Implement View Entry Render

Goal

Implement P0 read-only render operations for Markdown entries and declarative page views.

Sources

• architecture/forma-p0-operation-api-spec
• architecture/forma-core-technical-direction
• product/forma-p0-starter-spec

Context

The P0 WebApp should read through operations, not directly from files. Entry rendering and view rendering are separate operation surfaces so inspection can stay metadata-focused.

In Scope

• Implement file.render with format: "html" for WebApp use.
• Implement view.render for P0 page views.
• Render table views from space entries, columns, and sort definitions.
• Render kanban views from space entries and column query.all filters.
• Support <!-- forma-view --> as the view mount point.
• Render Obsidian-style embeds as links or placeholders, not expanded content.
• Add golden tests for table, kanban, entry HTML, missing mount points, invalid view fields, and unresolved references.

Out Of Scope

• Markdown export as a primary render pipeline.
• Embedded views.
• Transclusion expansion.
• Drag/drop mutation or onDrop.
• Rich Markdown editing.

Acceptance Criteria

• file.render and view.render return stable JSON result shapes.
• P0 starter views render with zero entries and with fixture entries.
• Invalid views produce structured diagnostics.
• Rendered output does not persist to disk or enter any persistent index artifact.

Relationship Notes

Blocked by parser, check/index, and operation dispatch foundation.

Open Questions

• Exact HTML sanitization/rendering library choice can be made during implementation.