Multi-select, paste-to-app, resizable window, polished UI

- Max history default increased to 10K, options: 1K/5K/10K/50K
- Tray icon uses with_id to prevent duplicates on hot-reload
- Selecting an entry now pastes directly into the previous app
  via osascript Cmd+V simulation after hiding the window
- Multi-select: Ctrl+Click toggles, Shift+Arrow extends range,
  Cmd+A selects all, Enter pastes all selected
- Window is resizable, size persists in SQLite across opens
- Window position setting: cursor, center, or any screen corner
- UI cleanup: tighter spacing, cleaner dividers, compact search,
  type badges (TXT/IMG/FILE), PIN label, tabular timestamps
- Context menu shows multi-item labels ("Paste 3 items")
- All tests updated and passing (27 Rust + 33 TypeScript)

Co-authored-by: Cursor <cursoragent@cursor.com>

src-tauri/tauri.conf.json

@@ -17,7 +17,9 @@
         "title": "maCopy",
         "width": 420,
         "height": 560,
-        "resizable": false,
+        "resizable": true,
+        "minWidth": 320,
+        "minHeight": 300,
         "decorations": false,
         "visible": false,
         "alwaysOnTop": true,
@@ -39,6 +41,14 @@
             "core:window:allow-set-focus",
             "core:window:allow-close",
             "core:window:allow-is-visible",
+            "core:window:allow-set-size",
+            "core:window:allow-set-position",
+            "core:window:allow-inner-size",
+            "core:window:allow-outer-size",
+            "core:window:allow-center",
+            "core:window:allow-current-monitor",
+            "core:window:allow-cursor-position",
+            "core:window:allow-start-dragging",
             "core:event:default",
             "core:event:allow-emit",
             "core:event:allow-listen",