feat: implement OpenClaw process owner and runtime path utilities

- Add OpenClawProcessOwner class to manage the lifecycle of the OpenClaw process.
- Introduce utility functions for managing OpenClaw runtime paths.
- Update session store to normalize agent session keys and migrate existing keys.
- Refactor main process to handle local provider API routing through a new dispatch function.
- Enhance token usage writer to utilize a new session key parsing function.
- Create agents management store to handle agent data and interactions.
- Update chat store to integrate agent selection and session management.
- Introduce AgentsSection component for displaying agent information in the UI.
- Refactor HomePage to support agent selection and display current agent.
- Update routing to reflect new agents page structure.

electron/api/routes/gateway.ts

@@ -0,0 +1,49 @@
+import type { HostApiContext } from '../context';
+import type { NormalizedHostApiRequest } from '../route-utils';
+import { fail, ok } from '../route-utils';
+
+export async function handleGatewayRoutes(
+  request: NormalizedHostApiRequest,
+  ctx: HostApiContext,
+) {
+  const { pathname, method } = request;
+
+  if (pathname === '/api/app/gateway-info' && method === 'GET') {
+    const status = ctx.gatewayManager.getStatus();
+    return ok({
+      transport: 'ipc-bridge',
+      rpcChannel: 'gateway:rpc',
+      eventChannel: 'gateway:event',
+      ...status,
+    });
+  }
+
+  if (pathname === '/api/gateway/status' && method === 'GET') {
+    return ok(ctx.gatewayManager.getStatus());
+  }
+
+  if (pathname === '/api/gateway/health' && method === 'GET') {
+    return ok(await ctx.gatewayManager.checkHealth());
+  }
+
+  if (pathname === '/api/gateway/start' && method === 'POST') {
+    await ctx.gatewayManager.start();
+    return ok({ success: true });
+  }
+
+  if (pathname === '/api/gateway/stop' && method === 'POST') {
+    await ctx.gatewayManager.stop();
+    return ok({ success: true });
+  }
+
+  if (pathname === '/api/gateway/restart' && method === 'POST') {
+    try {
+      await ctx.gatewayManager.restart();
+      return ok({ success: true });
+    } catch (error) {
+      return fail(500, error instanceof Error ? error.message : String(error));
+    }
+  }
+
+  return null;
+}