d0c0c33abf
Closes https://github.com/zed-industries/zed/issues/46926 ## Description: - Fixes the missing right border on pinned tabs when `show_pinned_tabs_in_separate_row` is enabled. The two-row tab bar layout was missing the border element that visually separates the pinned tabs row. This border was present in the single-row layout but was not added when implementing the two-row layout. ## Steps to reproduce 1. Enable `"tab_bar": { "show_pinned_tabs_in_separate_row": true }` in settings 2. Open multiple files 3. Pin at least one tab (right-click → Pin Tab) 4. Notice pinned tabs are missing right-hand side border **Before (bug):** <img width="1060" height="186" alt="image" src="https://github.com/user-attachments/assets/7d18f24d-a51b-4f13-8410-a15fa92e1bb3" /> **After (fixed):** <img width="863" height="69" alt="image" src="https://github.com/user-attachments/assets/3354e809-b298-49a1-b16a-871caef67176" /> ## Test plan - [x] Follow reproduction steps above and verify the border now appears - [x] Verify border appears immediately (not just after drag-and-drop) - [x] Verify single-row layout still works correctly when setting is disabled - [x] Added automated test `test_separate_pinned_row_has_right_border` ### Additional fix: Drag-and-drop to pinned tabs bar During implementation, discovered that we couldn't drag tabs to the end of the pinned tabs bar. This PR also adds: - A drop target at the end of the pinned tabs row - Proper pinning behavior when dropping unpinned tabs to the pinned area - Keeps the dragged tab active after drop Release Notes: - Fixed the missing right border on pinned tabs when `show_pinned_tabs_in_separate_row` is enabled. - Fixed drop target at the end of the pinned tabs row - Fixed pinning behavior when dropping unpinned tabs to the pinned area - Fixed case when the dragged tab was not active after drop (when enable `"tab_bar": { "show_pinned_tabs_in_separate_row": true }` in settings) --------- Co-authored-by: Joseph T. Lyons <JosephTLyons@gmail.com> Co-authored-by: Danilo Leal <daniloleal09@gmail.com>