Fix brand color save: use BusinessBrandColor column, allow # to be optional

- saveBrandColor.cfm: BrandColor -> BusinessBrandColor (normalized column name)
- portal.js: Accept hex colors with or without # prefix in validation
- portal.js: Auto-prepend # when typing bare hex in color input

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

api/businesses/saveBrandColor.cfm

@@ -49,7 +49,7 @@ if (len(brandColor) GT 0) {
 // Update the database
 queryExecute("
   UPDATE Businesses
-  SET BrandColor = :color
+  SET BusinessBrandColor = :color
   WHERE BusinessID = :bizId
 ", {
   color: { value: brandColor, cfsqltype: "cf_sql_varchar" },

portal/portal.js

@@ -1215,6 +1215,7 @@ const Portal = {
 
     hexInput.addEventListener('input', () => {
       let color = hexInput.value;
+      if (/^[0-9A-Fa-f]{6}$/.test(color)) color = '#' + color;
       if (/^#[0-9A-Fa-f]{6}$/.test(color)) {
         colorInput.value = color;
         preview.style.background = `linear-gradient(to bottom, ${color}44, ${color}00, ${color}66)`;
@@ -1225,8 +1226,8 @@ const Portal = {
   // Save brand color
   async saveBrandColor() {
     const color = document.getElementById('brandColorHex').value.toUpperCase();
-    if (!/^#[0-9A-Fa-f]{6}$/.test(color)) {
-      this.toast('Please enter a valid hex color (e.g., #1B4D3E)', 'error');
+    if (!/^#?[0-9A-Fa-f]{6}$/.test(color)) {
+      this.toast('Please enter a valid hex color (e.g., #1B4D3E or 1B4D3E)', 'error');
       return;
     }