T9.9 - C4 + the backlog sweep: nine entries closed, each re-measured first

The colour half (C4, approved Aug 18 - "change them"):
- BL-004: the help centre's own 52-colour palette collapsed onto theme tokens
- BL-005: the JS-built dialogs (auth-guard, wp-format) and project-data's
  badges read tokens; the creator's categorical badge palette moved to
  theme-light as --wp-chart-1..10, read by computed style at boot; the print
  popup - a document with no stylesheet - inlines live token VALUES
- BL-008: the second brand blue (#2563d6) is deleted; .sop-inherited tints
  with THE blue at the same 7% alpha
- BL-009: the ninth amber (--wp-status-warning-text-alt) is deleted
- theme-light gained the two missing feedback tokens the consoles carried as
  literals (--wp-status-success-text / -error-text)
- NEW tests/color_check.py 4/4: zero hex literals outside theme-light.css,
  comments stripped (the BL-017 lesson), with the exceptions named in full
  (meta theme-color cannot resolve a var; rgba alphas are opacity recipes)

The correctness half, each re-measured before touching, as the task ordered:
- BL-011 STILL REPRODUCED: the sync badge mounted on the first async sync
  event; its holder now mounts at DOMContentLoaded, so the three overlays land
  in script order deterministically
- BL-012 fixed and MEASURED: baseline_shots freezes Date and Math.random per
  document; two consecutive admin captures came back byte-identical
- BL-016 fixed: a step-less wizard URL is step 1; stepper_check's deliberately
  wrong pin flipped with the fix, exactly as the entry planned
- BL-018 fixed both halves: the false-complete write now requires the
  {sop,state} production shape, and browser_check.seed writes that shape -
  which un-detoured four probes' creators from the SOP gate. stepper_check
  re-pointed at projB (no SOP) because its premise is a wizard someone is
  STARTING, and projA now legitimately restores a finished one.
- BL-019 fixed: a stored cost code that left COST_CODES is kept as an option
  (the gov_wosize pattern), so opening a package no longer blanks its record
- hold_check's AST sweep refined in passing detection: it flagged T8.3's
  notification-row .status as a release transition; it now reads wp.status only

Every wave-9-pointing backlog entry is closed with its measurement recorded.

Verification (each probe run alone): color_check 4/4, stepper_check 71/71,
validation_check 77/77, url_state_check 23/23, autosave_check 34/34,
a11y_check 22/22, launcher_check 58/58, aggregates_check 16/16,
kitting_check 26/26, hold_check 50/50, mobile_check 24/24, frame_check 38/38,
sections_check 95/95, form_structure_check 50/51 (BL-022's question).

Items: C4, BL-004, BL-005, BL-008, BL-009, BL-011, BL-012, BL-016, BL-018, BL-019

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/baseline_shots.py

@@ -178,6 +178,24 @@ def main():
         print(f"\n  {len(pages)} page(s) x {len(widths)} width(s) -> {args.out}\n")
         browser = cdp.Browser()
         page = browser.page()
+        # BL-012 (fixed at T9.9): admin's captured height varied ~600px between
+        # runs and the creator at 1440px shifted, because live timestamps and
+        # relative times re-render per run. Freezing Date (and Math.random) in
+        # every new document makes a capture comparable with the last one.
+        page.ws.call("Page.addScriptToEvaluateOnNewDocument", {"source": (
+            "(function(){"
+            "var FIXED = 1755600000000;"                       # 2026-08-19T10:40Z
+            "var RealDate = Date;"
+            "function FrozenDate(){ return new RealDate(FIXED); }"
+            "FrozenDate.now = function(){ return FIXED; };"
+            "FrozenDate.parse = RealDate.parse; FrozenDate.UTC = RealDate.UTC;"
+            "FrozenDate.prototype = RealDate.prototype;"
+            "window.Date = FrozenDate;"
+            "var seed = 42;"
+            "Math.random = function(){ seed = (seed * 9301 + 49297) % 233280;"
+            " return seed / 233280; };"
+            "})();"
+        )})
         for name, filename, user, wait_for in pages:
             capture(page, base, tok, name, filename, user, wait_for,
                     widths, args.out, args.label)