move branding settings from Theme tab to Site tab

- Add branding_editor component to site_editor.ex with:
  - Shop name input
  - Show shop name / Show logo toggles
  - Logo upload (size slider, SVG recolor, color picker)
  - Header background toggle and upload (zoom, position sliders)
- Add site_ prefixed event handlers in page_editor_hook.ex:
  - site_update_branding, site_toggle_branding, site_update_color
  - site_remove_logo and site_remove_header (delegate to theme handlers)
- Remove branding sections from theme_editor.ex:
  - Deleted shop_name_input, branding_section, logo/header upload sections
- Theme tab now shows only: preset grid, accent colours, customise accordion

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/plans/editor-reorganisation.md

@@ -213,8 +213,8 @@ end
 | 14 | Footer nav: read from database | 13 | 30m | done |
 | 15 | Footer content: about, copyright, newsletter toggle | 4 | 45m | done |
 | 16 | Footer: read new fields | 15 | 30m | done |
-| 17 | Move branding settings from Theme to Site | 4 | 1h | planned |
-| 18 | Theme tab: remove branding, polish remaining | 17 | 30m | planned |
+| 17 | Move branding settings from Theme to Site | 4 | 1h | done |
+| 18 | Theme tab: remove branding, polish remaining | 17 | 30m | done |
 | 19 | Merge page settings into Page tab | — | 45m | planned |
 | 20 | Remove Settings tab | 19 | 15m | planned |
 | 21 | Polish: responsive, empty states, validation | 1-20 | 1.5h | planned |
@@ -300,6 +300,34 @@ Header and footer navigation items are managed through a unified `nav_editor` co
 - `lib/berrypod_web/page_editor_hook.ex` - Event handlers, sync functions, dirty state
 - `assets/css/admin/components.css` - Styles for nav editor
 
+### Completed: Branding Migration (Tasks 17-18)
+
+Moved branding settings from Theme tab to Site tab.
+
+**What moved:**
+- Shop name input
+- Show shop name / Show logo toggles
+- Logo upload (file picker, size slider, recolor toggle, color picker)
+- Header background toggle
+- Header image upload (file picker, zoom slider, position sliders)
+
+**Event routing:**
+- Site tab branding events use `site_` prefix (e.g., `site_update_branding`, `site_toggle_branding`)
+- These route to the same underlying theme state (`theme_editor_settings`, `theme_editor_logo_image`, etc.)
+- Logo/header uploads still use `theme_logo_upload` and `theme_header_upload` (shared with theme save flow)
+- `site_remove_logo` and `site_remove_header` delegate to theme action handlers
+
+**Files modified:**
+- `lib/berrypod_web/page_renderer.ex` - Pass branding props to site_editor
+- `lib/berrypod_web/components/shop_components/site_editor.ex` - Add `branding_editor` component with logo/header upload sections
+- `lib/berrypod_web/page_editor_hook.ex` - Add `site_update_branding`, `site_toggle_branding`, `site_update_color`, `site_remove_logo`, `site_remove_header` handlers
+- `lib/berrypod_web/components/shop_components/theme_editor.ex` - Remove `shop_name_input`, `branding_section`, logo/header upload sections
+
+**Theme tab now contains:**
+- Preset grid (8 themes)
+- Accent, hover, sale colours
+- Customise accordion with typography, colours, layout, shape, products, product page groups
+
 ## UI Wireframes
 
 ### Site tab layout