Unified Settings modal: Layouts and UI toggles — Parent Tracking Issue

[mfittko]

This parent issue tracks the feature described in the PRD and task list.

Docs

• PRD: tasks/prd-share-panel-layouts-and-toggles.md
• Task list: tasks/tasks-prd-share-panel-layouts-and-toggles.md

Summary
Open a Unified Settings modal (Settings button) with tabs (General / View / Share) to configure shareable layouts and UI toggles, producing URLs (and iframe embed) that preconfigure the app on load.

Key requirements (updated)

• Layouts: default, noninteractive (shows content but disables interactions; hides UI by precedence)
• Toggles: funcControls, fullscreen, tools, zoom, unitCtl, header, admin, lang
• URL params parsed/applied before first render; live toggles update URL immediately; admin/layout/lang apply on modal close
• Embed code generation (iframe) reflecting current options
• Chrome-only E2E coverage; unit coverage for URL parse/serialize and precedence

Acceptance Criteria (high-level)

• Unified Settings modal with layout picker, toggles, language select, copy/reset, and embed snippet
• layout=noninteractive shows content, hides all UI, and disables interactions
• Live toggles update UI immediately; admin/layout/lang applied on modal close
• URL updates live in response to changes

[mfittko]

Sub-issues checklist:

• [1/5] Define Share View options and URL schema #8 Define Share View options and URL schema
• [2/5] Share Panel UI (modal/tab) with layout picker, toggles, language select, copy link, embed code #9 Share Panel UI (modal/tab) with layout picker, toggles, language select, copy link, embed code
• [3/5] Apply ShareViewOptions app-wide (precedence + noninteractive shows content) #10 Apply layouts/toggles app-wide (precedence + noninteractive locking)
• [4/5] i18n + accessibility integration for Unified Settings modal (Share tab) and language preselect #11 i18n + accessibility integration for Share panel and language preselect
• [5/5] Tests (Chrome E2E + unit) and docs updates (Unified Settings modal) #12 Tests (Chrome E2E + unit) and docs updates

Docs

• PRD: tasks/prd-share-panel-layouts-and-toggles.md
• Task list: tasks/tasks-prd-share-panel-layouts-and-toggles.md