feat: icon+tooltip buttons on meal-plan/shopping-list headers (v0.28.0)

Match the recipe detail page's action-row convention: Share, Generate
shopping list, Shopping lists link, Print, Export to calendar, and
Send to grocery delivery collapse to icon-only with a tooltip instead
of icon+text, freeing up header space. Week prev/next arrows moved
next to the week date instead of sitting at the end of the button row.

Note: verified via typecheck/lint only — this dev environment has no
authenticated session to visually confirm in-browser.

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

apps/web/lib/changelog.ts

@@ -1,5 +1,5 @@
 // Mirrors CHANGELOG.md at the repo root — update both together.
-export const APP_VERSION = "0.27.2";
+export const APP_VERSION = "0.28.0";
 
 export type ChangelogEntry = {
   version: string;
@@ -11,6 +11,14 @@ export type ChangelogEntry = {
 };
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    version: "0.28.0",
+    date: "2026-07-14 14:05",
+    added: [
+      "**Meal plan and shopping list header buttons now match the recipe page's icon+tooltip style** — Share, Generate shopping list, Shopping lists, Print, Export to calendar, Send to grocery delivery all collapsed to icon-only with a tooltip, instead of crowding the header with text labels.",
+      "**Week-switch arrows on the meal plan now sit right next to the week date**, instead of at the far end of the button row.",
+    ],
+  },
   {
     version: "0.27.2",
     date: "2026-07-14 13:20",