Text in a family that isn't installed was drawn in a fallback font
without a word. Now:
- `text.missingFonts` lists the families a document names that no
installed or built-in font provides: text layers and their styled
ranges, text styles, and string variables bound to a font family
(every mode, through aliases), with the number of text layers.
- The desktop app shows a Missing fonts window after the user opens a
file that has any: once installed fonts are indexed (before that every
one of them would count as missing) and after any import report is
closed. Files named on the command line count. Programmatic opens and
the browser build never open it by themselves. Text > Missing fonts...
shows it for the file in front; Escape closes it.
- `figcraft-cli info` prints `missing font` lines (`missingFonts` with
--json).
- file-format-parity: the row claimed REST import warnings that no code
produced.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Headless runs (`figcraft-cli export`, `render`, `convert`, `run`, and the headless MCP server) never indexed the installed fonts, so a text layer in an installed family (Segoe UI, Inter installed per user, ...) was measured and drawn with a fallback face, while the desktop app used the real one. Auto layout sizes from MCP agents therefore differed from what users see in the app.
- `figcraft_text::scan_system_fonts_on_demand()`: the font database indexes the system fonts the first time it is used (first text layout, font lookup or font listing). `figcraft-cli` turns it on at startup for every subcommand, so a run that touches no text never pays for the scan. The desktop app keeps its background scan.
- `scan_system_fonts()` now runs once per process (a `OnceLock`): racing callers wait for the one directory walk instead of each walking the folders.
- Opt-out for reproducible renders: `--no-system-fonts` on any subcommand, or `FIGCRAFT_NO_SYSTEM_FONTS=1` (honoured by the desktop app too). Text then uses only the built-in fonts, as before.
- The scan is cheaper: it reads each file's headers, table directories and `name` tables instead of whole files (about 460 MB on this Windows machine), and takes file metadata from the directory listing instead of a lookup per file. This also speeds up the desktop app's background scan.
- Browser/wasm build unchanged (the scan is a no-op there).
- Docs: `docs/cli.md` (new Fonts section) and `docs/mcp.md` (Fonts under the backends table); CLI usage text mentions the flag.
