feat(02-04): add swipe-to-delete gesture for mobile

- Install svelte-gestures package for touch gesture support
- Add useSwipe hook to EntryCard for left-swipe detection
- Implement delete confirmation overlay on swipe
- Add red delete background revealed during swipe
- Maintain desktop delete button in expanded view

package.json

@@ -35,6 +35,7 @@
 		"better-sqlite3": "^12.6.2",
 		"drizzle-orm": "^0.45.1",
 		"nanoid": "^5.1.6",
+		"svelte-gestures": "^5.2.2",
 		"svelte-persisted-store": "^0.12.0",
 		"tailwindcss": "^4.1.18",
 		"zod": "^4.3.6"