Deck actions UI, consistent icon buttons, native select fix, sidebar stats

- DeckView: rename/duplicate/delete deck via row-hover icon actions, with
  a ConfirmDialog for delete and PromptDialog (with friendly name-
  collision errors) for rename/duplicate.
- Add a shared IconButton (plus overlay/danger variants) and replace
  every ad hoc close/remove button in the app with it: deck actions,
  remove-card-from-deck (list and tile), clear-commander, the card-
  preview close, and the ingest-progress dismiss.
- Fix native <select> (Group by, Format, In deck): only color/border were
  overridden, leaving native OS chrome (height, arrow, popup) in place.
  Drop appearance and draw a custom chevron so they match text inputs.
- Click-to-preview: show both faces of a double-faced card side by side
  on wide viewports instead of requiring Flip, and size the preview
  images larger overall.
- Sidebar footer: replace the plain "N cards" line with a "Your library"
  panel (unique/copies/decks tiles + a WUBRG color-distribution bar),
  polling get_library_stats while card data is loaded.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/api.ts

@@ -55,6 +55,14 @@ export interface Status {
   card_count: number;
 }
 
+export interface LibraryStats {
+  unique_cards: number;
+  total_copies: number;
+  deck_count: number;
+  color_counts: [number, number, number, number, number]; // W, U, B, R, G
+  colorless_count: number;
+}
+
 export interface IngestStageInfo {
   id: string;
   label: string;
@@ -104,11 +112,15 @@ export const api = {
 
   searchLibrary: (filter: LibraryFilter) =>
     invoke<LibraryCard[]>("search_library", { filter }),
+  getLibraryStats: () => invoke<LibraryStats>("get_library_stats"),
 
   listDecks: () => invoke<Deck[]>("list_decks"),
   createDeck: (name: string, commanderOracleId: string | null) =>
     invoke<Deck>("create_deck", { name, commanderOracleId }),
   deleteDeck: (deckId: number) => invoke<void>("delete_deck", { deckId }),
+  renameDeck: (deckId: number, name: string) => invoke<void>("rename_deck", { deckId, name }),
+  duplicateDeck: (deckId: number, newName: string) =>
+    invoke<Deck>("duplicate_deck", { deckId, newName }),
   setDeckFormat: (deckId: number, format: string) =>
     invoke<void>("set_deck_format", { deckId, format }),
   setDeckCommander: (deckId: number, oracleId: string | null) =>