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>

CHANGELOG.md

@@ -2,6 +2,15 @@
 
 All notable changes to Epicure are documented here. This file is mirrored in-app at `/changelog` (and in the admin dashboard) via `apps/web/lib/changelog.ts` — update both together.
 
+## 0.80.0 — 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).
+
 ## 0.79.0 — 2026-07-24 16:00
 
 ### Fixed