[arjayby]

Adds six collaborative examples so developers can try shared application state beyond the existing plain-text editor. Each example uses the same account, room, access, connection, and save controls, with navigation that keeps the current room.

Example	Included behavior
Kanban board	Shared cards, drag-and-drop columns, card editing activity, and local undo
Whiteboard	Sticky notes and shapes, smooth live cursors and drag previews, selections, zoom, and object editing
Rich-text editor	Collaborative formatting, lists, links, text carets and selections, and local undo
Multiplayer form	Shared project briefs, character-level text merging, active-field presence, validation, and live previews
Flowchart builder	Process, decision, and start/end nodes; labeled branches; connected arrows; live cursors and node selections
Collaborative table	Shared text cells, editable columns, row/column controls, cell presence, keyboard navigation, and multi-cell paste

All examples keep their data separate within a room, enforce viewer permissions, merge offline changes after reconnecting, and recover saved state after a server restart. The plain-text editor remains available. The canvas examples use participant-colored cursors with white name labels, and empty CodeMirror fields place remote carets at the start of their placeholders.

The production build and Phoenix routes include every example. README instructions describe their behavior, data models, and limitations. These are examples: the flowchart does not execute workflows, the form does not submit to an external service, and the table uses text cells without formulas.

Validation:

• npm test: 22 SDK and model tests passed.
• Full Playwright suite: 59 browser tests passed, including two-client synchronization, offline merging, crash recovery, permissions, mobile layouts, cursor positioning, and canvas motion.
• mix test: 58 tests passed, including routes for all packaged example pages.
• npm run test:package: package contents, ESM imports, shared Yjs, TypeScript declarations, and a consumer Vite build passed.
• mix format --check-formatted, npm run build, and git diff --check passed.