fix: Only register MCP tools when connected via torch

- Tools only register when connected to MCP (has torch)
- Store current page for tool activation when torch is obtained
- Add onTorchConnected to activate page tools after MCP connection
- Add onTorchDisconnected to clear tools when losing torch
- Page changes only update tools if connected, otherwise store for later

frontend/src/services/torch.ts

@@ -1,5 +1,6 @@
 import { useTorchStore } from '../stores/torch'
 import { autoConnect, disconnectWebMCP } from './webmcp'
+import { onTorchConnected, onTorchDisconnected } from './toolRegistry'
 import { endpoints } from '../config/endpoints'
 
 let torchWs: WebSocket | null = null
@@ -150,7 +151,8 @@ async function connectToMCP(): Promise<void> {
   console.log('[Torch] Connecting to MCP...')
   const success = await autoConnect()
   if (success) {
-    console.log('[Torch] Connected to MCP')
+    console.log('[Torch] Connected to MCP, activating tools')
+    await onTorchConnected()
   } else {
     console.error('[Torch] Failed to connect to MCP')
   }
@@ -161,6 +163,7 @@ async function connectToMCP(): Promise<void> {
  */
 function disconnectFromMCP(): void {
   console.log('[Torch] Disconnecting from MCP...')
+  onTorchDisconnected()
   disconnectWebMCP()
 }