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/audit_metrics.py

@@ -28,9 +28,11 @@ BE_COMPLEXITY = 10  # ruff's C901 default
 FE_COMPLEXITY = 20  # the frontend's line
 
 # what planCodes.contract.test.ts holds the code to: an epic (`E28`, `E9.5`) or a roadmap item (`R14`),
-# not `E2E`, not a ruff rule family (`E4/E7/E9`), not a TV episode (`S2 · E5`, an episode titled "E1")
-EPIC_CODE = re.compile(r'(?<![/"])\b(E\d{1,2}(\.\d+)?|R\d{1,2})\b(?![/"E])')
+# not `E2E`, not a TV episode (`S2 · E5`); NOT_CODES are its named exceptions, cut first (an episode
+# titled "E1", ruff's default `E4/E7/E9`)
+EPIC_CODE = re.compile(r"\b(E\d{1,2}(\.\d+)?|R\d{1,2})\b(?!E)")
 EPISODE = re.compile(r"S\d{1,2}\s?·?\s?E\d+")
+NOT_CODES = re.compile(r'"E\d{1,2}"|\bE4/E7/E9\b')
 NARRATION = re.compile(r"\b(used to|no longer)\b", re.IGNORECASE)
 
 
@@ -114,7 +116,12 @@ def _complexity() -> dict[str, object]:
 
 def _noise(be: list[tuple[Path, list[str]]], fe: list[tuple[Path, list[str]]]) -> dict[str, object]:
     every = be + fe
-    epic = [(p, ln) for p, ls in every for ln in ls if EPIC_CODE.search(EPISODE.sub("", ln))]
+    epic = [
+        (p, ln)
+        for p, ls in every
+        for ln in ls
+        if EPIC_CODE.search(NOT_CODES.sub("", EPISODE.sub("", ln)))
+    ]
     be_c = sum(_comment_lines(ls, True) for _, ls in be)
     fe_c = sum(_comment_lines(ls, False) for _, ls in fe)
     return {