chore: configure local quality gates per ADR-0007

Wire Husky 9 + lint-staged + commitlint with @commitlint/config-
conventional - the local pair of git hooks defined in ADR-0007.

- package.json declares the prepare script ('husky') so the hooks
  install on every fresh pnpm install (no manual step).
- .husky/pre-commit runs 'pnpm exec lint-staged' which formats staged
  files via prettier (lint and tests stay in CI per ADR-0015 to keep
  commits fast).
- .husky/commit-msg runs 'pnpm exec commitlint --edit "$1"' to enforce
  Conventional Commits at commit time. Same check is repeated in CI
  for defense in depth.
- commitlint.config.cjs at the workspace root extends @commitlint
  /config-conventional.
- lint-staged config in package.json restricts to ts/tsx/js/jsx/html/
  scss/css/md/json/yml/yaml under prettier --write.

Verified: a 'feat: ...' commit message is accepted; a message without
a Conventional Commits type is rejected.

.husky/commit-msg

@@ -0,0 +1 @@
+pnpm exec commitlint --edit "$1"

.husky/pre-commit

@@ -0,0 +1 @@
+pnpm exec lint-staged

commitlint.config.cjs

@@ -0,0 +1,7 @@
+/**
+ * Commitlint configuration — Conventional Commits.
+ * See ADR-0007 for rationale.
+ */
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+};

package.json

@@ -2,8 +2,15 @@
   "name": "apf-portal",
   "version": "0.0.0",
   "license": "MIT",
-  "scripts": {},
+  "scripts": {
+    "prepare": "husky"
+  },
   "private": true,
+  "lint-staged": {
+    "*.{ts,tsx,js,jsx,html,scss,css,md,json,yml,yaml}": [
+      "prettier --write"
+    ]
+  },
   "devDependencies": {
     "@analogjs/vite-plugin-angular": "~2.1.2",
     "@analogjs/vitest-angular": "~2.1.2",
@@ -13,6 +20,8 @@
     "@angular/cli": "~21.2.0",
     "@angular/compiler-cli": "~21.2.0",
     "@angular/language-service": "~21.2.0",
+    "@commitlint/cli": "^20.5.3",
+    "@commitlint/config-conventional": "^20.5.3",
     "@eslint/js": "^9.8.0",
     "@nestjs/schematics": "^11.0.0",
     "@nestjs/testing": "^11.0.0",
@@ -44,11 +53,13 @@
     "eslint": "^9.8.0",
     "eslint-config-prettier": "^10.0.0",
     "eslint-plugin-playwright": "^1.6.2",
+    "husky": "^9.1.7",
     "jest": "^30.0.2",
     "jest-environment-node": "^30.0.2",
     "jest-util": "^30.0.2",
     "jsdom": "^27.1.0",
     "jsonc-eslint-parser": "^2.1.0",
+    "lint-staged": "^16.4.0",
     "nx": "22.7.0",
     "prettier": "^3.8.1",
     "prisma": "^7.8.0",