Phase 4 + M5: Low-priority fixes and frontend component integration

M5: TagBadge integrated into ContactDetail (replaces plain Badge)
M5: EntityHistoryPanel integrated into ContactDetail (timeline section)

L1: Replace document.write() with Blob URL in print.ts (XSS-safe)
L2: AI UI Control feedback storage capped at 100 entries (FIFO eviction)
L3: Backup & Restore documentation added to DEPLOY.md

Verified: Backend import OK, TypeScript 0 errors

app/plugins/builtins/ai_ui_control/websocket_manager.py

@@ -92,10 +92,20 @@ class AIUIControlWSManager:
         return None
 
     def store_feedback(self, feedback: dict[str, Any]) -> None:
-        """Store feedback from frontend after command execution."""
+        """Store feedback from frontend after command execution.
+
+        Maintains a maximum of 100 feedback entries to prevent memory exhaustion.
+        Oldest entries are removed when the limit is reached.
+        """
         command_id = feedback.get("command_id")
         if command_id:
             self._feedback[command_id] = feedback
+            # Enforce max feedback entries (FIFO eviction)
+            MAX_FEEDBACK_ENTRIES = 100
+            if len(self._feedback) > MAX_FEEDBACK_ENTRIES:
+                keys_to_remove = list(self._feedback.keys())[:-MAX_FEEDBACK_ENTRIES]
+                for key in keys_to_remove:
+                    del self._feedback[key]
             logger.debug(f"AI UI Control: feedback stored for command {command_id}: {feedback.get('status')}")
 
     def get_feedback(self, command_id: str) -> dict[str, Any] | None: