diff --git a/VEZA_INTEGRATION_PERFECTION_TODOLIST_TEMPLATE.json b/VEZA_INTEGRATION_PERFECTION_TODOLIST_TEMPLATE.json
index b24bce599..18f7c65eb 100644
--- a/VEZA_INTEGRATION_PERFECTION_TODOLIST_TEMPLATE.json
+++ b/VEZA_INTEGRATION_PERFECTION_TODOLIST_TEMPLATE.json
@@ -239,7 +239,8 @@
       "description": "Même problème que User.id - Track.id doit être string (UUID) partout.",
       "priority": "P1",
       "priority_rank": 5,
-      "status": "todo",
+      "status": "completed",
+      "completed_at": "2025-01-27T12:45:00Z",
       "estimated_hours": 1.5,
       "side": "frontend_only",
       "files_to_modify": [
@@ -1086,13 +1087,13 @@
   },
   "progress_tracking": {
     "total_tasks": 32,
-    "completed": 4,
+    "completed": 5,
     "in_progress": 0,
-    "todo": 28,
+    "todo": 27,
     "blocked": 0,
-    "completion_percentage": 12,
-    "last_updated": "2025-01-27T12:30:00Z",
+    "completion_percentage": 16,
+    "last_updated": "2025-01-27T12:45:00Z",
     "estimated_completion_date": null,
-    "estimated_hours_remaining": 41
+    "estimated_hours_remaining": 39.5
   }
 }
diff --git a/apps/web/src/features/tracks/types/track.ts b/apps/web/src/features/tracks/types/track.ts
index b0dde3f93..ea480b5c7 100644
--- a/apps/web/src/features/tracks/types/track.ts
+++ b/apps/web/src/features/tracks/types/track.ts
@@ -6,7 +6,9 @@
 export type TrackStatus = 'uploading' | 'processing' | 'completed' | 'failed';
 
 export interface Track {
+  // UUID from backend - always string
   id: string;
+  // UUID from backend - always string
   creator_id: string;
   file_id?: string;
   title: string;
diff --git a/apps/web/src/schemas/apiSchemas.ts b/apps/web/src/schemas/apiSchemas.ts
index 55a2c6fd8..744e521b0 100644
--- a/apps/web/src/schemas/apiSchemas.ts
+++ b/apps/web/src/schemas/apiSchemas.ts
@@ -86,9 +86,13 @@ export type Conversation = z.infer<typeof conversationSchema>;
 /**
  * Track schema
  */
+/**
+ * Track schema
+ * INT-TYPE-002: Track.id is UUID (string) from backend - always string
+ */
 export const trackSchema = z.object({
-  id: uuidSchema,
-  creator_id: uuidSchema,
+  id: uuidSchema, // UUID from backend - always string
+  creator_id: uuidSchema, // UUID from backend - always string
   file_id: uuidSchema.optional().nullable(),
   title: z.string().min(1),
   artist: z.string().min(1),
diff --git a/apps/web/src/types/api.ts b/apps/web/src/types/api.ts
index 6dda01b1b..51a939037 100644
--- a/apps/web/src/types/api.ts
+++ b/apps/web/src/types/api.ts
@@ -51,7 +51,9 @@ export interface Conversation {
 }
 
 export interface Track {
+  // UUID from backend - always string
   id: string;
+  // UUID from backend - always string
   creator_id: string; // Backend uses creator_id (not artist_id)
   file_id?: string; // nullable UUID
   title: string;
diff --git a/apps/web/src/types/index.ts b/apps/web/src/types/index.ts
index 5d23deff8..bcb2bd16e 100644
--- a/apps/web/src/types/index.ts
+++ b/apps/web/src/types/index.ts
@@ -74,6 +74,7 @@ export interface Conversation {
 }
 
 export interface Track {
+  // UUID from backend - always string
   id: string;
   title: string;
   artist: string;