fix(export): exclude lucide tags cache from backup payload

tests/importExport.integration.test.js

@@ -79,6 +79,54 @@ describe("import/export flows", () => {
     window.Blob = OriginalBlob;
   });
 
+  it("export strips lucideTagsCacheV1 from localSettings", async () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date(2026, 3, 4, 8, 9, 10));
+    await setupImportExport({
+      sync: { rememberSpeed: true },
+      local: {
+        customButtonIcons: { faster: { slug: "rocket", svg: "<svg/>" } },
+        lucideTagsCacheV1: { "a-arrow-down": ["letter"] },
+        lucideTagsCacheV1At: 42
+      }
+    });
+    const OriginalBlob = window.Blob;
+    class TestBlob {
+      constructor(parts) {
+        this.parts = parts;
+      }
+      async text() {
+        return this.parts.join("");
+      }
+    }
+    globalThis.Blob = TestBlob;
+    window.Blob = TestBlob;
+    let capturedBlob = null;
+    Object.defineProperty(window.URL, "createObjectURL", {
+      configurable: true,
+      value: vi.fn((blob) => {
+        capturedBlob = blob;
+        return "blob:test";
+      })
+    });
+    Object.defineProperty(window.URL, "revokeObjectURL", {
+      configurable: true,
+      value: vi.fn(() => {})
+    });
+    vi.spyOn(window.HTMLAnchorElement.prototype, "click").mockImplementation(
+      () => {}
+    );
+
+    document.getElementById("exportSettings").click();
+    await flushAsyncWork();
+
+    expect(JSON.parse(await capturedBlob.text()).localSettings).toEqual({
+      customButtonIcons: { faster: { slug: "rocket", svg: "<svg/>" } }
+    });
+    globalThis.Blob = OriginalBlob;
+    window.Blob = OriginalBlob;
+  });
+
   it("imports wrapped backup payloads and refreshes options", async () => {
     vi.useFakeTimers();
     const chrome = await setupImportExport();

tests/importExport.spec.js

@@ -87,6 +87,36 @@ describe("importExport.js", () => {
     expect(document.querySelector("#status").textContent).toContain("exported");
   });
 
+  it("omits Lucide tags cache from exported localSettings", async () => {
+    vi.spyOn(window.HTMLAnchorElement.prototype, "click").mockImplementation(
+      () => {}
+    );
+    const { createObjectURL } = bootImportExport({
+      syncData: { rememberSpeed: true },
+      localData: {
+        customButtonIcons: {
+          faster: { slug: "rocket", svg: "<svg></svg>" }
+        },
+        lucideTagsCacheV1: { "a-arrow-down": ["letter", "text"] },
+        lucideTagsCacheV1At: 999
+      }
+    });
+
+    document.querySelector("#exportSettings").click();
+    await flushAsyncWork();
+
+    const blob = createObjectURL.mock.calls[0][0];
+    const backup = JSON.parse(await blob.text());
+
+    expect(backup.localSettings).toEqual({
+      customButtonIcons: {
+        faster: { slug: "rocket", svg: "<svg></svg>" }
+      }
+    });
+    expect(backup.localSettings.lucideTagsCacheV1).toBeUndefined();
+    expect(backup.localSettings.lucideTagsCacheV1At).toBeUndefined();
+  });
+
   it("imports wrapped backups, restores local data, and refreshes the options page", async () => {
     const { chrome } = bootImportExport();
     window.restore_options = vi.fn();

tests/shared.test.js

@@ -149,5 +149,15 @@ describe("shared helpers", () => {
     expect(importExportUtils.isRecognizedRawSettingsObject({ wat: true })).toBe(
       false
     );
+
+    expect(
+      importExportUtils.filterLocalSettingsForExport({
+        customButtonIcons: { faster: { slug: "zap" } },
+        lucideTagsCacheV1: { "a-arrow-down": ["letter"] },
+        lucideTagsCacheV1At: 123
+      })
+    ).toEqual({
+      customButtonIcons: { faster: { slug: "zap" } }
+    });
   });
 });