michael-s-molina opened a new pull request, #38846:
URL: https://github.com/apache/superset/pull/38846

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   ### SUMMARY
   The `hideTab` option in the Superset Embedded SDK's `dashboardUiConfig` was 
silently ignored — passing `hideTab: true` had no effect on the dashboard tab 
bar.
   
   **Root cause:** `DashboardBuilder.tsx` was rendering the top-level tab bar 
conditioned on `!uiConfig.hideNav` (bit 4) rather than `!uiConfig.hideTab` (bit 
2). The `hideTab` flag was correctly parsed from the URL bitmask by 
`UiConfigContext` but never read anywhere in the component tree.
   
   **Fix:** Add `!uiConfig.hideTab` to the render condition in 
`DashboardBuilder.tsx` alongside the existing `!uiConfig.hideNav` check. This 
is fully backward-compatible — `hideNav` continues to suppress the tab bar as 
before, and `hideTab` now works as documented.
   
   ### TESTING INSTRUCTIONS
   1. Set up a dashboard with top-level tabs (multiple tabs at the root level).
   2. Embed the dashboard using the SDK with `dashboardUiConfig: { hideTab: 
true }`.
   3. **Before:** Tab bar renders regardless of the flag.
   4. **After:** Tab bar is hidden; only the content of the active tab is shown.
   
   ### ADDITIONAL INFORMATION
   <!--- Check any relevant boxes with "x" -->
   <!--- HINT: Include "Fixes #nnn" if you are fixing an existing issue -->
   - [ ] Has associated issue:
   - [ ] Required feature flags:
   - [ ] Changes UI
   - [ ] Includes DB Migration (follow approval process in 
[SIP-59](https://github.com/apache/superset/issues/13351))
     - [ ] Migration is atomic, supports rollback & is backwards-compatible
     - [ ] Confirm DB migration upgrade and downgrade tested
     - [ ] Runtime estimates and downtime expectations provided
   - [ ] Introduces new feature or API
   - [ ] Removes existing feature or API
   


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