feat: gate premium CV themes

docs/implementation-roadmap.md

@@ -195,7 +195,7 @@ Goal: commercialise. Last, per the guide's "do not over-engineer before needed.
 | 7.4 | **DONE (2026-07-30)** — attachment uploads enforce total per-user storage entitlements (250 MB free, 5 GB Premium/Admin) in addition to the existing 10 MB per-file cap. | **P3** | **S** | 7.2 | Storage limits match the exposed capability model. |
 | 7.5 | **Stripe billing** | **P3** | **L** | 7.2 | Still blocked on **Stripe keys** — the only remaining hard blocker. Tiers are now decided. |
 | 7.6 | ✅ **DONE (2026-07-30)** — public CV (`/cv/{guid}`), privacy-first random links, revoke/rotate sharing | **P3** | **M** | 3.4, 4.2 | Anonymous rendering is isolated behind an explicit public flag, served with `noindex`, and revoked links cannot be restored accidentally. |
-| 7.7 | **Premium themes** | **P3** | **S** | 4.3, 7.2 | Trivial once themes are data. Impossible while they are C# methods. A decided premium lever. |
+| 7.7 | ✅ **DONE (2026-07-30)** — three free CV themes plus five Premium themes, enforced by account entitlement and clearly locked in the picker | **P3** | **S** | 4.3, 7.2 | Existing Premium-theme CVs remain editable and exportable after downgrade so user data is never held hostage. |
 | 7.8 | **DONE (2026-07-30)** — CI runs NuGet transitive vulnerability reporting and a production-only npm audit. The npm audit reports the existing no-fix advisory baseline without blocking unrelated deploys. | **P2** | **S** | none | Vulnerable dependencies are now visible before deployment. |
 | 7.9 | **Per-user AI provider cost controls** | **P3** | **S** | 5.2, 7.2 | With `AI_PROVIDER=gemini` the "advanced AI" tier spends real money per call. Metering (5.2) measures; this enforces. |