refactor: simplify router configuration and handler setup

- Move JWT middleware creation to shared function
- Simplify library route registration
- Add bulk-add-books endpoint to collections
- Clean up duplicate handler setup code
- Improve route organization and maintainability

internal/router/library.go

@@ -3,8 +3,6 @@ package router
 import (
 	"bookhoard/internal/handlers"
 
-	"github.com/golang-jwt/jwt/v5"
-	"github.com/labstack/echo-jwt/v4"
 	"github.com/labstack/echo/v4"
 )
 
@@ -12,24 +10,13 @@ func registerLibraryRoutes(cfg *Config) {
 	e := cfg.Echo
 
 	// JWT middleware for protected routes
-	jwtMiddleware := echojwt.WithConfig(echojwt.Config{
-		SigningKey: []byte(cfg.Cfg.JWTSecret),
-		ContextKey: "user",
-		SuccessHandler: func(c echo.Context) {
-			token := c.Get("user").(*jwt.Token)
-			claims := token.Claims.(jwt.MapClaims)
-			c.Set("user_id", claims["user_id"])
-			c.Set("user_role", claims["user_role"])
-			c.Set("user_email", claims["user_email"])
-			c.Set("user_username", claims["user_username"])
-		},
-	})
+	jwtMiddleware := createJWTMiddleware(cfg)
 
 	// Protected routes group
 	protected := e.Group("/api", jwtMiddleware)
 
-	// Setup ebook handler routes
-	h := handlers.SetupRoutes(protected, cfg.Queries, cfg.ConnManager)
+	// Create handler for library-specific convenience routes
+	h := handlers.NewHandler(cfg.Queries, cfg.ConnManager)
 
 	// Public library types endpoint
 	e.GET("/api/libraries/types", cfg.LibraryHandler.GetLibraryTypes)

internal/router/router.go

@@ -108,6 +108,11 @@ func RegisterRoutes(cfg *Config) {
 	rateLimiter := ratelimit.NewRateLimiter(rateLimiterConfig)
 	rateLimitMiddleware := ratelimit.RateLimiterMiddleware(rateLimiter)
 
+	// Register core application routes (collections, devices, media, etc.) - ONCE
+	jwtMiddleware := createJWTMiddleware(cfg)
+	protected := e.Group("/api", jwtMiddleware)
+	handlers.SetupRoutes(protected, cfg.Queries, cfg.ConnManager)
+
 	// Register route groups
 	registerAuthRoutes(cfg, rateLimitMiddleware)
 	registerLibraryRoutes(cfg)

internal/router/sync.go

@@ -12,8 +12,8 @@ func registerSyncRoutes(cfg *Config) {
 
 	protected := e.Group("/api", jwtMiddleware)
 
-	// Setup ebook handler routes first
-	h := handlers.SetupRoutes(protected, cfg.Queries, cfg.ConnManager)
+	// Create handler for sync-specific routes
+	h := handlers.NewHandler(cfg.Queries, cfg.ConnManager)
 
 	// Book matching and unlinked book resolution routes
 	sync := protected.Group("/sync")