Add short video configuration and related API endpoints

- Updated .env.example to include SHORT_VIDEO_API_KEY, SHORT_VIDEO_FREE_QUOTA, and SHORT_VIDEO_TIMEOUT_SECONDS.
- Enhanced main.go to auto-migrate new VideoParseLog and VideoParseUnlock models.
- Introduced VideoService and VideoHandler for handling video-related operations.
- Added protected API routes for removing watermarks and unlocking video features.
- Updated config.go to support short video configuration settings.
- Expanded documentation to reflect new features and configuration options.

config/config.go

@@ -3,14 +3,17 @@ package config
 import (
 	"log"
 	"os"
+	"strconv"
+	"time"
 
 	"github.com/joho/godotenv"
 )
 
 type Config struct {
-	Server   ServerConfig
-	Database DatabaseConfig
-	JWT      JWTConfig
+	Server     ServerConfig
+	Database   DatabaseConfig
+	JWT        JWTConfig
+	ShortVideo ShortVideoConfig
 }
 
 type ServerConfig struct {
@@ -31,6 +34,12 @@ type JWTConfig struct {
 	Expire int
 }
 
+type ShortVideoConfig struct {
+	APIKey         string
+	FreeDailyQuota int
+	RequestTimeout time.Duration
+}
+
 var AppConfig *Config
 
 func LoadConfig() {
@@ -55,6 +64,11 @@ func LoadConfig() {
 			Secret: getEnv("JWT_SECRET", "your-secret-key"),
 			Expire: 86400, // 24小时
 		},
+		ShortVideo: ShortVideoConfig{
+			APIKey:         getEnv("SHORT_VIDEO_API_KEY", ""),
+			FreeDailyQuota: getEnvAsInt("SHORT_VIDEO_FREE_QUOTA", 20),
+			RequestTimeout: time.Duration(getEnvAsInt("SHORT_VIDEO_TIMEOUT_SECONDS", 5)) * time.Second,
+		},
 	}
 }
 
@@ -64,3 +78,12 @@ func getEnv(key, defaultValue string) string {
 	}
 	return defaultValue
 }
+
+func getEnvAsInt(key string, defaultValue int) int {
+	if value := os.Getenv(key); value != "" {
+		if v, err := strconv.Atoi(value); err == nil {
+			return v
+		}
+	}
+	return defaultValue
+}