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

src/data.ts

@@ -9,10 +9,12 @@ export interface User {
 export interface Subtask { id: string; title: string; done: boolean }
 export interface Comment { id: string; userId: string; text: string; timestamp: string }
 export interface Activity { id: string; text: string; timestamp: string }
+export interface Dependency { id: string; dependsOnUserId: string; description: string; resolved: boolean }
 export interface Task {
   id: string; title: string; description: string; status: Status; priority: Priority;
   assignee: string; reporter: string; dueDate: string; tags: string[];
   subtasks: Subtask[]; comments: Comment[]; activity: Activity[];
+  dependencies: Dependency[];
 }
 
 export const PRIORITY_COLORS: Record<Priority, { color: string; bg: string }> = {