Introduce a shared dialog header style (.unified-dialog-header) in app.css and opt dialog components into the new chrome by updating their header markup. Headers now use unified-dialog-icon and unified-dialog-text elements (and import the matching Lucide icons where needed), which standardizes icon placement, title/eyebrow layout, close button styling and responsive behavior. The Command Palette layout was adjusted to include the new header and its grid rows.
The CSS is explicitly opt-in (so page/section headers remain unchanged) and includes hover/focus styles and a theme-sensitive close color variable. This commit is a UI refactor only — no API or behavior logic changes.
Introduce a modal dialog to configure and confirm branch merges. It
replaces the old prompt-based workflow and lets users choose a merge
strategy with localized labels. Confirming the dialog runs the merge,
refreshes views, and clears the pending merge target.
- Add a merge dialog UI with strategy options and keyboard support.
- Replace prompt-based merge flow with a state-driven confirm dialog.
- Include CSS for dialog layout, responsive sizing, and styling.
Christoph