Skipped unknown CSV columns

X-Lovable-Edit-ID: edt-6db05b6e-69a5-45bd-80ea-5f8573fd3512
Co-authored-by: renee-png <262607627+renee-png@users.noreply.github.com>

src/routes/settings.import.tsx

@@ -549,12 +549,34 @@ function ImportPage() {
 
     const rawRows = parsed.data;
     const headers = parsed.meta.fields ?? [];
-    // Build header → db column map
+    // Allowed target columns = mapped alias targets + transform helper fields.
+    // Anything else (unknown columns / missing schema) is silently skipped.
+    const allowedTargets = new Set<string>([
+      ...Object.values(cfg.aliases),
+      ...(cfg.numeric ?? []),
+      ...(cfg.dateCols ?? []),
+      ...(cfg.datetimeCols ?? []),
+      ...(cfg.boolCols ?? []),
+      ...cfg.required,
+      "external_id",
+      "created_by",
+    ]);
+    // Build header → db column map (only keep known targets)
     const headerMap: Record<string, string> = {};
+    const unknownHeaders: string[] = [];
     for (const h of headers) {
       const n = norm(h);
-      const target = cfg.aliases[n] ?? n;
-      headerMap[h] = target;
+      const target = cfg.aliases[n];
+      if (target && allowedTargets.has(target)) {
+        headerMap[h] = target;
+      } else if (allowedTargets.has(n)) {
+        headerMap[h] = n;
+      } else {
+        unknownHeaders.push(h);
+      }
+    }
+    if (unknownHeaders.length > 0) {
+      console.info(`[import:${cfg.key}] skipped unknown columns:`, unknownHeaders);
     }
 
     const mapped: Row[] = [];