error)', re.I), 'struggling'),
 ]