Vendor CodeMirror's show-hint add-on and wire deterministic, schema-driven
completion into the markdown front-matter pane — NO heuristics, no AI; every
candidate comes from the converter's own field list.
- Vendor codemirror-show-hint.min.{js,css} (CM 5.65.x add-on); concat in
browse/build.sh after the core CM bundle so it extends window.CodeMirror.
- Server: add a structured `values` enum to convert.FrontMatterField (doctype →
report/letter/specification, numbering → true/false), exposed via the existing
/.api/frontmatter JSON. Tracks the template set; keeps the server as the
single source of truth instead of parsing the hint prose.
- Client: frontMatterHints() completes recognised KEYS at line start (excluding
the filename-driven identity keys and keys already present) and enum VALUES
after `key:`. Picking an enum key auto-opens its value list. Triggered on
Ctrl-Space and automatically as you type (completeSingle:false — always a
menu, never an auto-guess). Themed dropdown for dark mode.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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