feat: version history as 10th feature flag, richer upgrade prompts, close unguarded photo-import tab (v0.80.0)

Recipe version history is now gated like the other 9 per-tier features (enabled by default, locked-vs-hidden treatment via isFeatureAvailableAnyTier). UpgradeDialog now shows a tagline + concrete bullet list per feature instead of one generic sentence.

Also closes a real gap: the AI-generate dialog's Photo tab hit /api/v1/ai/import-photo directly with no tier check in the UI (server route was already correctly gated) — a locked-out user could fill it in and hit a dead-end error instead of an upgrade prompt. Now threaded through the same lock/hide props as the dedicated PhotoImportButton.

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 = "0.79.0";
+export const APP_VERSION = "0.80.0";
 
 export type ChangelogEntry = {
   version: string;
@@ -11,6 +11,17 @@ export type ChangelogEntry = {
 };
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    version: "0.80.0",
+    date: "2026-07-24 16:45",
+    added: [
+      "Recipe version history is now a 10th per-tier feature flag (enabled by default, same as variations/pairings), with the same locked-vs-hidden treatment as the others.",
+      "Upgrade prompts for locked features now show real detail — a tagline and 2-3 concrete bullet points per feature — instead of one generic sentence for every feature.",
+    ],
+    fixed: [
+      "The AI-generate dialog's Photo tab was a second, completely unguarded entry point into recipe_import_photo — reachable and fully functional regardless of the feature being disabled for your tier, even though the dedicated Photo Import button was correctly gated. Now hidden/locked in step with every other entry point (server-side enforcement in the API route was already correct; this was a UI-only gap).",
+    ],
+  },
   {
     version: "0.79.0",
     date: "2026-07-24 16:00",