emrg: GUI settings panel title + remove duplicate sidebar settings-btn (rant 21:49:51)

[argszero]

Fixes host rant 2026-08-13T21:49:51: the settings workspace view had no heading (unlike the Rant/Project/Task panels getting .workspace-view-title in the parallel panel restyle), and the sidebar footer carried a redundant 设置 button duplicating the nav gear entry.

Changes:

• index.html: add <h2 class="workspace-view-title" data-i18n="settings.title">设置</h2> to #panel-settings; remove #settings-btn from .sidebar-footer (keep #status-dot connection indicator — it's independently useful)
• app.js: drop the dead \$"settings-btn" click binding
• i18n.js: remove orphaned sidebar.settings keys (zh/en); settings.title already existed
• layout.css: add .workspace-view-title styles — the class was referenced by the parallel panels' titles without a definition anywhere
• renderer.smoke.test.js +1 test: settings title present in index.html source, no settings-btn in footer/JS/i18n (GUI 241→242, Agent.md synced 118 renderer smoke)

Verified: GUI 242/242, pytest 801/801, import + CLI OK.

[argszero]

✅ LGTM — cycle (1/3)

Verified head 8a2d26b (6 files +32/-12 incl. symlink cleanup):

• index.html: settings panel gains h2.workspace-view-title[data-i18n=settings.title]; sidebar-footer keeps #status-dot only.
• app.js settings-btn binding removed; i18n.js sidebar.settings orphan keys removed (settings.title already existed in both locales).
• layout.css adds the .workspace-view-title definition — previously referenced by the parallel panels' titles with no CSS anywhere.
• renderer.smoke +1 (GUI 242, Agent.md synced 118 renderer smoke); pytest 801/801; CI test + test-windows PASS (run 31709155858).

[argszero]

✅ LGTM — cycle (2/3, head 8a2d26b)

Fresh independent verification this cycle (full-diff + greps on head):

• index.html: settings panel gains <h2 class="workspace-view-title" data-i18n="settings.title">; sidebar-footer keeps only #status-dot (settings-btn removed).
• app.js: $("settings-btn") binding removed; nav-click path (switchView("settings")) still calls loadEvolutionSummary() + Dialogs.showSettings() — feature preserved, button was a true duplicate.
• i18n.js: sidebar.settings orphan keys removed (zh+en); settings.title present in both locales (verified).
• layout.css: .workspace-view-title definition added (font-size/weight/color/margin) — used by the new settings heading.
• Full-tree grep: settings-btn → 0 refs, sidebar.settings → 0 refs.
• Agent.md 241→242 (+1 renderer smoke 117→118) consistent; CI test + test-windows PASS (run 31709155858); 3-dot diff = exactly 6 files +32/-10; mergeable.

One note: the layout.css comment says the class unifies settings/Rant/projects/tasks panel titles, but only the settings panel uses it so far (the other panels use .hint divs, no h2). Not dead code (it styles the new heading); fine as-is — the other panels can adopt it later.

[argszero]

✅ LGTM — cycle (3/3, fresh cycle)

Independent re-verification on head 8a2d26b vs master c9c400f:

• Diff = 6 files +32/-10: settings panel h2.workspace-view-title (data-i18n=settings.title), sidebar-footer keeps #status-dot only, app.js settings-btn binding removed, i18n sidebar.settings orphan keys removed (settings.title already existed in both locales), layout.css .workspace-view-title definition added (was referenced by parallel panels' titles without CSS).
• GUI suite 242/242 incl. new source-level test; pytest 801/801; CI test + test-windows PASS (run 31709155858).
• Merge gate satisfied: 3 consecutive ✅ from different cycles (14:16:22Z, 14:21:06Z, this one), no ❌.