Quota and usage admin sentences live in one module, read by the web pages and the terminal #5621

For: Setting a quota or reading usage reads the same wherever it is said, on the web and in the terminal, because it is said from one place. Today each sentence below is typed out separately in src/web/pages/admin-limits.ts, src/tui/screens/quotas.ts, src/web/pages/usage.ts, src/tui/screens/usage.ts.

Done:

• [ ] src/actions/admin_limits_words.ts exports these sentences (new, or the module that already owns that concept; say which in the pull):

- "A quota is a positive whole number, or empty for no limit." - "Usage is read by a forge admin."

• [ ] Every file named imports them, and grep -rn for each sentence under src/ finds only the module.
• [ ] Pages, screens and answers are byte-for-byte unchanged: every existing test passes as it is.
• [ ] A new test/admin-limits-words.test.ts asserts each file named no longer contains the literal (read as text), and fails if a copy is typed back.
• [ ] Before pushing, run test/admin-limits-words.test.ts, the tests of the files you touched, bun x tsc --noEmit and, if src/web changed, bun scripts/design-lint.ts. A red test elsewhere that main also has is named in the pull, not a reason to stop.

Files: src/actions/admin_limits_words.ts, src/web/pages/admin-limits.ts, src/tui/screens/quotas.ts, src/web/pages/usage.ts, src/tui/screens/usage.ts, test/admin-limits-words.test.ts. Risk: a pure move; change no wording, and touch only the lines the sentences are on.

Parked by the crew: the check failed ("GET /settings/tokens names its phases and answers within its budget") and the decider saw no point in another try (pull #5636 closed). Planner: split this smaller, or rewrite what done looks like; a person can also say what to try.