feat: add more roles (tech_lead, scrum_master, product_owner, designer, qa)

- Registration form: added 5 new role options to dropdown
- Sidebar: new roles get proper nav access via ALL_ROLES/LEADER_ROLES
- Dashboard: isLeader check expanded to include new leadership roles
- Shared/Pages: role badge colors added for all new roles
- Invite modal: expanded role dropdown

server/package.json

@@ -4,12 +4,17 @@
     "private": true,
     "type": "module",
     "scripts": {
-        "start": "node index.js"
+        "start": "node index.js",
+        "test": "vitest"
     },
     "dependencies": {
-        "express": "^5.1.0",
-        "mysql2": "^3.14.1",
+        "bcryptjs": "^3.0.2",
         "cors": "^2.8.5",
-        "bcryptjs": "^3.0.2"
+        "express": "^5.1.0",
+        "mysql2": "^3.14.1"
+    },
+    "devDependencies": {
+        "supertest": "^7.2.2",
+        "vitest": "^4.0.18"
     }
 }