feat(admin,shop-admin): content/brand management + merchant shop profile (add-content-admin-ui)

openspec/specs/frontend-shop-admin/spec.md

@@ -64,3 +64,22 @@ Shop-admin SHALL expose the shared accent preset control (`red`, `blue`, `teal`,
 - **WHEN** an authenticated shop user opens shop-admin
 - **THEN** they can select an accent preset without leaving the current page
 
+### Requirement: Merchant shop profile editing
+Shop users SHALL edit their own shop's profile from a shop-admin page reachable from the shop-scoped navigation, through the shared API adapter's shop-scoped profile update. The form SHALL prefill from the shop's current profile and cover the merchant-writable fields only: logo and banner URLs, company, region, and `{ en, zh }` bilingual address, notice and after-sale copy. Bilingual fields SHALL be validated with non-empty `en` and `zh` text before any request is sent, every write SHALL target the caller's own shop, and profile scores SHALL NOT be editable — they remain platform-set and saving never changes them. Saves SHALL give clear success feedback; a refused save SHALL keep the form values and show a visible failure message.
+
+#### Scenario: merchant updates their own profile
+- **WHEN** a shop owner edits their notice, saves, and the mall store page reloads
+- **THEN** only that shop shows the new notice and no other shop's profile changes
+
+#### Scenario: incomplete bilingual text is blocked before submit
+- **WHEN** a shop owner leaves the `zh` after-sale text empty and saves
+- **THEN** the field shows an inline error and no update request is sent
+
+#### Scenario: scores are not editable
+- **WHEN** the profile page loads and is saved
+- **THEN** no score fields are offered and the platform-set scores remain unchanged
+
+#### Scenario: refused save keeps the form
+- **WHEN** the API refuses an update
+- **THEN** the page keeps the entered values and shows a failure message
+