chore: remove direct avatar upload endpoint (POST /profile/avatar);

feat: add endpoints for presigned upload URLs (GET /upload/avatar, GET /upload/image);
refactor: replace ProfileDto with NewProfileDto in update profile endpoint;
feat: implement S3 integration for avatar management;
fix: update database queries to handle new avatar upload flow;
chore: add new dependencies for S3 handling (golang.org/x/time);
refactor: rename UploadService to S3Service;
refactor: change return type for func LocalizeS3Url(originalURL string) (*url.URL, error);
feat: add custom validator for upload_id

backend/docs/swagger.yaml

@@ -1,5 +1,22 @@
 basePath: /api/
 definitions:
+  dto.NewProfileDto:
+    properties:
+      avatar_upload_id:
+        type: string
+      bio:
+        type: string
+      birthday:
+        type: integer
+      color:
+        type: string
+      color_grad:
+        type: string
+      name:
+        type: string
+    required:
+    - name
+    type: object
   dto.ProfileDto:
     properties:
       avatar_url:
@@ -14,8 +31,6 @@ definitions:
         type: string
       name:
         type: string
-    required:
-    - name
     type: object
   dto.ProfileSettingsDto:
     properties:
@@ -34,13 +49,6 @@ definitions:
       hide_profile_details:
         type: boolean
     type: object
-  dto.UrlDto:
-    properties:
-      url:
-        type: string
-    required:
-    - url
-    type: object
   models.ChangePasswordRequest:
     properties:
       old_password:
@@ -109,6 +117,15 @@ definitions:
       refresh_token:
         type: string
     type: object
+  models.PresignedUploadResponse:
+    properties:
+      fields:
+        additionalProperties:
+          type: string
+        type: object
+      url:
+        type: string
+    type: object
   models.RefreshRequest:
     properties:
       refresh_token:
@@ -351,7 +368,7 @@ paths:
         name: request
         required: true
         schema:
-          $ref: '#/definitions/dto.ProfileDto'
+          $ref: '#/definitions/dto.NewProfileDto'
       produces:
       - application/json
       responses:
@@ -390,28 +407,6 @@ paths:
       summary: Get profile by username
       tags:
       - Profile
-  /profile/avatar:
-    post:
-      consumes:
-      - multipart/form-data
-      parameters:
-      - description: Avatar image file
-        in: formData
-        name: file
-        required: true
-        type: file
-      produces:
-      - application/json
-      responses:
-        "200":
-          description: Uploaded image url
-          schema:
-            $ref: '#/definitions/dto.UrlDto'
-      security:
-      - JWT: []
-      summary: Upload an avatar
-      tags:
-      - Profile
   /profile/settings:
     get:
       consumes:
@@ -465,6 +460,42 @@ paths:
       summary: Get health status
       tags:
       - Service
+  /upload/avatar:
+    get:
+      consumes:
+      - application/json
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: Presigned URL and form data
+          schema:
+            $ref: '#/definitions/models.PresignedUploadResponse'
+        "500":
+          description: Internal server error
+      security:
+      - JWT: []
+      summary: Get presigned URL for avatar upload
+      tags:
+      - Upload
+  /upload/image:
+    get:
+      consumes:
+      - application/json
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: Presigned URL and form data
+          schema:
+            $ref: '#/definitions/models.PresignedUploadResponse'
+        "500":
+          description: Internal server error
+      security:
+      - JWT: []
+      summary: Get presigned URL for image upload
+      tags:
+      - Upload
 schemes:
 - http
 securityDefinitions: