fix(extensions): dedupe MCP detail API key lookups

src/renderer/components/extensions/mcp/McpServerDetailDialog.tsx

@@ -128,38 +128,6 @@ export const McpServerDetailDialog = ({
     );
   }, [server?.id, open]); // eslint-disable-line react-hooks/exhaustive-deps
 
-  // Auto-fill env vars from saved API keys
-  useEffect(() => {
-    if (!server || server.envVars.length === 0 || !api.apiKeys) return;
-
-    const envVarNames = server.envVars.map((env) => env.name);
-    void api.apiKeys.lookup(envVarNames).then(
-      (results) => {
-        if (results.length === 0) return;
-        const filled = new Set<string>();
-        const updates: Record<string, string> = {};
-        for (const r of results) {
-          updates[r.envVarName] = r.value;
-          filled.add(r.envVarName);
-        }
-        setEnvValues((prev) => {
-          const next = { ...prev };
-          for (const [k, v] of Object.entries(updates)) {
-            // Only auto-fill if the field is empty
-            if (!next[k]) {
-              next[k] = v;
-            }
-          }
-          return next;
-        });
-        setAutoFilledFields(filled);
-      },
-      () => {
-        // Silently ignore lookup failures
-      }
-    );
-  }, [server?.id]); // eslint-disable-line react-hooks/exhaustive-deps
-
   if (!server) return <></>;
 
   const canAutoInstall = !!server.installSpec;

test/renderer/components/extensions/mcp/McpServerDetailDialog.test.ts

@@ -219,4 +219,42 @@ describe('McpServerDetailDialog installed entry handling', () => {
       await Promise.resolve();
     });
   });
+
+  it('looks up saved API keys only once per dialog open', async () => {
+    const host = document.createElement('div');
+    document.body.appendChild(host);
+    const root = createRoot(host);
+    const server = makeServer();
+    server.envVars = [{ name: 'CONTEXT7_API_KEY', isSecret: true }];
+    lookupMock.mockResolvedValue([
+      {
+        envVarName: 'CONTEXT7_API_KEY',
+        value: 'secret',
+      },
+    ]);
+
+    await act(async () => {
+      root.render(
+        React.createElement(McpServerDetailDialog, {
+          server,
+          isInstalled: false,
+          installedEntry: null,
+          diagnostic: null,
+          diagnosticsLoading: false,
+          open: true,
+          onClose: vi.fn(),
+        })
+      );
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+
+    expect(lookupMock).toHaveBeenCalledTimes(1);
+    expect(lookupMock).toHaveBeenCalledWith(['CONTEXT7_API_KEY']);
+
+    await act(async () => {
+      root.unmount();
+      await Promise.resolve();
+    });
+  });
 });