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/lib/settingsImport.test.ts

@@ -0,0 +1,39 @@
+import { describe, it, expect } from "vitest";
+import { validateSettingsExport } from "./settingsImport";
+import type { Settings } from "./types";
+
+const good: Settings = {
+  confirm_before_delete: true, default_folder_id: null, theme: "dark", font_size: "medium",
+  default_ports: { postgresql: 5432 }, tag_order: null, table_refresh_rate: 5, table_page_size: 50,
+  shortcuts: { open_command_palette: "Cmd+K" }, accent_color: "#2563EB",
+  editor_font_size: 14, editor_font_family: "Menlo", editor_word_wrap: "off", editor_minimap: true, editor_tab_size: 2,
+};
+
+describe("validateSettingsExport", () => {
+  it("accepts a well-formed object", () => {
+    const r = validateSettingsExport({ schemaVersion: 1, settings: good });
+    expect(r.ok).toBe(true);
+  });
+
+  it("rejects an invalid theme", () => {
+    const r = validateSettingsExport({ schemaVersion: 1, settings: { ...good, theme: "purple" as never } });
+    expect(r.ok).toBe(false);
+    if (!r.ok) expect(r.errors.some((e) => e.field === "theme")).toBe(true);
+  });
+
+  it("clamps editor_font_size to [8,24]", () => {
+    const r = validateSettingsExport({ schemaVersion: 1, settings: { ...good, editor_font_size: 999 } });
+    expect(r.ok).toBe(true);
+    if (r.ok) expect(r.settings.editor_font_size).toBe(24);
+  });
+
+  it("tolerates unknown keys (version skew)", () => {
+    const r = validateSettingsExport({ schemaVersion: 99, settings: { ...good, futureField: true } } as never);
+    expect(r.ok).toBe(true);
+  });
+
+  it("requires a non-negative table_refresh_rate", () => {
+    const r = validateSettingsExport({ schemaVersion: 1, settings: { ...good, table_refresh_rate: -1 } });
+    expect(r.ok).toBe(false);
+  });
+});