fix(mcp): keep hidden apps' flags when a batch paste overwrites a server

The drawer's apps state covers every MCP app with hidden ones set to
false, and buildEntry spread it over the existing server's apps, so
overwriting from a batch paste turned the server off in apps hidden from
the sidebar and removed it from their config. Only let the visible
checkboxes override the stored flags.

src/components/mcp/McpFormModal.tsx

@@ -322,16 +322,21 @@ const McpFormModal: React.FC<McpFormModalProps> = ({
     base?: McpServer,
     metaDraft?: MetaDraft,
   ): McpServer => {
+    // 只用「写入到」里能看到的勾选覆盖原值：隐藏只影响界面，覆盖已有服务器时隐藏
+    // 应用的开关原样带回，否则会被当成关掉、从那些应用的配置里删掉；不支持 MCP 的
+    // 应用（OpenClaw 等）沿用原值，新建时为 false
+    const visibleApps = Object.fromEntries(
+      visibleAppIds.map((app) => [app, apps[app]]),
+    );
     const entry: McpServer = {
       ...(base ? { ...base } : {}),
       id,
       name: id,
       server: spec,
-      // 不支持 MCP 的应用（OpenClaw 等）沿用原值，新建时为 false
       apps: {
         openclaw: false,
-        ...(base?.apps ?? {}),
-        ...apps,
+        ...(base?.apps ?? appsOf(undefined, [])),
+        ...visibleApps,
       } as McpServer["apps"],
     };
     if (!metaDraft) {

tests/components/McpFormModal.test.tsx

@@ -185,6 +185,46 @@ describe("McpFormModal (drawer)", () => {
     expect(mocks.upsert.mock.calls[0][0]).toMatchObject({ id: "linear" });
   });
 
+  it("keeps hidden apps' flags when overwriting an existing server from a batch", async () => {
+    // Hermes 从侧栏隐藏了：覆盖 figma 时它在 Hermes 的开关要原样带回，不能被当成关掉
+    renderForm({
+      visibleAppIds: ["claude", "codex"],
+      existingServers: {
+        figma: {
+          id: "figma",
+          name: "figma",
+          server: { type: "http", url: "http://127.0.0.1:3845/mcp" },
+          apps: { claude: false, hermes: true } as McpServer["apps"],
+        },
+      },
+    });
+    fireEvent.change(screen.getByLabelText("mcpPage.drawer.paste"), {
+      target: {
+        value: JSON.stringify({
+          mcpServers: {
+            linear: { type: "http", url: "https://mcp.linear.app/mcp" },
+            figma: { type: "http", url: "http://127.0.0.1:3845/v2" },
+          },
+        }),
+      },
+    });
+    await userEvent.click(
+      screen.getByRole("button", { name: "mcpPage.drawer.batchOverwrite" }),
+    );
+    await userEvent.click(
+      screen.getByRole("button", { name: "mcpPage.drawer.addManyReplace" }),
+    );
+    await waitFor(() => expect(mocks.upsert).toHaveBeenCalledTimes(2));
+    const figma = mocks.upsert.mock.calls
+      .map((call) => call[0])
+      .find((entry) => entry.id === "figma");
+    expect(figma.apps).toMatchObject({
+      claude: true,
+      codex: true,
+      hermes: true,
+    });
+  });
+
   it("masks secrets in the JSON tab and keeps them on save", async () => {
     const server: McpServer = {
       id: "serena",