v0.11.1

Hotfix: canonical /p/ post links now resolve correctly

0.11.0 introduced canonical /p/:id post permalinks, but the viewer's client-side router still only understood the legacy /s/:id shape. Direct /p/:id links could load the app shell and then fall back to the workspace instead of opening the post.

This patch completes that migration:

• The viewer parses both /p/:id and legacy /s/:id links.
• Session deep links parse both /session/:sessionId/p/:postId and /session/:sessionId/s/:postId.
• CLI, MCP, viewer copy-link/open-as-image, canonical tags, Open Graph tags, and the pi extension now emit canonical /p/ links.
• Screenshot routes accept both /p/:id.png and /s/:id.png.

Legacy /s/ links remain supported inbound, so existing shared links keep working.