chore(reset)!: strip storefront → network-service seed (v0.9.0)

Pivot ecomm from a generic multi-tenant Shopify-alternative storefront to the
commitment-commerce + cross-maker verified referral NETWORK direction
(ecomm-content/rfcs/network_strategy.md; OHM identity/relationality super-drafts).

Phase A of the reset — clear the decks:
- Strip the storefront surfaces with no carry-forward: the storefronts domain,
  the products import/export/image HTTP spine (service/imagefetch/repo + endpoints),
  the SPA frontend, and the Playwright e2e suite.
- Keep the reusable core: /healthz + /api/auth/* (accounts); the
  catalog-normalization library (codec/dialect/models/serialize/validate/diff/hosted —
  importable, no HTTP yet); platform/* infra. Migrations untouched (append-only).
- Reduce check.sh to backend-only (import-linter + pytest); trim dev.sh and the unused
  GCS overlay env. Repoint app.json/README/CLAUDE.md; bump VERSION 0.8.0 -> 0.9.0.

check.sh green: import-linter (main > domains > platform) KEPT, pytest passing.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

scripts/check.sh

@@ -2,7 +2,8 @@
 # The single pre-merge gate for wiggleverse-ecomm (SD-0001 §6.8). Runs, in order:
 #   1. the import-linter layering contract  (main > domains > platform)
 #   2. the backend test suite                (pytest, against Postgres)
-#   3. the frontend typecheck + production build
+# The network-seed reset stripped the SPA frontend, so the frontend typecheck/build
+# and vitest steps are gone — this is a backend-only gate now.
 # CI (.gitea/workflows/ci.yml) calls this exact script, so local and server gates
 # cannot drift. Exits non-zero on the first failure.
 #
@@ -31,10 +32,4 @@ echo "==> import boundaries (lint-imports)"
 echo "==> backend tests (pytest)"
 ( cd "$repo_root/backend" && "$PY" -m pytest -q )
 
-echo "==> frontend typecheck + build"
-( cd "$repo_root/frontend" && npm run build )
-
-echo "==> frontend unit tests (vitest)"
-( cd "$repo_root/frontend" && npm test )
-
 echo "==> all gates green"