Add isActive field to challenge chains and update localization; implement functionality to toggle chain status in the UI, enhancing task management and user experience.

src/types/challenge.ts

@@ -27,6 +27,7 @@ export interface ChallengeChain {
   id: string
   name: string
   tasks: ChallengeTask[] // Populated
+  isActive: boolean
   createdAt: string
   updatedAt: string
 }
@@ -132,11 +133,13 @@ export interface UpdateTaskRequest {
 export interface CreateChainRequest {
   name: string
   taskIds: string[] // Array of task IDs
+  isActive?: boolean
 }
 
 export interface UpdateChainRequest {
   name?: string
   taskIds?: string[]
+  isActive?: boolean
 }
 
 // ========== Stats v2 Types ==========