WEB-1019: Add Playwright create-client form-validation spec (PR-3)

- playwright/tests/clients/create-client-form-validation.spec.ts (new)
  Pure form-behaviour coverage for the create-client workflow:
  1. Empty office       → Preview step absent (areFormvalids() false)
  2. Empty firstname    → ng-invalid + mat-form-field-invalid + mat-error
  3. Empty lastname     → same as above
  4. activationDate < submittedOnDate → matDatepickerMin fires;
     ng-invalid + mat-form-field-invalid; Preview absent
  5. legalForm PERSON↔ENTITY → name-control subtree swapped;
     constitutionId visible in ENTITY, absent in PERSON
  Tests use inline credential injection + page.route() mocks for
  /clients/template and /fieldconfiguration/ADDRESS so they run
  without a live Fineract backend (setup project still needs one).
  All 5 tests pass (6 including setup) in ~1 min on Chromium.

- proxy.localhost.conf.js
  Fix target: http→https; remove pathRewrite so Fineract receives
  the full /fineract-provider/... path that it expects.

- package.json
  Add start:local script (serves with proxy.localhost.conf.js)
  so the Angular dev-server and the Fineract fixture both target
  the same local backend at https://localhost:8443.

- playwright.config.ts
  webServer.command: npm run start → npm run start:local so
  Playwright's auto-launched dev-server uses the local proxy.

Assertions use ng-invalid / mat-form-field-invalid CSS classes
(Angular Material MDC does not set aria-invalid as an attribute).
mat-checkbox toggle targets the inner input[type=checkbox] directly
to avoid labelPosition=before click-miss issues.

Author: devvaansh

package.json

@@ -16,6 +16,7 @@
     "build": "node version.js && npm run env -s && ng build --configuration production --output-hashing=none",
     "build:prod": "node version.js && node --max-old-space-size=16384 ./node_modules/@angular/cli/bin/ng build --configuration production --output-hashing=none --base-href=/web-app/",
     "start": "npm run env -s && ng serve --proxy-config proxy.conf.js",
+    "start:local": "npm run env -s && ng serve --proxy-config proxy.localhost.conf.js",
     "serve:dev": "npm run env -s && ng serve --source-map",
     "serve:sw": "npm run build -s && npx http-server ./dist -p 4200",
     "lint": "eslint . && stylelint \"src/**/*.scss\" && prettier . --check && htmlhint \"src\" --config .htmlhintrc",

playwright.config.ts

@@ -223,7 +223,7 @@ export default defineConfig({
   webServer: process.env.CI
     ? undefined
     : {
-        command: 'npm run start',
+        command: 'npm run start:local',
         url: 'http://localhost:4200',
         reuseExistingServer: true,
         timeout: 180000