docs: fix round-3 review findings — §/used-to/v1 residuals, zh stamp example, budget freeze honored

Delete the three §-citation residuals (web-app cordis.patch.yml, two
client design.md §-headers); recast the two CSS used-to narrations and
hmr's four v1 labels as current-state prose; narrow the zh exemption
example to 'this cut' (「本版本」 legitimately renders 'This version');
extend the candidate gate list with the post-battery shapes (§\d with a
committed-owner carve-out, 'used to', bare v1) on both sides and
re-record; honor the over-target ceiling freeze — docs/AGENTS.md
condensed to 1320 and the ceiling restored to 1320.

.agents/notes/implemented/process/2026-08-09-committed-artifact-citations.md

@@ -23,7 +23,7 @@ One repo-wide purge applied these rules across the prose surfaces, including the
 ## Alternatives considered
 
 - **Commit the design ledgers and audit documents so the ordinals resolve.** Rejected: session transcripts are working artifacts, not maintained references; committing them would create a parallel, ungated decision corpus beside Agent Notes, and their internal numbering would still drift.
-- **A mechanical gate for the banned vocabulary.** Deferred: the vocabulary is unbounded natural language, and the audit's recall batteries need judgment to separate leakage from legitimate prose ("wait" the noun, contrastive "actually", runtime old/new states). A narrow high-precision gate (for example `\(decision \d`, `\(audit [A-Z]\d`, `\bcut \d`, `this cut`, a bare `\bT\d\b`, and `P-I`) is the candidate if the pattern recurs; review of the purge itself caught residuals in exactly those last four shapes, so they lead the candidate list.
+- **A mechanical gate for the banned vocabulary.** Deferred: the vocabulary is unbounded natural language, and the audit's recall batteries need judgment to separate leakage from legitimate prose ("wait" the noun, contrastive "actually", runtime old/new states). A narrow high-precision gate (for example `\(decision \d`, `\(audit [A-Z]\d`, `\bcut \d`, `this cut`, a bare `\bT\d\b`, `P-I`, `used to `, a bare `\bv1\b`, and `§\d` — the last excluding citations whose section numbering has a committed owner, such as web-styling.md's own §N) is the candidate if the pattern recurs; review of the purge itself caught residuals in exactly these post-battery shapes, so they lead the candidate list.
 - **Delete the rationale that cited dead artifacts.** Rejected: the factual clauses were preserved or restated; only citations, review choreography, and derivation transcripts were removed, per the prose standard's complete-proposition rule.
 
 ## Verification