Add R2 image uploads to admin

backend/internal/admin/config.go

@@ -27,6 +27,7 @@ type Config struct {
 	LogMaxBackups int
 	DeepSeek      DeepSeekConfig
 	LocalLLM      LocalLLMConfig
+	R2            R2Config
 	SlugProvider  string
 }
 
@@ -44,6 +45,17 @@ type LocalLLMConfig struct {
 	NumPredict  int
 }
 
+type R2Config struct {
+	Endpoint        string
+	Bucket          string
+	Prefix          string
+	AccessKeyID     string
+	SecretAccessKey string
+	Region          string
+	PublicBaseURL   string
+	MaxUploadBytes  int64
+}
+
 type localConfig struct {
 	Database struct {
 		PostgresDSN string `yaml:"postgres_dsn"`
@@ -64,6 +76,16 @@ type localConfig struct {
 		TopP        float64 `yaml:"top_p"`
 		NumPredict  int     `yaml:"num_predict"`
 	} `yaml:"local_llm"`
+	R2 struct {
+		Endpoint        string `yaml:"endpoint"`
+		Bucket          string `yaml:"bucket"`
+		Prefix          string `yaml:"prefix"`
+		AccessKeyID     string `yaml:"accessKeyId"`
+		SecretAccessKey string `yaml:"secretAccessKey"`
+		Region          string `yaml:"region"`
+		PublicBaseURL   string `yaml:"publicBaseUrl"`
+		MaxUploadBytes  int64  `yaml:"maxUploadBytes"`
+	} `yaml:"r2"`
 }
 
 func LoadConfig() Config {
@@ -144,6 +166,16 @@ func LoadConfig() Config {
 			TopP:        firstNonZeroFloat(envFloat("LOCAL_LLM_TOP_P"), local.LocalLLM.TopP, 0.8),
 			NumPredict:  firstNonZeroInt(envInt("LOCAL_LLM_NUM_PREDICT"), local.LocalLLM.NumPredict, 32),
 		},
+		R2: R2Config{
+			Endpoint:        firstNonEmpty(os.Getenv("OSAET_R2_ENDPOINT"), local.R2.Endpoint),
+			Bucket:          firstNonEmpty(os.Getenv("OSAET_R2_BUCKET"), local.R2.Bucket),
+			Prefix:          firstNonEmpty(os.Getenv("OSAET_R2_PREFIX"), local.R2.Prefix),
+			AccessKeyID:     firstNonEmpty(os.Getenv("OSAET_R2_ACCESS_KEY_ID"), local.R2.AccessKeyID),
+			SecretAccessKey: firstNonEmpty(os.Getenv("OSAET_R2_SECRET_ACCESS_KEY"), local.R2.SecretAccessKey),
+			Region:          firstNonEmpty(os.Getenv("OSAET_R2_REGION"), local.R2.Region, "auto"),
+			PublicBaseURL:   firstNonEmpty(os.Getenv("OSAET_R2_PUBLIC_BASE_URL"), local.R2.PublicBaseURL),
+			MaxUploadBytes:  int64(firstNonZeroInt(envInt("OSAET_R2_MAX_UPLOAD_BYTES"), int(local.R2.MaxUploadBytes), 20*1024*1024)),
+		},
 	}
 }