Add snippet-library search, sort, empty states, storage monitor (M6, §02/§09D)

src/main.tsx

@@ -3,6 +3,7 @@ import { App } from './app/App';
 import { initPanes, wirePanes } from './app/orchestration/panes';
 import { initPreviewFitMode, wirePreviewFitMode } from './app/orchestration/preferences';
 import { initSettings, wireSettings } from './app/orchestration/settings';
+import { initSnippetSort, wireSnippetSort } from './app/orchestration/snippet-sort';
 import { initApp } from './app/orchestration/startup';
 import { initTheme, wireTheme } from './app/orchestration/theme';
 import '../styles/base.css';
@@ -20,6 +21,11 @@ wirePreviewFitMode();
 initPanes();
 wirePanes();
 
+// Hydrate + persist the library sort (spec §02 → Sort) so the list opens ordered
+// the way the user left it. Hydrate before render; persist on change.
+initSnippetSort();
+wireSnippetSort();
+
 // Hydrate + persist the full UserSettings record (editor / performance /
 // formatting) before render, so the editor, preview, and library read the user's
 // settings from the first paint (spec §07 → Startup load).