Fix SPA routing and static file paths

backend/internal/api/routes/routes.go

@@ -27,8 +27,6 @@ func SetupRoutes(r *gin.Engine) {
 
 	r.Use(middlewares.CORSMiddleware())
 
-	r.Static("/uploads", "./uploads")
-
 	api := r.Group("/api")
 	{
 		api.GET("/installed", authHandler.CheckInstalled)
@@ -204,4 +202,24 @@ func SetupRoutes(r *gin.Engine) {
 			}
 		}
 	}
+
+	// Serve uploads
+	r.Static("/uploads", "./uploads")
+
+	// SPA fallback - serve index.html for all other routes (Vue Router History Mode)
+	// This must be the last route to catch all unmatched paths
+	r.NoRoute(func(c *gin.Context) {
+		path := c.Request.URL.Path
+		// Serve index.html for all non-API routes (Vue Router History Mode)
+		// But skip API, assets, and uploads paths
+		if path == "/" || path == "/favicon.ico" || path == "/icons.svg" || path == "/favicon.svg" ||
+		   len(path) > 7 && path[:7] == "/assets/" || len(path) > 9 && path[:9] == "/uploads/" ||
+		   len(path) > 4 && path[:4] == "/api/" {
+			// For root and special paths, serve index.html directly
+			c.File("/app/static/index.html")
+		} else {
+			// For all other routes, serve index.html (Vue Router handles client-side routing)
+			c.File("/app/static/index.html")
+		}
+	})
 }