v0.3.1 — never invent frontend copy

Never invent frontend copy. If the text is already defined, write it; if
not, write lorem ipsum. Never text the assistant made up.

Added

• Conventions §9, frontend copy — text defined in the mockup, the spec, the
  PRD/SRS, an existing copy constant or by you is written verbatim, without
  asking again. Text nothing defines is lorem ipsum sized to its expected
  length — never TBD, never a guessed sentence.
• Placeholders live in the feature's copy constant (one grep finds them all)
  and are recorded as rows. Tests find elements by role or test id, never by
  placeholder text.
• Data is not copy: prices, names and dates stay realistic, never lorem.

Changed

• S5 gains the rule and an exit criterion; /pspt:build applies it;
  /pspt:ticket asks only for undefined text and records placeholders in
  plan.md §5a.

---

Full history: CHANGELOG.md