Remove debug logs and fix Google button dark mode

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

main.go

@@ -28,16 +28,11 @@ var (
 )
 
 func init() {
-	log.Println("starting up")
-
 	templates = template.Must(template.New("").ParseGlob("static/*.html"))
 	template.Must(templates.ParseGlob("static/*.js"))
 
-	pgconn := os.Getenv("PGCONN")
-	log.Println("connecting to database:", pgconn[:min(len(pgconn), 30)]+"...")
-
 	var err error
-	db, err = sql.Open("postgres", pgconn)
+	db, err = sql.Open("postgres", os.Getenv("PGCONN"))
 	if err != nil {
 		log.Fatal("[ERROR] failed to open database: ", err)
 	}

static/app.js

@@ -81,10 +81,11 @@ export async function auth() {
             }
         });
 
+        const isDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
         google.accounts.id.renderButton(signin, {
             type: 'standard',
             size: 'large',
-            theme: 'outline',
+            theme: isDark ? 'filled_black' : 'outline',
             text: 'sign_in_with',
             shape: 'rectangular',
             logo_alignment: 'left'