v0.7.8: MySQL/SQLite backup-sync, Excel export, query cancel, settings import/export, Windows title-bar fix, SQLite table editor (#16)

* [P1-T1] feat(backup): MySQL/SQLite backup models + db_type on SyncOptions (Task 1.1)

* [P1-T2] feat: enable tools(mysql,sqlite) + tableManagement(sqlite) + add fflate (Task 1.2)

* [P1-T3] feat(cancel): CancelHandle enum + CancelRegistry (Task 1.3)

* [P2-T1] feat(export): hand-rolled XLSX writer with inline-string cells (Task 2.1)

* [P2-T2] feat(backup): SQLite .dump/restore/sync core, fail-closed virtual tables (Task 2.2)

* [P2-T3] feat(backup): MySQL dump/restore/sync arg builders + tool resolution (Task 2.3)

* [P2-T4] feat(settings): pure import validator + SettingsExport envelope + Store.apply_settings (Task 2.4)

* [P2-T5] feat(table-editor): SQLite create/diff/rebuild SQL generation, fail-closed AUTOINCREMENT (Task 2.5)

* [P3-T1] feat(commands): MySQL/SQLite backup + settings export/import commands + wrappers (Task 3.1)

* [P3-T2] feat(cancel): capture cancel primitives at connect; cancel_query command; SQLite interrupt test (Task 3.2)

* [P3-T3] feat(table-editor): SQLite object-change dispatch + execute_change Ddl/RebuildTable (Task 3.3)

* [P4-T1] feat(tools): DB-aware backup/restore/sync pages (Task 4.1)

* [P4-T2] feat(export): xlsx export in grid toolbar + overflow menu (Task 4.2)

* [P4-T3] feat(query): cancel button wired to cancelQuery (Task 4.3)

* [P4-T4] feat(settings): export/import buttons + validation gate (Task 4.4)

* [P4-T5] fix(ui): gate macOS overlay drag strip to macOS only (Task 4.5)

* [P4-T6] feat(table-editor): SQLite Create/Edit Table mode (Task 4.6)

* [P5-T1] chore: bump 0.7.7 -> 0.7.8 + README/AGENTS/ROADMAP status (Task 5.1)

* [P5-T2] build(release): bundle mariadb-dump + mariadb client (system-first fallback) (Task 5.2)

* fix(cancel): propagate cancellations past wrapped->raw fallback (SQLite/PG/MySQL) + MySQL CONNECTION_ID cast

* fix(export): Excel export from overflow menu did nothing + add export success/error toasts

* fix(export): tree kebab export fetches table data when rows not loaded

* docs(readme): surface v0.7.8 features (MySQL/SQLite backup-sync, Excel export, query cancel, SQLite table editor, settings import/export)

src/components/db-viewer/TableOverflowMenu.test.tsx

@@ -56,6 +56,7 @@ describe("TableOverflowMenu", () => {
     expect(screen.getByText("Open in new tab")).toBeInTheDocument();
     expect(screen.getByText("Copy table schema")).toBeInTheDocument();
     expect(screen.getByText("Export data (CSV)")).toBeInTheDocument();
+    expect(screen.getByText("Export data (Excel)")).toBeInTheDocument();
   });
 
   it("fires onOpenTab when menu item clicked", async () => {
@@ -118,6 +119,41 @@ describe("TableOverflowMenu", () => {
     await waitFor(() => expect(spy).toHaveBeenCalledWith([[1]], columns, "csv", "public.t"));
   });
 
+  it("Excel export calls exportData and notifies", async () => {
+    const spy = vi.spyOn(exportData, "exportData").mockImplementation(() => {});
+    const { useNotificationStore } = await import("../../stores/notificationStore");
+    useNotificationStore.getState().notifications.length = 0;
+    const columns = [{ name: "id", data_type: "integer", is_nullable: false, is_pk: true, is_fk: false, fk_ref: null, default_value: null, editable: true, is_generated: false }];
+    render(<TableOverflowMenu schema="public" table="t" onOpenTab={() => "tab-1"} columns={columns} rows={[[1]]} />);
+    fireEvent.click(screen.getByLabelText(/table options/i));
+    fireEvent.click(screen.getByText(/export data \(excel\)/i));
+    await waitFor(() => expect(spy).toHaveBeenCalledWith([[1]], columns, "xlsx", "public.t"));
+    const st = useNotificationStore.getState();
+    expect(st.notifications.some((n) => n.message.toLowerCase().includes("exported"))).toBe(true);
+  });
+
+  it("tree kebab export fetches table data when rows are absent", async () => {
+    const spy = vi.spyOn(exportData, "exportData").mockImplementation(() => {});
+    const getSpy = vi.spyOn(commands, "getTableData").mockResolvedValue({
+      columns: [{ name: "id", data_type: "integer", is_nullable: false, is_pk: true, is_fk: false, fk_ref: null, default_value: null, editable: true, is_generated: false }],
+      rows: [[42]],
+      total_rows: 1,
+      page: 1,
+      page_size: 1000,
+    });
+    const { useNotificationStore } = await import("../../stores/notificationStore");
+    useNotificationStore.getState().notifications.length = 0;
+    render(<TableOverflowMenu schema="public" table="t" onOpenTab={() => "tab-1"} connectionId="c1" />);
+    fireEvent.click(screen.getByLabelText(/table options/i));
+    fireEvent.click(screen.getByText(/export data \(excel\)/i));
+    await waitFor(() =>
+      expect(getSpy).toHaveBeenCalledWith("c1", "public", "t", 1, 1000),
+    );
+    await waitFor(() => expect(spy).toHaveBeenCalled());
+    const st = useNotificationStore.getState();
+    expect(st.notifications.some((n) => n.message.includes("Exported"))).toBe(true);
+  });
+
   it("maintenance items are gated by capability and run via confirm", async () => {
     vi.spyOn(commands, "runMaintenance").mockResolvedValue({ duration_ms: 3, message: "VACUUM completed" });
     render(<TableOverflowMenu schema="public" table="users" onOpenTab={() => ""} connectionId="c1" />);