feat: Add torch MCP tools for multi-browser control

- Add torchHandlers.ts with 5 tools:
  - list_torch_clients: list connected browsers with metadata
  - get_torch_status: show current torch holder
  - transfer_torch: transfer control to another browser
  - request_torch: request MCP control
  - release_torch: release MCP control
- Add 'transfer' message type to server torch-handler
- Add torch category to all pages
- Export helper functions from torch.ts

frontend/src/services/torch.ts

@@ -144,6 +144,40 @@ export async function releaseTorch(): Promise<boolean> {
   return true
 }
 
+/**
+ * Transfer the torch to a specific client
+ */
+export async function transferTorch(targetId: string): Promise<boolean> {
+  if (!torchWs || torchWs.readyState !== WebSocket.OPEN) {
+    console.error('[Torch] Not connected to server')
+    return false
+  }
+
+  torchWs.send(JSON.stringify({ type: 'transfer', targetId }))
+  return true
+}
+
+/**
+ * Get list of connected clients
+ */
+export function getTorchClients() {
+  const torchStore = useTorchStore()
+  return torchStore.clients
+}
+
+/**
+ * Get current torch status
+ */
+export function getTorchStatus() {
+  const torchStore = useTorchStore()
+  return {
+    clientId: torchStore.clientId,
+    hasTorch: torchStore.hasTorch,
+    torchHolderId: torchStore.torchHolderId,
+    clientCount: torchStore.clients.length
+  }
+}
+
 /**
  * Connect to MCP (when we have the torch)
  */