Fix Codex model catalog being wiped by live-config backfill

`modelCatalog` is a cc-switch-private field whose SSOT is the database; Live's
config.toml only carries a lossy `model_catalog_json` projection. Proxy
takeover/restore cycles and the official Codex.app rewriting config.toml can
drop that projection, so `read_live_settings` reconstructs an empty catalog.
Two paths then overwrote the stored mapping with that empty Live snapshot:

- Switch-away backfill (`switch_normal` -> `restore_live_settings_for_provider_backfill`):
  now overlays the DB provider's `modelCatalog`, falling back to the
  Live-reconstructed one only when the DB has none.
- Edit dialog (`EditProviderDialog`): when editing the active Codex provider it
  preferred Live over the DB SSOT; now keeps the DB `modelCatalog` so opening +
  saving no longer clears the mapping table.

Add Rust backfill tests (preserve DB catalog when Live lacks it; keep Live
catalog when DB has none) and a frontend regression test for the edit dialog.

tests/components/EditProviderDialog.test.tsx

@@ -0,0 +1,156 @@
+import { fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import type { Provider } from "@/types";
+
+const apiMocks = vi.hoisted(() => ({
+  getCurrent: vi.fn(),
+  getLiveProviderSettings: vi.fn(),
+  getOpenClawLiveProvider: vi.fn(),
+}));
+
+vi.mock("@/lib/api", () => ({
+  providersApi: {
+    getCurrent: apiMocks.getCurrent,
+  },
+  vscodeApi: {
+    getLiveProviderSettings: apiMocks.getLiveProviderSettings,
+  },
+  openclawApi: {
+    getLiveProvider: apiMocks.getOpenClawLiveProvider,
+  },
+}));
+
+vi.mock("@/components/common/FullScreenPanel", () => ({
+  FullScreenPanel: ({
+    isOpen,
+    children,
+    footer,
+  }: {
+    isOpen: boolean;
+    children: React.ReactNode;
+    footer?: React.ReactNode;
+  }) =>
+    isOpen ? (
+      <div>
+        <div>{children}</div>
+        <div>{footer}</div>
+      </div>
+    ) : null,
+}));
+
+vi.mock("@/components/providers/forms/ProviderForm", () => ({
+  ProviderForm: ({
+    initialData,
+    onSubmit,
+  }: {
+    initialData: {
+      name?: string;
+      websiteUrl?: string;
+      notes?: string;
+      settingsConfig?: Record<string, unknown>;
+      meta?: Record<string, unknown>;
+      icon?: string;
+      iconColor?: string;
+    };
+    onSubmit: (values: {
+      name: string;
+      websiteUrl: string;
+      notes?: string;
+      settingsConfig: string;
+      meta?: Record<string, unknown>;
+      icon?: string;
+      iconColor?: string;
+    }) => void;
+  }) => (
+    <form
+      id="provider-form"
+      onSubmit={(event) => {
+        event.preventDefault();
+        onSubmit({
+          name: initialData.name ?? "",
+          websiteUrl: initialData.websiteUrl ?? "",
+          notes: initialData.notes,
+          settingsConfig: JSON.stringify(initialData.settingsConfig ?? {}),
+          meta: initialData.meta,
+          icon: initialData.icon,
+          iconColor: initialData.iconColor,
+        });
+      }}
+    >
+      <output data-testid="settings-config">
+        {JSON.stringify(initialData.settingsConfig ?? {})}
+      </output>
+    </form>
+  ),
+}));
+
+import { EditProviderDialog } from "@/components/providers/EditProviderDialog";
+
+describe("EditProviderDialog", () => {
+  beforeEach(() => {
+    apiMocks.getCurrent.mockReset();
+    apiMocks.getLiveProviderSettings.mockReset();
+    apiMocks.getOpenClawLiveProvider.mockReset();
+  });
+
+  it("保留 Codex 数据库中的 modelCatalog，避免 live 配置缺字段时清空模型映射", async () => {
+    const dbModelCatalog = {
+      models: [
+        {
+          model: "deepseek-v4-flash",
+          displayName: "DeepSeek V4 Flash",
+          contextWindow: 1000000,
+        },
+      ],
+    };
+    const provider: Provider = {
+      id: "deepseek",
+      name: "DeepSeek",
+      category: "aggregator",
+      settingsConfig: {
+        auth: {
+          OPENAI_API_KEY: "db-key",
+        },
+        config: 'model_provider = "custom"\nmodel = "deepseek-v4-flash"\n',
+        modelCatalog: dbModelCatalog,
+      },
+    };
+    const liveSettings = {
+      auth: {
+        OPENAI_API_KEY: "live-key",
+      },
+      config: 'model_provider = "custom"\nmodel = "deepseek-v4-pro"\n',
+    };
+    const handleSubmit = vi.fn().mockResolvedValue(undefined);
+
+    apiMocks.getCurrent.mockResolvedValue(provider.id);
+    apiMocks.getLiveProviderSettings.mockResolvedValue(liveSettings);
+
+    render(
+      <EditProviderDialog
+        open
+        provider={provider}
+        onOpenChange={vi.fn()}
+        onSubmit={handleSubmit}
+        appId="codex"
+      />,
+    );
+
+    await waitFor(() => {
+      expect(
+        JSON.parse(screen.getByTestId("settings-config").textContent ?? "{}"),
+      ).toEqual({
+        ...liveSettings,
+        modelCatalog: dbModelCatalog,
+      });
+    });
+
+    fireEvent.click(screen.getByRole("button", { name: "common.save" }));
+
+    await waitFor(() => expect(handleSubmit).toHaveBeenCalledTimes(1));
+    expect(handleSubmit.mock.calls[0][0].provider.settingsConfig).toEqual({
+      ...liveSettings,
+      modelCatalog: dbModelCatalog,
+    });
+  });
+});