feat: clear a meal-plan day or the whole week in one action

New bulk-delete route for the owner's own weekStart-scoped plan
(mirrors recipes/bulk's DELETE), plus ?ids= support added to the
existing shared-plan DELETE route (kept ?entryId= working
unchanged). UI: hover-reveal trash icon per day header, "Clear week"
button in the toolbar, one shared confirm dialog for both.

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "epicure",
-  "version": "0.16.0",
+  "version": "0.17.0",
   "private": true,
   "scripts": {
     "dev": "pnpm --filter web dev",