upgrade: adopt V8.12.0-dev.1 (V8.11 unified professional UI + V8.12 workflow usability)

- Overlay 26 changed files from SiteForge_Enterprise_V8_12 (UI layer only:
  professional-ui.js/css, workspace/factory-v2/operations/editor templates,
  +2 test files, compose/ci/scripts/docs)
- Re-apply v8_workflows type-mapping fix (类型/分类) lost in upgrade
- Pin compose project name to siteforge-v8-10 so existing data volumes
  (hesupipe site 483295c29ea0, 193 entries) keep attached
- Drop stray .s10_* state files; ignore .s10_*/.sf_*/.s87_* patterns
- Plan/spec revisions per plan-review round 1 (icons are new design,
  real test assertions, recorded deviations)

Tests: 226 passed / 1 env-only failure (test needs node binary in PATH,
absent in python:3.12-slim container; host node v24 --check all 9 JS OK)

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

app/templates/editor.html

@@ -1,5 +1,5 @@
-<!doctype html><html lang="zh-CN"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>SiteForge Studio · 可视化建站</title><link rel="stylesheet" href="/ui/editor.css"><script defer src="/ui/editor.js"></script></head>
-<body>
+<!doctype html><html lang="zh-CN"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>SiteForge Studio · 可视化建站</title><link rel="stylesheet" href="/ui/editor.css"><script defer src="/ui/editor.js"></script><link rel="stylesheet" href="/ui/professional-ui.css"><script defer src="/ui/professional-ui.js"></script></head>
+<body data-sf-page="editor">
 <div class="studio">
   <header class="studio-top">
     <div class="brand"><a href="/" title="返回网站管理">◈</a><div><b>SiteForge</b><small>VISUAL STUDIO</small></div></div>