fix(gate): close the gaps in the plan-code guard, the button lists and the tooling

- planCodes: the quote and slash lookarounds let the commonest form through (a docstring or test
  title opening with a code, a slash pair); the two real exceptions (an episode titled "E1", ruff's
  E4/E7/E9) are now named and cut first, with cases that fail on the old pattern. audit_metrics
  counts by the same definition.
- button-primitive: both file lists live in the rule body, out of sight of the snapshot and the
  register; each is now pinned to its exact set of ui/ files (red when either is widened).
- check.sh --brief shows a short log whole and keeps the line before each hit, so ruff's rule and
  eslint's file path survive the excerpt.
- lint-changed runs prettier over every changed frontend file, as the gate does, not only code.
- CLAUDE.md and gates.md no longer claim the basedpyright baseline was found harmless: it was never
  triaged, and the reportOptional* entries are the likeliest real bugs.

scripts/lint-changed.sh

@@ -1,7 +1,8 @@
 #!/usr/bin/env bash
-# The fast lint lanes on the uncommitted files only — ruff (check + format) on Python, eslint +
-# prettier on the frontend — for a check after every edit instead of a full gate run. It is a
-# convenience, never the gate: scripts/check.sh stays what a merge or a release requires.
+# The fast lint lanes on the uncommitted files only — ruff (check + format) on Python, eslint on the
+# frontend's code and prettier on all of the frontend — for a check after every edit instead of a
+# full gate run. It is a convenience, never the gate: scripts/check.sh stays what a merge or a
+# release requires.
 #
 #   bash scripts/lint-changed.sh          lint what `git status` shows as changed or new
 #   bash scripts/lint-changed.sh --hook   the same, as a Claude Code Stop hook: silent and exit 0 when
@@ -23,12 +24,19 @@ fi
 
 mapfile -t changed < <(git status --porcelain --untracked-files=all | sed -E 's/^.. //; s/.* -> //' |
   while read -r f; do [ -f "$f" ] && printf '%s\n' "$f"; done)
-py=() fe=()
+# eslint reads code; prettier reads every file the gate's `prettier --check .` does (a locale JSON,
+# a stylesheet), and `--ignore-unknown` passes over the ones it has no parser for.
+py=() fe=() pretty=()
 for f in "${changed[@]}"; do
   case "$f" in
     backend/*.py | scripts/*.py) py+=("$f") ;;
+  esac
+  case "$f" in
     frontend/*.ts | frontend/*.tsx | frontend/*.js | frontend/*.mjs) fe+=("${f#frontend/}") ;;
   esac
+  case "$f" in
+    frontend/*) pretty+=("${f#frontend/}") ;;
+  esac
 done
 
 report="$(
@@ -38,12 +46,14 @@ report="$(
   fi
   if [ ${#fe[@]} -gt 0 ]; then
     (cd frontend && npx eslint --max-warnings 0 "${fe[@]}" 2>&1)
-    (cd frontend && npx prettier --check --log-level warn "${fe[@]}" 2>&1)
+  fi
+  if [ ${#pretty[@]} -gt 0 ]; then
+    (cd frontend && npx prettier --check --ignore-unknown --log-level warn "${pretty[@]}" 2>&1)
   fi
 )"
 
 if [ -z "$report" ]; then
-  [ "$hook" = 1 ] || echo "lint-changed: clean (${#py[@]} py, ${#fe[@]} frontend)"
+  [ "$hook" = 1 ] || echo "lint-changed: clean (${#py[@]} py, ${#pretty[@]} frontend)"
   exit 0
 fi
 if [ "$hook" = 1 ]; then