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Claudia[bot]
c01edcbbb8
The header tab strip stops working past roughly a dozen sessions: it wraps into two or three rows, eats vertical space and still cannot be scanned. This adds a vertical session list in a left <aside> as an ALTERNATIVE layout — a filter box, a live count, and a 44px collapsed rail that keeps the ambient signal (status dot, task badge) visible. The strip is not removed. Settings -> Display -> Tab Bar -> Session List Layout switches between them and the default stays 'header', so existing users see no change until they opt in. Structure: one #sessionTabs element, two mount points. applySessionListLayout() re-parents the SAME node between #sessionTabsHost and #sessionSidebarList, which is why there is no second renderer and no duplicated wiring — app.$() caches getElementById results and never invalidates them, so a moved node keeps every existing consumer (settings-ui, webview-tabs, the generated gesture bundle, the mobile tests) working untouched. Notable integration points: - Below 1024px the sidebar is an off-canvas drawer overlaying the terminal; closed it gets inert + aria-hidden so it cannot be tabbed into, and touch swipes over it no longer switch sessions. - Subagent and ultracode windows anchor to the right edge of a sidebar row instead of its bottom, connector curves follow. - Alt+B toggles; the chord is gated out of the PTY so xterm cannot also write ESC b into a live session. - Collapse state lives in its own localStorage key (the settings blob is rebuilt from DOM controls on every save) and falls back to in-memory intent where storage throws. Verified: frontend syntax + public asset checks, tsc, eslint, 26 new jsdom tests, and a headless-Chromium harness (scripts/verify-session-sidebar.mts) that renders a synthetic 25-session fleet in both layouts at 1600/1000/393px and asserts mount point, widths, inert/aria state and row count. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>