The old flex spacer split the header in half, boxing the strip into the
middle while tabs shrank to slivers; the spacer now renders only for
the VS Code and surface-title layouts, tabs keep a fixed width (w-44)
and the strip scrolls behind the right-side buttons. Every tab gains a
hover-revealed close button next to the menu; the active tab's menu is
hover-revealed too (it was always visible) — the header passes it into
the strip so both overlays behave identically. The active tab's inner
padding matches inactive tabs.
Uniform compact tabs (h-7, 6px radius, 13px medium) that share the strip
width and shrink before scrolling, thin separators between inactive
neighbours that disappear around the active or hovered tab, a
hover-revealed menu button anchored to the tab's end, a soft selection
pill for the active tab, and hidden scrollbars with fade edges. The
active tab is single-line: the project/branch meta row stays only in the
VS Code header, which keeps the plain title.
Web/desktop header replaces the single session title with a strip of
soft pill tabs, one per session the user has opened (sidebar, palette
or deep link — opening anywhere adds a tab once). The active tab is the
familiar title block — rename, meta row and the full session menu —
inside a gently selected pill; a brand-new draft shows as a transient
pill until its session exists. Inactive tabs show the title with a
hover-revealed "..." menu (close tab, close other tabs, copy id) that
nudges the text like sidebar rows, and close by middle-click too.
Tabs drag to reorder, scroll behind the right-side header buttons with
soft fade edges, respect the reserved window-controls inset, and
persist across reloads. Closing the active tab activates its neighbour
(or opens a new draft when it was the last). Tab ids whose session is
not in the loaded list stay stored but hidden, so a partial session
list never destroys the working set. VS Code keeps the plain title;
mobile is untouched.