feat: streamline content channel tabs

docs/TASKS/content/008-multi-channel-preview-editor.md

@@ -15,12 +15,12 @@ The editor should use one shared content body for every selected target channel,
 - Keep content item editing in `frontend/src/features/content/views/ContentItemDetailView.vue`.
 - Replace per-channel caption editing with a shared caption and shared hashtags.
 - Let configured workspace channels be selected or unselected as targets.
-- Show selected targets in a vertical rail and render preview cards that look closer to social platform previews.
+- Show target channels as a single vertical tab rail and render preview cards that look closer to social platform previews.
 - Convert shared hashtags into chip-style entry with suggestions from already used hashtags.
 - Show a workspace hashtag feed so authors can reuse existing tags.
 - Keep the editor focused on post text and target channels by removing confusing title, calendar, change summary, and base-caption fields.
 - Make target preview tabs compact.
-- Move the create content entry point into the main app menu.
+- Move the create content entry point into the top app menu bar.
 - Preserve existing save payloads and backend contracts.
 
 ## Validation
@@ -40,5 +40,5 @@ npm run build
 - [x] Already used hashtags are available as suggestions.
 - [x] The editor shows a workspace hashtag feed with usage counts.
 - [x] The editor no longer shows title, calendar, change summary, or base-caption fields.
-- [x] Target channel preview tabs use compact buttons.
-- [x] Create content is available from the main app menu.
+- [x] Target channel tabs use compact icon-only buttons with channel names as accessible labels and tooltips.
+- [x] Create content is available from the top app menu bar.