feat: Page Editor v1.0 - canonical schema, SSR parity, and migration

Major improvements to WooNooW Page Editor system:

Schema & Architecture:
- Canonical section schema with unified sectionSchema.ts
- Normalized feature-grid to use items (not features)
- Standardized default values across all section types
- Schema versioning with automatic migration on read

Backend (PHP):
- Enhanced PlaceholderRenderer with typed output contracts
- Added fallback behavior for empty/invalid dynamic sources
- Added caching support for post data resolution
- New SchemaMigration class for backward compatibility
- New Features class for feature flags
- Enhanced PageSSR with full style support
- Removed controller-level special-casing for related_posts

Frontend (Admin SPA):
- Updated CanvasRenderer with schema-aware transformation
- Enhanced InspectorPanel with canonical schema metadata
- Added new section renderers

Frontend (Customer SPA):
- New section components: BentoCategoryGrid, MarqueeBanner, ProductCarousel, ShoppableImage
- Updated FeatureGridSection for items prop contract

Testing:
- Add PHP tests: SchemaMigrationTest, PlaceholderRendererTest, PageSSRTest
- Add TypeScript tests: schema-integration, feature-grid-regression
- Add parity tests for React vs SSR content matching
- Add CI script: check-schema-drift.mjs
- Add VERIFICATION_CHECKLIST.md

Documentation:
- RELEASE_NOTES-v1.0.md with full release notes
- docs/PAGE_EDITOR_SECTION_SCHEMA_V1.md
- docs/PAGE_EDITOR_SSR_COVERAGE_AUDIT.md

customer-spa/package-lock.json

@@ -27,6 +27,7 @@
                 "class-variance-authority": "^0.7.1",
                 "clsx": "^2.1.1",
                 "cmdk": "^1.1.1",
+                "framer-motion": "^12.38.0",
                 "lucide-react": "^0.547.0",
                 "react": "^18.3.1",
                 "react-dom": "^18.3.1",
@@ -4579,6 +4580,33 @@
                 "url": "https://github.com/sponsors/rawify"
             }
         },
+        "node_modules/framer-motion": {
+            "version": "12.38.0",
+            "resolved": "https://registry.npmjs.org/framer-motion/-/framer-motion-12.38.0.tgz",
+            "integrity": "sha512-rFYkY/pigbcswl1XQSb7q424kSTQ8q6eAC+YUsSKooHQYuLdzdHjrt6uxUC+PRAO++q5IS7+TamgIw1AphxR+g==",
+            "license": "MIT",
+            "dependencies": {
+                "motion-dom": "^12.38.0",
+                "motion-utils": "^12.36.0",
+                "tslib": "^2.4.0"
+            },
+            "peerDependencies": {
+                "@emotion/is-prop-valid": "*",
+                "react": "^18.0.0 || ^19.0.0",
+                "react-dom": "^18.0.0 || ^19.0.0"
+            },
+            "peerDependenciesMeta": {
+                "@emotion/is-prop-valid": {
+                    "optional": true
+                },
+                "react": {
+                    "optional": true
+                },
+                "react-dom": {
+                    "optional": true
+                }
+            }
+        },
         "node_modules/fsevents": {
             "version": "2.3.3",
             "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
@@ -5619,6 +5647,21 @@
                 "url": "https://github.com/sponsors/isaacs"
             }
         },
+        "node_modules/motion-dom": {
+            "version": "12.38.0",
+            "resolved": "https://registry.npmjs.org/motion-dom/-/motion-dom-12.38.0.tgz",
+            "integrity": "sha512-pdkHLD8QYRp8VfiNLb8xIBJis1byQ9gPT3Jnh2jqfFtAsWUA3dEepDlsWe/xMpO8McV+VdpKVcp+E+TGJEtOoA==",
+            "license": "MIT",
+            "dependencies": {
+                "motion-utils": "^12.36.0"
+            }
+        },
+        "node_modules/motion-utils": {
+            "version": "12.36.0",
+            "resolved": "https://registry.npmjs.org/motion-utils/-/motion-utils-12.36.0.tgz",
+            "integrity": "sha512-eHWisygbiwVvf6PZ1vhaHCLamvkSbPIeAYxWUuL3a2PD/TROgE7FvfHWTIH4vMl798QLfMw15nRqIaRDXTlYRg==",
+            "license": "MIT"
+        },
         "node_modules/ms": {
             "version": "2.1.3",
             "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",