Replace iFrame-based split-screen with native Svelte components:
Infrastructure (6 files):
- registry.ts: lazy-import registry for all 25 app modules
- store.svelte.ts: Svelte 5 runes state (app, position, localStorage)
- SplitPaneLayout.svelte: dual-panel layout with dynamic widths
- ResizeHandle.svelte: draggable divider with mouse/touch support
- PanelHeader.svelte: app name + close button
- index.ts: barrel exports
AppView.svelte for all 25 modules — compact self-contained views:
- todo: task list with filters + quick add
- calendar: mini week strip + today's events
- contacts: searchable list with avatars
- chat: conversation list with previews
- And 21 more...
Benefits over iFrame approach:
- Shared IndexedDB — both panels see the same data
- Svelte reactivity across panels
- No CORS/CSP issues
- Code-split via dynamic imports
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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