fix(proxy): disambiguate activate without profile

tests/e2e/proxy-command.e2e.test.ts

@@ -107,4 +107,50 @@ describe('proxy command e2e', () => {
     const stopped = runCli(['proxy', 'stop']);
     expect(stopped.status).toBe(0);
   }, 35000);
+
+  it('requires an explicit profile when activating with multiple running proxies', async () => {
+    const firstPort = await getPort();
+    const ccsDir = path.join(tempDir, '.ccs');
+    fs.mkdirSync(ccsDir, { recursive: true });
+    const firstSettingsPath = path.join(ccsDir, 'ccg.settings.json');
+    const secondSettingsPath = path.join(ccsDir, 'ccgm.settings.json');
+    fs.writeFileSync(
+      path.join(ccsDir, 'config.json'),
+      JSON.stringify({ profiles: { ccg: firstSettingsPath, ccgm: secondSettingsPath } }, null, 2),
+      'utf8'
+    );
+    fs.writeFileSync(
+      firstSettingsPath,
+      JSON.stringify({
+        env: {
+          ANTHROPIC_BASE_URL: 'http://127.0.0.1:11434',
+          ANTHROPIC_AUTH_TOKEN: 'ollama-ccg',
+          ANTHROPIC_MODEL: 'qwen3-coder',
+          CCS_DROID_PROVIDER: 'generic-chat-completion-api',
+        },
+      }),
+      'utf8'
+    );
+    fs.writeFileSync(
+      secondSettingsPath,
+      JSON.stringify({
+        env: {
+          ANTHROPIC_BASE_URL: 'https://api.openai.com/v1',
+          ANTHROPIC_AUTH_TOKEN: 'sk-ccgm',
+          ANTHROPIC_MODEL: 'gpt-4.1',
+        },
+      }),
+      'utf8'
+    );
+
+    expect(runCli(['proxy', 'start', 'ccg', '--port', String(firstPort)]).status).toBe(0);
+    const secondPort = await getPort();
+    expect(runCli(['proxy', 'start', 'ccgm', '--port', String(secondPort)]).status).toBe(0);
+
+    const activate = runCli(['proxy', 'activate', '--shell', 'bash']);
+    expect(activate.status).toBe(1);
+    expect(activate.stderr).toContain(
+      'Multiple proxies are running. Specify a profile: ccs proxy activate <profile>'
+    );
+  }, 35000);
 });