Merge upstream/main: v0.1.102-v0.1.106 updates

- Remove GitHub link from user dropdown (TianShuAPI customization)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/internal/setup/handler.go

@@ -247,6 +247,12 @@ func install(c *gin.Context) {
 		return
 	}
 
+	req.Admin.Email = strings.TrimSpace(req.Admin.Email)
+	req.Database.Host = strings.TrimSpace(req.Database.Host)
+	req.Database.User = strings.TrimSpace(req.Database.User)
+	req.Database.DBName = strings.TrimSpace(req.Database.DBName)
+	req.Redis.Host = strings.TrimSpace(req.Redis.Host)
+
 	// ========== COMPREHENSIVE INPUT VALIDATION ==========
 	// Database validation
 	if !validateHostname(req.Database.Host) {
@@ -319,13 +325,6 @@ func install(c *gin.Context) {
 		return
 	}
 
-	// Trim whitespace from string inputs
-	req.Admin.Email = strings.TrimSpace(req.Admin.Email)
-	req.Database.Host = strings.TrimSpace(req.Database.Host)
-	req.Database.User = strings.TrimSpace(req.Database.User)
-	req.Database.DBName = strings.TrimSpace(req.Database.DBName)
-	req.Redis.Host = strings.TrimSpace(req.Redis.Host)
-
 	cfg := &SetupConfig{
 		Database: req.Database,
 		Redis:    req.Redis,

backend/internal/setup/setup.go

@@ -164,8 +164,8 @@ func NeedsSetup() bool {
 func TestDatabaseConnection(cfg *DatabaseConfig) error {
 	// First, connect to the default 'postgres' database to check/create target database
 	defaultDSN := fmt.Sprintf(
-		"host=%s port=%d user=%s password=%s dbname=postgres sslmode=%s",
-		cfg.Host, cfg.Port, cfg.User, cfg.Password, cfg.SSLMode,
+		"host=%s port=%d user=%s password=%s dbname=%s sslmode=%s",
+		cfg.Host, cfg.Port, cfg.User, cfg.Password, cfg.DBName, cfg.SSLMode,
 	)
 
 	db, err := sql.Open("postgres", defaultDSN)