upgrade: adopt V8.31.1 (theme 1.3/1.4 redesigns, editor deep-canvas, guided launch, component library)

Overlay 190 upstream items (V8.22→8.31) preserving trade-pro theme,
registry tests, and design docs. Re-applied full patch set on identical
anchors (discovery/env_for/blocks.css/type-mapping/locale-override/
theme_color/frontend entries/test_theme_pro_v3 mods) plus compose pins.

Verified: theme suites 35/35; dual-baseline full run 415 passed vs
pristine 386+29 ours, FAILED-set diff EMPTY (same 10 Windows env fails).
Live: container 8.31.1-dev.1 healthy, hesupipe 192 entries intact,
trade-pro build 203 pages 0 errors.

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

reports/v829/summary.json

@@ -0,0 +1,54 @@
+{
+  "version": "8.29.0-dev.1",
+  "completed_utc": "2026-10-23T09:13:21.447809+00:00",
+  "python": {
+    "batches": 25,
+    "passed_cases": 387,
+    "all_batches_passed": true,
+    "cases_each_batch": [
+      20,
+      23,
+      19,
+      6,
+      16,
+      24,
+      20,
+      8,
+      19,
+      14,
+      15,
+      11,
+      14,
+      36,
+      15,
+      11,
+      8,
+      16,
+      7,
+      5,
+      19,
+      10,
+      21,
+      20,
+      10
+    ]
+  },
+  "node": {
+    "passed": 39
+  },
+  "http_worker": "passed (local isolated)",
+  "browser": {
+    "route_mocked_actual_assets": "passed",
+    "widths": [
+      "1440",
+      "390"
+    ],
+    "scripts_errors": 0,
+    "real_localhost_login": "not verified (blocked by execution policy)"
+  },
+  "production": {
+    "art_design_pro_official_build": "not verified",
+    "postgres_redis_multiworker": "not verified",
+    "remote_publish_and_rollback": "not verified"
+  }
+}