feat: Execute zone - Playwright PC Web + Appium mobile + AI screenshot diff + test conclusion reports

- Add 3 new agents: web-executor, mobile-executor, result-reporter
- web-executor: Playwright multi-browser (Chromium/Firefox/WebKit) automated scripts
- mobile-executor: Appium dual-platform (Android/iOS) automated scripts
- result-reporter: pixel-level AI visual comparison + test conclusion report with screenshots
- Auto-generate executable Python test scripts from Markdown test cases
- Screenshot strategies: on-failure (default) + on-step (optional)
- Visual diff grading: <1% pass / 1-5% minor / 5-15% UI_DIFF / >15% blocker
- Failure multi-classification: REAL_BUG/UI_DIFF/ENV_ISSUE/DATA_ISSUE/CASE_BUG/SCRIPT_ERROR
- requirements.txt: add playwright + Pillow
- Fleet now: 17 agents across 6 battle zones

scripts/fleet_agents.py

@@ -75,6 +75,25 @@ AGENT_REGISTRY: dict[str, dict[str, Any]] = {
         "name": "数据构造师",
         "description": "精确测试数据集构造",
     },
+    # ── Execute ──
+    "web-executor": {
+        "zone": "execute",
+        "path": "execute/web_executor.md",
+        "name": "Web 自动化执行师",
+        "description": "PC Web 端 Playwright 自动化测试执行 + 截图采集",
+    },
+    "mobile-executor": {
+        "zone": "execute",
+        "path": "execute/mobile_executor.md",
+        "name": "移动端自动化执行师",
+        "description": "Android/iOS APP Appium 自动化测试执行 + 截图采集",
+    },
+    "result-reporter": {
+        "zone": "execute",
+        "path": "execute/result_reporter.md",
+        "name": "测试结果报告师",
+        "description": "截图对比 + AI 视觉验证 + 测试结论报告",
+    },
     # ── Review ──
     "case-reviewer": {
         "zone": "review",
@@ -136,7 +155,7 @@ def list_zone_agents(zone: str) -> list[str]:
 def list_all_agents() -> dict[str, list[str]]:
     """按战区分组列出所有 Agent。"""
     result: dict[str, list[str]] = {}
-    for zone in ["prepare", "analyze", "design", "review", "monitor"]:
+    for zone in ["prepare", "analyze", "design", "execute", "review", "monitor"]:
         result[zone] = list_zone_agents(zone)
     return result