perf：优化识图，缓解重复回复，使用原始插件manifest_id避免不一致情况

pytests/webui/test_plugin_management_routes.py

@@ -61,3 +61,76 @@ def test_resolve_installed_plugin_path_accepts_manifest_id_case_mismatch(client:
 
     assert plugin_path is not None
     assert plugin_path.name == "demo_plugin"
+
+
+def test_install_plugin_preserves_manifest_declared_id(client: TestClient, monkeypatch):
+    class FakeGitMirrorService:
+        async def clone_repository(self, **kwargs):
+            target_path = kwargs["target_path"]
+            target_path.mkdir(parents=True, exist_ok=True)
+            (target_path / "_manifest.json").write_text(
+                json.dumps(
+                    {
+                        "manifest_version": 2,
+                        "id": "author.declared",
+                        "name": "Declared Plugin",
+                        "version": "1.0.0",
+                        "author": {"name": "author"},
+                    }
+                ),
+                encoding="utf-8",
+            )
+            return {"success": True}
+
+    monkeypatch.setattr(management_module, "get_git_mirror_service", lambda: FakeGitMirrorService())
+
+    response = client.post(
+        "/api/webui/plugins/install",
+        json={
+            "plugin_id": "market.plugin",
+            "repository_url": "https://github.com/author/declared",
+            "branch": "main",
+        },
+    )
+
+    assert response.status_code == 200
+    plugin_path = support_module.resolve_installed_plugin_path("author.declared")
+    assert plugin_path is not None
+    manifest = json.loads((plugin_path / "_manifest.json").read_text(encoding="utf-8"))
+    assert manifest["id"] == "author.declared"
+
+
+def test_install_plugin_backfills_missing_manifest_id(client: TestClient, monkeypatch):
+    class FakeGitMirrorService:
+        async def clone_repository(self, **kwargs):
+            target_path = kwargs["target_path"]
+            target_path.mkdir(parents=True, exist_ok=True)
+            (target_path / "_manifest.json").write_text(
+                json.dumps(
+                    {
+                        "manifest_version": 2,
+                        "name": "Legacy Plugin",
+                        "version": "1.0.0",
+                        "author": {"name": "author"},
+                    }
+                ),
+                encoding="utf-8",
+            )
+            return {"success": True}
+
+    monkeypatch.setattr(management_module, "get_git_mirror_service", lambda: FakeGitMirrorService())
+
+    response = client.post(
+        "/api/webui/plugins/install",
+        json={
+            "plugin_id": "market.legacy",
+            "repository_url": "https://github.com/author/legacy",
+            "branch": "main",
+        },
+    )
+
+    assert response.status_code == 200
+    plugin_path = support_module.resolve_installed_plugin_path("market.legacy")
+    assert plugin_path is not None
+    manifest = json.loads((plugin_path / "_manifest.json").read_text(encoding="utf-8"))
+    assert manifest["id"] == "market.legacy"