feat: add emulated tool-calling bridge for Lingma

Add a proxy-side tool emulation layer so Lingma requests can surface stable OpenAI tool_calls and Anthropic tool_use blocks even when upstream tool events are missing or inconsistent.

Constraint: Keep native Lingma tool event bridging as the first path and layer emulation as a fallback

Rejected: Depend exclusively on Lingma native tool/invoke events | tool visibility remains inconsistent across models and transports

Confidence: high

Scope-risk: moderate

tests/test_pool_stats_config.py

@@ -3,10 +3,12 @@ from __future__ import annotations
 import json
 import os
 import sys
+import tempfile
 import types
 import unittest
 from types import SimpleNamespace
 from unittest.mock import patch
+import zipfile
 
 # app.lingma_pool imports auto_login; tests here don't execute Playwright paths.
 # Stub module import so test environments without playwright can import pool code.
@@ -28,6 +30,7 @@ sys.modules.setdefault("playwright", _playwright)
 sys.modules.setdefault("playwright.async_api", _playwright_async)
 
 from app.config import _parse_accounts, load_settings
+from app.bootstrap_lingma import bootstrap_from_vsix
 from app.lingma_pool import LingmaPool
 from app.stats import StatsCollector, estimate_tokens
 
@@ -212,5 +215,57 @@ class ConfigParsingTests(unittest.TestCase):
         self.assertEqual(settings.tool_allowlist, [])
 
 
+class BootstrapLingmaTests(unittest.TestCase):
+    def _make_test_vsix(self, root: str) -> str:
+        nested_zip_path = os.path.join(root, "nested.zip")
+        with zipfile.ZipFile(nested_zip_path, "w") as nested:
+            nested.writestr("2.5.20/x86_64_linux/Lingma", b"new-binary")
+            nested.writestr("2.5.20/extension/main.js", b"console.log('ok')")
+
+        vsix_path = os.path.join(root, "test.vsix")
+        with zipfile.ZipFile(vsix_path, "w") as vsix:
+            with open(nested_zip_path, "rb") as nested_file:
+                vsix.writestr(
+                    "extension/dist/bin/lingma-2.5.20.zip",
+                    nested_file.read(),
+                )
+        return vsix_path
+
+    def test_bootstrap_refreshes_when_extension_assets_missing(self) -> None:
+        with tempfile.TemporaryDirectory() as tmpdir:
+            bin_dir = os.path.join(tmpdir, "data", "bin")
+            release_dir = os.path.join(bin_dir, "2.5.20")
+            os.makedirs(release_dir, exist_ok=True)
+
+            lingma_bin = os.path.join(bin_dir, "Lingma")
+            with open(lingma_bin, "wb") as f:
+                f.write(b"old-binary")
+
+            marker = {
+                "version": "2.5.20",
+                "release_root": "2.5.20",
+            }
+            with open(os.path.join(bin_dir, ".lingma-bootstrap.json"), "w", encoding="utf-8") as f:
+                json.dump(marker, f)
+
+            vsix_path = self._make_test_vsix(tmpdir)
+
+            env = {
+                "LINGMA_BIN": lingma_bin,
+                "LINGMA_SOURCE_TYPE": "vsix",
+                "LINGMA_VSIX_URL": f"file://{vsix_path}",
+                "LINGMA_BOOTSTRAP_ALWAYS": "false",
+                "LINGMA_FORCE_REFRESH": "false",
+            }
+            with patch.dict(os.environ, env, clear=False):
+                bootstrap_from_vsix()
+
+            with open(lingma_bin, "rb") as f:
+                self.assertEqual(f.read(), b"new-binary")
+            self.assertTrue(
+                os.path.exists(os.path.join(release_dir, "extension", "main.js"))
+            )
+
+
 if __name__ == "__main__":
     unittest.main()