fix(workspace): complete split preview and bulk document actions

[ThisIs-Developer]

What changed

• Run the shared post-processing pipeline in the right-hand document split preview.
• Render Mermaid, WaveDrom, Vega-Lite, PlantUML, D2, Graphviz, Markmap, LaTeX/MathJax, ABC notation, GeoJSON, TopoJSON, and 3D STL models in either preview pane.
• Keep asynchronous renderer work independently current so one pane cannot overwrite or cancel the other pane's pending output.
• Share Leaflet and Three.js loading with the primary preview, update split map/model themes, and dispose map/WebGL resources when split content changes or closes.
• Reuse renderer loading, retry, error-state, and viewer-toolbar behavior while ignoring stale split results after a document changes or closes.
• Add Open all and Move to… to the context menu when multiple documents are selected in the Explorer.
• Keep mixed file/folder bulk selections limited to the existing safe delete action.

Why

The secondary document preview parsed and sanitized Markdown but did not invoke the asynchronous post-processing used by the main preview. Advanced content therefore stayed as raw LaTeX, raw map/model source, or on placeholders such as Rendering Mermaid…, Rendering WaveDrom…, and ABC's loading state.

The Explorer's multi-selection menu was also hard-coded to a single delete action, preventing common bulk workflows.

Impact

Advanced content—including interactive maps and 3D STL canvases—now renders normally on both sides of document split preview mode without leaving hidden renderer resources behind. Users can also open or relocate a multi-document selection in one action, including moves that use the existing Secret Workspace unlock and persistence flow.

Validation

• node --check script.js
• git diff --check
• Rich-content and Explorer browser coverage: 25 passed, including split GeoJSON/TopoJSON/STL rendering, LaTeX/ABC split rendering, and functional bulk open/move scenarios
• Split-view open/close interaction: 1 passed
• Math review/typesetting regression: 1 passed
• One unrelated pre-existing header-control expectation remains stale in the local split/tab harness

Fixes #227

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
markdown-viwer	Ready	Preview, Comment	Jul 27, 2026 10:03am

[cloudflare-workers-and-pages]

Deploying markdownviewer with    Cloudflare Pages

Latest commit:	4d9fce3
Status:	✅  Deploy successful!
Preview URL:	https://460f4a48.markdownviewer.pages.dev
Branch Preview URL:	https://agent-fix-mermaid-split-view.markdownviewer.pages.dev

View logs