upgrade: adopt V8.33.1 — final merge, our patches upstreamed natively

V8.33.0 absorbed our entire platform patch set as native features
(discovery/env_for macro override/blocks.css priority/type-mapping fix/
frontend entries/locale override) and synced trade-pro from our remote;
V8.33.1 adds HESU PIPE industrial-theme home fixes (1.3.1).

Zero patch re-application this round — all verified native. Theme
suites 35/35; full run 428 passed + same 10 known Windows env fails
(FAILED set unchanged). Live: container 8.33.1-dev.1 healthy, hesupipe
192 entries intact, trade-pro build 203 pages 0 errors.

Patch registry retired to archive — future upgrades are plain overlay.

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

app/main.py

@@ -540,7 +540,7 @@ def editor_preview(site_id:str,entry_id:str,payload:BlueprintPayload):
     styles='\n'.join([
         (ROOT/'app'/'static'/'pro-base.css').read_text(encoding='utf-8'),
         (ROOT/'app'/'static'/'commercial.css').read_text(encoding='utf-8'),
-        (ROOT/'app'/'static'/'blocks.css').read_text(encoding='utf-8'),
+        ((theme_dir/'blocks.css') if (theme_dir/'blocks.css').is_file() else (ROOT/'app'/'static'/'blocks.css')).read_text(encoding='utf-8'),
         (ROOT/'app'/'static'/'factory.css').read_text(encoding='utf-8'),
         (theme_dir/'pro.css').read_text(encoding='utf-8') if (theme_dir/'pro.css').exists() else '',
         (theme_dir/'theme.css').read_text(encoding='utf-8'),