Improve database column check and update frontend z-index styling

Enhanced the `_has_column` function to handle database dialects cleanly, reducing unnecessary PostgreSQL logs. Adjusted frontend z-index values to ensure proper element stacking in the UI.

backend/app/main.py

@@ -40,22 +40,33 @@ def _rand_join_code(n: int = 6) -> str:
 
 def _has_column(db: Session, table: str, col: str) -> bool:
     """
-SQLite + Postgres friendly check.
-We use a pragma first (SQLite), fallback to information_schema.
+Postgres + SQLite friendly check without spamming Postgres logs.
+- SQLite: PRAGMA table_info
+- Postgres: information_schema
     """
+    dialect = None
     try:
-        rows = db.execute(text(f"PRAGMA table_info({table})")).all()
-        return any(r[1] == col for r in rows)  # pragma: column name is at index 1
+        dialect = db.get_bind().dialect.name  # "postgresql" | "sqlite" | ...
     except Exception:
-        db.rollback()
+        dialect = None
 
+    if dialect == "sqlite":
+        try:
+            rows = db.execute(text(f"PRAGMA table_info({table})")).all()
+            return any(r[1] == col for r in rows)
+        except Exception:
+            db.rollback()
+            return False
+
+    # default: Postgres (or others) via information_schema
     try:
         rows = db.execute(
             text(
                 """
-SELECT column_name
+SELECT 1
 FROM information_schema.columns
 WHERE table_name = :t AND column_name = :c
+LIMIT 1
                 """
             ),
             {"t": table, "c": col},
@@ -64,6 +75,7 @@ WHERE table_name = :t AND column_name = :c
     except Exception:
         db.rollback()
         return False
+        
 
 
 def _auto_migrate(db: Session):

frontend/src/styles/styles.js

@@ -16,6 +16,8 @@ export const styles = {
   },
 
   topBar: {
+    position: "relative",
+    zIndex: 50,
     display: "flex",
     justifyContent: "space-between",
     alignItems: "center",
@@ -153,6 +155,8 @@ export const styles = {
 
   // Admin
   adminWrap: {
+    position: "relative",
+    zIndex: 1,
     marginTop: 14,
     padding: 12,
     borderRadius: 16,
@@ -471,7 +475,7 @@ export const styles = {
     background: "linear-gradient(180deg, rgba(20,20,24,0.96), rgba(12,12,14,0.92))",
     boxShadow: "0 18px 55px rgba(0,0,0,0.70)",
     overflow: "hidden",
-    zIndex: 10000,
+    zIndex: 99999,
     backdropFilter: "blur(8px)",
   },