Merge lab into refactor/routes-email-subpackage

specs/settings-admin.md

@@ -20,7 +20,7 @@ This spec covers settings and admin surfaces in:
 - `routes/model_routes.py` for `/api/tools` and settings-bound model endpoint references;
 - `src/agent_tools/admin_tools.py`, `src/tool_implementations.py`, `src/tool_execution.py`, `src/tool_schemas.py`, and `src/tool_index.py` for `manage_settings`;
 - `src/agent_loop.py` for stale agent prompt references to settings APIs;
-- frontend modules `static/js/appConfig.js`, `static/js/settings.js`, `static/js/settings/{registry,navigation,lifecycle,search,dom,sidebar}.js`, `static/js/admin.js`, `static/js/presets.js`, `static/js/theme.js`, and `static/js/storage.js`;
+- frontend modules `static/js/appConfig.js`, `static/js/settings.js`, `static/js/settings/{registry,navigation,lifecycle,search,dom,sidebar,shell,peek,oauthReturn}.js`, `static/js/admin.js`, `static/js/presets.js`, `static/js/theme.js`, and `static/js/storage.js`;
 - CLI helpers `scripts/odysseus-preset` and `scripts/odysseus-theme`.
 
 Generic API integrations are cross-referenced in `integrations.md`. Model endpoint CRUD and endpoint cleanup are covered in `llm-models.md`. Email/contact/calendar legacy setting fallbacks stay with their domain specs.
@@ -75,7 +75,7 @@ Admin gates inherit the auth contracts in `auth-security.md`: normal deployments
 - bundled accessibility font selection such as OpenDyslexic and text-size variable application;
 - CSS variable application.
 
-`static/js/settings.js` owns domain panel load/save behavior and compatibility exports, while `static/js/settings/registry.js` is the canonical group/panel metadata inventory. `navigation.js` activates panels and lazy admin content, `search.js` implements the registry-backed finder while filtering admin-only entries, `lifecycle.js` owns modal open/close/Escape/drag/docking behavior, `sidebar.js` owns persisted collapse/resize state, and `dom.js` holds shared DOM helpers. Registry/DOM consistency is a tested contract; new panels must update both the registry metadata and actual DOM. `static/js/appConfig.js` shares one promise cache for settings and tool reads across frontend modules, consumes a login-page settings prefetch once, drops rejected promises for retry, and requires settings/tool writers to invalidate the matching cache; `/api/tools` writes invalidate both entries because disabled tools live in settings state.
+`static/js/settings.js` owns domain panel load/save behavior and compatibility exports, while `static/js/settings/registry.js` is the canonical group/panel metadata inventory. `navigation.js` activates panels and lazy admin content, `search.js` implements the registry-backed finder while filtering admin-only entries, `lifecycle.js` owns modal open/close/Escape/drag/docking behavior, `sidebar.js` owns persisted collapse/resize state, and `dom.js` holds shared DOM helpers. `shell.js` owns the coordination above those primitives — per-panel activation side effects, the admin-controller handoff, `.admin-only` visibility, and the public `open()`/`close()` entry points — holding no panel state of its own and taking what it needs from `settings.js` as injected callbacks. `peek.js` owns the Appearance window-fade chrome and clearing it when the user leaves that panel, and `oauthReturn.js` owns the once-per-load return path from the Google OAuth redirect into the Integrations panel. Registry/DOM consistency is a tested contract; new panels must update both the registry metadata and actual DOM. `static/js/appConfig.js` shares one promise cache for settings and tool reads across frontend modules, consumes a login-page settings prefetch once, drops rejected promises for retry, and requires settings/tool writers to invalidate the matching cache; `/api/tools` writes invalidate both entries because disabled tools live in settings state.
 
 Settings panels cover provider/model/search/research/reminder/email/CalDAV/CardDAV/vault, accessibility/font/text-size, scoped tokens, and unified integrations. The hidden legacy fallback editor was removed; no current Settings panel exposes the new foreground fallback keys, so opt-in exists only through owner-scoped preferences/internal callers until a deliberate UI is added. Email OAuth connect preserves the selected SMTP security mode and returns to the Settings surface after callback. `static/js/admin.js` owns user/admin panels, model endpoints, builtin tool toggles, MCP forms, feature toggles, token/webhook panels, diagnostics, backup/import, and danger-zone wipes.
 
@@ -184,7 +184,7 @@ Current targeted coverage includes settings store fallback/error paths, settings
 - Add diagnostics tests for broader error redaction and sensitive output limits.
 - Add admin wipe tests for every wipe kind, unknown-kind 400, rollback behavior, and admin gating.
 - Add vault route tests for session omission, permission setting, login/unlock failures, lock/logout clearing, corrupt config, and admin gates.
-- Add broader frontend behavior coverage for Settings/Admin panel save/load flows, vault password clearing, diagnostics buttons, cleanup/wipe confirmations, custom font/theme wiring, and tab state; registry/navigation/finder/lifecycle contracts now have focused source/JS tests.
+- Add broader frontend behavior coverage for Settings/Admin panel save/load flows, vault password clearing, diagnostics buttons, cleanup/wipe confirmations, custom font/theme wiring, and tab state; registry/navigation/finder/lifecycle contracts now have focused source/JS tests, and the real-ESM coordinator smoke in `tests/helpers/test_settings_shell_coordinator.mjs` additionally covers the shell's admin-only visibility, admin-controller handoff and Peek fade/clear behavior.
 - Decide whether `user_templates` and `group_presets` should remain shared despite user-facing names.
 - Decide whether backup/import should preserve explicit owner fields or force imported owner ownership.
-- Continue moving shell/navigation concerns out of the still-large `static/js/settings.js` and `static/js/admin.js` domain boundary without duplicating registry ownership.
+- Continue decomposing the still-large `static/js/settings.js` (5,583 lines) and `static/js/admin.js` (4,122 lines) without duplicating registry ownership. The shell and navigation concerns now live in `static/js/settings/`; what remains in `settings.js` is panel code, and `initUnifiedIntegrations()` alone is ~2,140 lines of it. `admin.js` has no extracted shell of its own yet.