chore(forms): remove unused vee-validate; formalize ref+validators+Zod as canonical pattern

Strict-regex sweep of apps/app/src/ confirms zero VeeValidate usage:
no `from 'vee-validate'` imports, no <Field|Form|ErrorMessage>,
no defineRule(), no useForm(). The 15 prior fuzzy matches were
false positives where /useForm/ matched useFormDraft/useFormSteps/
useFormSchemas/useFormFailures.

Changes:
- Remove `vee-validate` and `@vee-validate/zod` from apps/app/package.json
- Regenerate pnpm-lock.yaml (no other deps shifted)
- CLAUDE.md "Forms": replace VeeValidate prescription with the actual
  ref + @core/utils/validators + Zod-payload-schema pattern that the
  codebase already uses everywhere
- VUEXY_COMPONENTS.md: correct the stale "Registration uses VeeValidate"
  claim (the page actually uses useFormDraft + validators); update the
  "Form validation" reference row
- BACKLOG.md: close VEE-001 with the audit trail

All 319 existing tests still pass; vue-tsc clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/app/package.json

@@ -30,7 +30,6 @@
     "@tiptap/pm": "^2.27.1",
     "@tiptap/starter-kit": "^2.27.1",
     "@tiptap/vue-3": "^2.27.1",
-    "@vee-validate/zod": "^4.15.1",
     "@vueuse/core": "10.11.1",
     "@vueuse/math": "10.11.1",
     "apexcharts": "3.54.1",
@@ -50,7 +49,6 @@
     "shepherd.js": "13.0.3",
     "ufo": "1.6.1",
     "unplugin-vue-define-options": "1.5.5",
-    "vee-validate": "^4.15.1",
     "vue": "3.5.22",
     "vue-chartjs": "5.3.2",
     "vue-flatpickr-component": "11.0.5",

apps/app/pnpm-lock.yaml

@@ -51,9 +51,6 @@ importers:
       '@tiptap/vue-3':
         specifier: ^2.27.1
         version: 2.27.1(@tiptap/core@2.27.1(@tiptap/pm@2.27.1))(@tiptap/pm@2.27.1)(vue@3.5.22(typescript@5.9.3))
-      '@vee-validate/zod':
-        specifier: ^4.15.1
-        version: 4.15.1(vue@3.5.22(typescript@5.9.3))(zod@3.25.76)
       '@vueuse/core':
         specifier: 10.11.1
         version: 10.11.1(vue@3.5.22(typescript@5.9.3))
@@ -111,9 +108,6 @@ importers:
       unplugin-vue-define-options:
         specifier: 1.5.5
         version: 1.5.5(vue@3.5.22(typescript@5.9.3))
-      vee-validate:
-        specifier: ^4.15.1
-        version: 4.15.1(vue@3.5.22(typescript@5.9.3))
       vue:
         specifier: 3.5.22
         version: 3.5.22(typescript@5.9.3)
@@ -1931,11 +1925,6 @@ packages:
     cpu: [x64]
     os: [win32]
 
-  '@vee-validate/zod@4.15.1':
-    resolution: {integrity: sha512-329Z4TDBE5Vx0FdbA8S4eR9iGCFFUNGbxjpQ20ff5b5wGueScjocUIx9JHPa79LTG06RnlUR4XogQsjN4tecKA==}
-    peerDependencies:
-      zod: ^3.24.0
-
   '@vitejs/plugin-vue-jsx@5.1.1':
     resolution: {integrity: sha512-uQkfxzlF8SGHJJVH966lFTdjM/lGcwJGzwAHpVqAPDD/QcsqoUGa+q31ox1BrUfi+FLP2ChVp7uLXE3DkHyDdQ==}
     engines: {node: ^20.19.0 || >=22.12.0}
@@ -5001,11 +4990,6 @@ packages:
   validate-npm-package-license@3.0.4:
     resolution: {integrity: sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==}
 
-  vee-validate@4.15.1:
-    resolution: {integrity: sha512-DkFsiTwEKau8VIxyZBGdO6tOudD+QoUBPuHj3e6QFqmbfCRj1ArmYWue9lEp6jLSWBIw4XPlDLjFIZNLdRAMSg==}
-    peerDependencies:
-      vue: ^3.4.26
-
   vfile-message@4.0.3:
     resolution: {integrity: sha512-QTHzsGd1EhbZs4AsQ20JX1rC3cOlt/IWJruk893DfLRr57lcnOeMaWG4K0JrRta4mIJZKth2Au3mM3u03/JWKw==}
 
@@ -7013,14 +6997,6 @@ snapshots:
   '@unrs/resolver-binding-win32-x64-msvc@1.11.1':
     optional: true
 
-  '@vee-validate/zod@4.15.1(vue@3.5.22(typescript@5.9.3))(zod@3.25.76)':
-    dependencies:
-      type-fest: 4.41.0
-      vee-validate: 4.15.1(vue@3.5.22(typescript@5.9.3))
-      zod: 3.25.76
-    transitivePeerDependencies:
-      - vue
-
   '@vitejs/plugin-vue-jsx@5.1.1(vite@7.1.12(@types/node@24.9.2)(sass@1.76.0)(tsx@4.20.6)(yaml@2.8.1))(vue@3.5.22(typescript@5.9.3))':
     dependencies:
       '@babel/core': 7.28.5
@@ -10722,12 +10698,6 @@ snapshots:
       spdx-correct: 3.2.0
       spdx-expression-parse: 3.0.1
 
-  vee-validate@4.15.1(vue@3.5.22(typescript@5.9.3)):
-    dependencies:
-      '@vue/devtools-api': 7.7.7
-      type-fest: 4.41.0
-      vue: 3.5.22(typescript@5.9.3)
-
   vfile-message@4.0.3:
     dependencies:
       '@types/unist': 3.0.3