v1.0.4 - Quick Access reorder, performance improvements, search fixes

- Quick Access drag-to-reorder: drag notes to rearrange, order persists
- Quick Access preserves order when moving notes between notebooks
- In-note search: debounced input, proper scroll-to-match
- Panel resize: RAF-batched updates, editor containment during resize
- Thinner resize handles (3px)
- Note list: removed transition, added CSS containment for 1200+ notes
- Escape closes Settings and Info panels
- Fix Quick Access cache invalidation on remove

src/app.css

@@ -31,7 +31,7 @@
     --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
     --sidebar-width: 220px;
     --notelist-width: 280px;
-    --panel-resize-handle: 4px;
+    --panel-resize-handle: 3px;
 }
 
 :root.dark {
@@ -149,3 +149,12 @@ body {
 .resize-handle.active {
     background: var(--accent);
 }
+
+body.resizing .ProseMirror {
+    pointer-events: none;
+    contain: strict;
+}
+
+body.resizing {
+    user-select: none;
+}