feat: Query history + saved queries (#5)

* fix: restore frontend test baseline (vitest jsdom env + tsc + mock fixes)

* feat: v6 migration — favorite column + queries table (Task 1)

* feat: extend TS types for favorites + saved queries (Task 2)

* feat: dedup consecutive + prune to 500 in insert_query_history (Task 3)

* feat: favorite column threading + set_history_favorite command (Task 4)

* feat: saved queries store CRUD (Task 5)

* feat: saved query commands + registration (Task 6)

* feat: queryStore — Zustand cache for history + saved queries (Task 7)

* feat: QueryHistoryDropdown — toolbar history dropdown (Task 8)

* feat: SaveQueryDialog — save query modal (Task 9)

* feat: QueryToolbar — add History + Save icons (Task 10)

* feat: QueriesPanel — History + Saved tabs (Task 11)

* feat: wire Queries view + toolbar to panel (Task 12)

* fix: global scope wrappers, empty/spinner states, cache invalidation (Task 13)

* feat: Queries view — history sidebar + tabbed query workspace (PR feedback)

* fix: toolbar action order + view-specific empty state (PR feedback)

* fix: view-specific empty state icon (PR feedback)

* fix: portal Tooltip to body so it is never clipped by overflow containers (PR feedback)

* feat: Queries sidebar — Explorer-style header + per-connection scoping (PR feedback)

* fix: move History/Saved dropdown to right side of Queries header (PR feedback)

* fix: History/Saved dropdown on its own row in Queries header (PR feedback)

* fix: Queries header order (search above dropdown) + sidebar width matches Explorer (PR feedback)

* fix: Queries header spacing — tight rows, pb-3 on container (PR feedback)

* fix: Queries header spacing — space-y-2 on container, no mb on title row (PR feedback)

* feat: history/saved rows click-to-load, remove sub-buttons (PR feedback)

* feat: merge Functions/Triggers/Sequences/Enums/Extensions into single Objects view (PR feedback)

* fix: Schema Visualizer nav icon — node graph glyph (PR feedback)

* fix: Objects view — type dropdown replaces static header label (PR feedback)

* fix: Objects empty state — remove bg circle, larger icon (PR feedback)

* fix: center icon in Objects empty state (PR feedback)

* feat: merge Backup/Restore/DB Sync into single Tools view (PR feedback)

* docs: update AGENTS.md + README for query history/saved queries, merged Objects + Tools views

src/components/db-viewer/DbViewerSidebar.tsx

@@ -1,16 +1,11 @@
 import {
-    ArrowLeftRight,
+    Boxes,
+    Clock,
     Database,
-    Download,
-    FunctionSquare,
-    GitBranch,
-    Grid2x2,
+    DatabaseBackup,
     Home,
-    ListOrdered,
-    Puzzle,
     Settings,
-    Tag,
-    Upload,
+    Share2,
 } from "lucide-react";
 import { Tooltip } from "../ui/Tooltip";
 
@@ -32,31 +27,18 @@ export function DbViewerSidebar({
 }: DbViewerSidebarProps) {
     const topItems: NavItem[] = [
         { id: "db-viewer", label: "Explorer", icon: <Database size={16} /> },
+        {
+            id: "queries",
+            label: "Queries",
+            icon: <Clock size={16} />,
+        },
         {
             id: "schema-visualizer",
             label: "Schema Visualizer",
-            icon: <Grid2x2 size={16} />,
-        },
-        {
-            id: "functions",
-            label: "Functions",
-            icon: <FunctionSquare size={16} />,
-        },
-        { id: "triggers", label: "Triggers", icon: <GitBranch size={16} /> },
-        {
-            id: "sequences",
-            label: "Sequences",
-            icon: <ListOrdered size={16} />,
-        },
-        { id: "enums", label: "Enums", icon: <Tag size={16} /> },
-        { id: "extensions", label: "Extensions", icon: <Puzzle size={16} /> },
-        { id: "backup", label: "Backup", icon: <Download size={16} /> },
-        { id: "restore", label: "Restore", icon: <Upload size={16} /> },
-        {
-            id: "sync",
-            label: "DB Sync",
-            icon: <ArrowLeftRight size={16} />,
+            icon: <Share2 size={16} />,
         },
+        { id: "objects", label: "Objects", icon: <Boxes size={16} /> },
+        { id: "tools", label: "Tools", icon: <DatabaseBackup size={16} /> },
     ];
 
     const bottomItems: NavItem[] = [