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/DbViewerScreen.tsx

@@ -5,7 +5,7 @@ import { TooltipProvider } from "../ui/Tooltip";
 import { DbViewerSidebar, NAV_CAPABILITY_KEY } from "./DbViewerSidebar";
 import { DbViewerToolbar } from "./DbViewerToolbar";
 import { isDestructiveQuery, isSchemaModifyingQuery } from "../../lib/utils";
-import { executeQuery } from "../../lib/commands";
+import { executeQuery, cancelQuery } from "../../lib/commands";
 import { getCapabilities } from "../../lib/dbCapabilities";
 
 const QueryEditor = lazy(() => import("../editor/QueryEditor").then((m) => ({ default: m.QueryEditor })));
@@ -27,6 +27,7 @@ import { useDbConnection } from "../../hooks/useDbConnection";
 import { useDbViewerStore } from "../../stores/dbViewerStore";
 import { useConnectionStore } from "../../stores/connectionStore";
 import { useSettingsStore } from "../../stores/settingsStore";
+import { useNotificationStore } from "../../stores/notificationStore";
 import { useShortcut } from "../../hooks/useShortcut";
 import { ConnectionDropBanner } from "./ConnectionDropBanner";
 import { ToolsPage } from "./ToolsPage";
@@ -184,6 +185,7 @@ export function DbViewerScreen({
     const viewCapabilityKey = NAV_CAPABILITY_KEY[currentView] ?? "explorer";
     const viewSupported = capabilities[viewCapabilityKey];
     const settings = useSettingsStore((s) => s.settings);
+    const notify = useNotificationStore((s) => s.notify);
     const setDefaultPageSize = useDbViewerStore((s) => s.setDefaultPageSize);
     const clearColumnFilter = useDbViewerStore((s) => s.clearColumnFilter);
     const setFilterRules = useDbViewerStore((s) => s.setFilterRules);
@@ -230,6 +232,8 @@ export function DbViewerScreen({
     const tables = useDbViewerStore((s) => s.tables);
     const stageCellEdit = useDbViewerStore((s) => s.stageCellEdit);
 
+    const isRunning = activeTab?.tabType === "query" && !!activeTab?.loading;
+
     const isMatview =
         activeTab && activeTab.tabType === "table"
             ? tables.some(
@@ -1028,6 +1032,18 @@ const onQueriesPanelResizeStart = useCallback(
                                                 onRestore={handleRestoreSql}
                                                 onRunFromHistory={handleRunFromHistory}
                                                 dbType={currentConnection?.db_type}
+                                                isRunning={isRunning}
+                                                onCancel={async () => {
+                                                    try {
+                                                        await cancelQuery(connectionId);
+                                                        notify("Query cancelled", "info");
+                                                    } catch (e) {
+                                                        notify(
+                                                            e instanceof Error ? e.message : String(e),
+                                                            "error",
+                                                        );
+                                                    }
+                                                }}
                                             />
                                             <div className="flex-1 min-h-0 overflow-hidden">
                                                 <QueryEditor