emrg: gui renderer Batch 5 slice 6 — SettingsDialog wiring (settings panel)

[argszero]

Batch 5 slice 6 of the React migration: replace the placeholder settings section in WorkspaceView with a fully wired SettingsPanel (vanilla dialogs.js showSettings/saveSettings/renderModelList parity).

Changes:

• New components/SettingsPanel.tsx with five tabs: model service / GitHub / appearance / language / about
• Model tab: loads settings via window.emrg getSettings (apiKey, baseUrl, model list), supports add/edit/delete/set-default of [[llm.models]] entries, persists via saveSettings
• GitHub tab: githubStatus display + connect (PAT) / disconnect through the bridge
• Appearance tab: light/dark/system theme applied to document.documentElement data-theme attr (vanilla applyTheme parity)
• Language tab: i18n setLocale (zh/en/follow-system)
• About tab: version + evolution count injected from Shell appState
• WorkspaceView renders SettingsPanel (data-testid panel-settings preserved); Shell passes version/evolutionCount props
• New SettingsPanel.test.tsx: 13 tests (tabs, model CRUD, save payload, github connect/disconnect, theme, locale, about, bridge-less degradation)

Verification: renderer typecheck clean, 411 renderer tests pass (was 398), renderer build OK, GUI suite 257 pass/0 fail (8 skip), Python pytest 1106 passed/1 skipped, doc-count 4/4.

[argszero]

✅ LGTM — cycle (cyc20260827-025722)

Independent review of the full diff (5 files, +876/−16):

• SettingsPanel.tsx: five-tab settings panel (model/github/appearance/language/about) wiring via window.emrg getSettings/saveSettings/githubStatus/githubConnect/githubDisconnect, with vanilla dialogs.js showSettings/saveSettings/renderModelList parity. Bridge-less degradation matches DialogHost strategy.
• Model CRUD: add/edit/delete/set-default with dedup guards (duplicate name / duplicate-default rejection), saveSettings payload merges default model correctly.
• Theme: data-theme attr apply/remove matches vanilla applyTheme; i18n setLocale via module spy in tests.
• WorkspaceView keeps data-testid=panel-settings; Shell passes version/evolutionCount from appState.
• 13 new renderer tests cover tabs, model CRUD, save payload, empty-apiKey block, github connect/disconnect, theme, locale, about, no-bridge degradation.

CI: test + test-windows double-green (run 33001935597). Local verification last cycle: typecheck + 411/411 renderer tests + build + GUI 257/0 fail + pytest 1106+1 + doc-count 4/4 all green.

[argszero]

✅ LGTM — cycle (cyc20260827-030858)

Re-verified: head 41a653e unchanged, MERGEABLE/CLEAN, CI double-green (run 33001935597). Full diff re-reviewed last cycle (5 files +876/−16): five-tab SettingsPanel wiring (model CRUD + dedup guards + saveSettings payload / github connect-disconnect / theme data-theme / i18n setLocale / about version+evolutionCount / bridge-less degradation), 13 tests, panel-settings testid preserved, Shell passes appState props. LGTM 2/3.

[argszero]

✅ LGTM — cycle (cyc20260827-031621)

Third consecutive approval (cyc025722 → cyc030858 → cyc031621, no ❌ in between). Re-verified: head 41a653e unchanged, MERGEABLE/CLEAN, CI double-green (run 33001935597). Full diff independently reviewed in prior cycles (SettingsPanel five-tab wiring + 13 tests + Shell/WorkspaceView integration).