feat: fully implement profile controller;

feat: implement file upload handling in controller with size and type validation;
feat: add custom validation rules for bio and color hex fields;
refactor: enhance request handling with dedicated client info extraction;
chore: update profile DTOs with validation tags;
docs: profile controller swagger

backend/internal/services/profile.go

@@ -31,7 +31,7 @@ type ProfileService interface {
 	UpdateProfile(cinfo dto.ClientInfo, newProfile dto.ProfileDto) (bool, error)
 	GetProfileSettings(cinfo dto.ClientInfo) (dto.ProfileSettingsDto, error)
 	UpdateProfileSettings(cinfo dto.ClientInfo, newProfileSettings dto.ProfileSettingsDto) (bool, error)
-	UploadAvatar(cinfo dto.ClientInfo, filePath string)
+	UploadAvatar(cinfo dto.ClientInfo, filePath string) (string, error)
 }
 
 type profileServiceImpl struct {
@@ -64,6 +64,6 @@ func (p *profileServiceImpl) UpdateProfileSettings(cinfo dto.ClientInfo, newProf
 	panic("unimplemented")
 }
 
-func (p *profileServiceImpl) UploadAvatar(cinfo dto.ClientInfo, filePath string) {
+func (p *profileServiceImpl) UploadAvatar(cinfo dto.ClientInfo, filePath string) (string, error) {
 	panic("unimplemented")
 }

backend/internal/services/setup.go

@@ -25,5 +25,6 @@ var Module = fx.Module("services",
     fx.Provide(
 			NewSmtpService,
 			NewAuthService,
+			NewProfileService,
     ),
 )