Root cause: the per-character font probes were inline spans side by side, so Chrome shaped f + i into the fi ligature across them and the lone i probe reported no glyph of ours. Each probe is now its own block. The Google Fonts text= subsets keep the GSUB ligatures; regression test with a real Montserrat text= subset.
--help / -h prints the command's usage and exits 0 before any config, render or network; unknown flags exit 2 with the usage (cli/data/flags.json from tools/gen-flags.ts). Command tables moved to cli/commands.ts; ads apple reachable again; shots render --scenes rejects unknown ids at once.
