feat: add official Codex skill and harden task execution

Install and update artemis-use with task diagnostics and plugin guidance. Preserve cross-device file receipts, review canonical reports, guard stage transitions and reduce small history summaries. Improve exploration lifecycle, request recovery and browser live connections.

apps/showcase_ui/src/app/components/model-settings/capability-settings.component.ts

@@ -1,7 +1,8 @@
 import { Component, inject, OnInit, signal, output } from '@angular/core';
 import { FormsModule } from '@angular/forms';
 import { HttpClient } from '@angular/common/http';
-import { finalize } from 'rxjs';
+import { finalize, timeout } from 'rxjs';
+import { UI_READ_TIMEOUT_MS } from '../../core/http-timeouts';
 
 interface Capabilities {
   recording?: { codec: string; max_long_edge: number; fps: number; h265_kbps: number; h264_kbps: number; computer_scope: string; minimum_disk_mb: number; hevc_playback: boolean };
@@ -98,7 +99,7 @@ export class CapabilitySettingsComponent implements OnInit {
   config: Capabilities = { adb_auto_connect: true, adb_discovery_interval_seconds: 10, adb_discovery_timeout_seconds: 5, video_enabled: false, recording_enabled: false, outputter_enabled: true, step_summarizer_enabled: true, screenshot_limit_enabled: true, screenshot_max_long_edge: 2048, task_timeout_seconds: 1800, observation_timeout_seconds: 60, observation_max_attempts: 3, device_command_timeout_seconds: 10, action_failure_attempts: 3, worker_cleanup_timeout_seconds: 30 };
   busy = signal(false); loading = signal(true); loaded = signal(false); message = signal(''); error = signal('');
   ngOnInit(): void {
-    this.http.get<Capabilities>('/api/system/capability-settings').pipe(finalize(() => this.loading.set(false))).subscribe({
+    this.http.get<Capabilities>('/api/system/capability-settings').pipe(timeout(UI_READ_TIMEOUT_MS), finalize(() => this.loading.set(false))).subscribe({
       next: config => { this.config = config; this.loaded.set(true); this.changed.emit(config); }, error: () => this.error.set('功能配置加载失败，请刷新页面重试。')
     });
   }