fix: emit recovery-specific error, remove redundant mock, use React Router for state clear

- socket.js: emit error:recover:error instead of generic error:server
- memory.test.js: remove redundant cos.js mock (memory.js imports from cosEvents.js)
- RunnerPage.jsx: use navigate() with replace instead of window.history.replaceState
  to preserve React Router internal state

Author: atomantic

client/src/pages/RunnerPage.jsx

@@ -1,5 +1,5 @@
 import { useState, useEffect, useRef } from 'react';
-import { useLocation } from 'react-router-dom';
+import { useLocation, useNavigate } from 'react-router-dom';
 import { Clock, Image, X, Info } from 'lucide-react';
 import toast from '../components/ui/Toast';
 import * as api from '../services/api';
@@ -9,6 +9,7 @@ import BrailleSpinner from '../components/BrailleSpinner';
 
 export function RunnerPage() {
   const location = useLocation();
+  const navigate = useNavigate();
   const [mode, setMode] = useState('ai'); // 'ai' or 'command'
   const [prompt, setPrompt] = useState('');
   const [command, setCommand] = useState('');
@@ -52,7 +53,7 @@ export function RunnerPage() {
         }
       }
       // Clear location state to prevent re-triggering on refresh
-      window.history.replaceState({}, document.title);
+      navigate(location.pathname, { replace: true, state: null });
     }
   }, [location.state, apps]);
 

server/services/memory.test.js

@@ -22,9 +22,6 @@ vi.mock('../lib/uuid.js', () => ({
 vi.mock('./cosEvents.js', () => ({
   cosEvents: new EventEmitter()
 }));
-vi.mock('./cos.js', () => ({
-  cosEvents: new EventEmitter()
-}));
 
 // Mock vectorMath
 vi.mock('../lib/vectorMath.js', () => ({

server/services/socket.js

@@ -313,7 +313,7 @@ export function initSocket(io) {
       } catch (err) {
         const message = err?.message ?? String(err);
         console.error(`❌ Socket handler error [error:recover]: ${message}`);
-        socket.emit('error:server', { message });
+        socket.emit('error:recover:error', { message });
       }
     });