The modal had grown to 8 tabs that wrapped onto two rows on desktop and
became a horizontal scroller on phones, with a "Display" mega-tab holding
11 sections and ~35 controls. Local Echo sat 60% down it, and the model
settings were split across two tabs whose three controls fought each
other (the 1M Opus toggle's own hint said it was "ignored when a Claude
Model is selected above").
Replaced with a left rail that is a TABLE OF CONTENTS over one scrolling
document: every section stays mounted, the rail follows the scroll, and
find-in-page works across the whole thing. Nine sections:
Terminal & Input (Local Echo is the first row of the first section)
Appearance, Header & Panels, Models, Agents & CLIs,
Notifications, Voice, Shortcuts, System
Models are now one page. The picker is a card grid of BASE models with a
single "1M context window" switch; context becomes a property of the
chosen model and composes back into `claudeModel` as `base + [1m]`, which
retires the precedence trap. Thinking effort is a segmented control on
the same page, and the old Models tab (task routing) becomes a collapsed
Advanced block under it.
The 12 header-button toggles and the 8 panel toggles become chip grids,
which is most of the old Display tab reclaimed. Rows now say whether a
setting is per-device or synced, stated once per group.
Phones drop the rail for a sticky jump pill that names the current
section and opens a jump list, move Save into the header (the bottom
action bar cost 60px), and render groups as one inset rounded list with
hairline dividers instead of a stack of bordered cards.
Load and save are untouched: every control keeps its id, so
openAppSettings()/saveAppSettings() work as before. Model cards and the
effort segment are views over hidden <select>s that stay the source of
truth. test/app-settings-structure.test.ts pins that contract, plus the
rail hooks admin-ui.js injects the multi-user Users section into.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>