Add branding options and Twitter handle support

src/App.tsx

@@ -41,6 +41,7 @@ import code, {
   ImageOptions,
   PageMetadata,
   StructuredDataOptions,
+  BrandingOptions,
 } from "./code";
 import "./styles.css";
 
@@ -141,6 +142,11 @@ export default function App() {
     organizationName: "",
     logoUrl: "",
   });
+  const [branding, setBranding] = useState<BrandingOptions>({
+    siteName: "",
+    brandReplacement: "",
+    twitterHandle: "",
+  });
   const [slugMetadataExpanded, setSlugMetadataExpanded] = useState<
     Record<number, boolean>
   >({});
@@ -231,6 +237,17 @@ export default function App() {
     setCopied(false);
   }
 
+  function handleBrandingChange(
+    field: keyof BrandingOptions,
+    value: string,
+  ): void {
+    setBranding({
+      ...branding,
+      [field]: value,
+    });
+    setCopied(false);
+  }
+
   function toggleSlugMetadata(index: number): void {
     setSlugMetadataExpanded({
       ...slugMetadataExpanded,
@@ -292,6 +309,7 @@ export default function App() {
     optionImage,
     pageMetadata,
     structuredData,
+    branding,
   };
 
   const script = noError ? code(codeData) : undefined;
@@ -711,6 +729,55 @@ export default function App() {
                 size="small"
               />
 
+              <Box sx={{ mt: 3, pt: 2, borderTop: 1, borderColor: "grey.300" }}>
+                <Typography
+                  variant="subtitle2"
+                  color="text.secondary"
+                  gutterBottom
+                >
+                  Branding & Social
+                </Typography>
+                <TextField
+                  fullWidth
+                  label="Site Name"
+                  margin="dense"
+                  placeholder="My Awesome Site"
+                  helperText="Used for og:site_name meta tag"
+                  onChange={(e) =>
+                    handleBrandingChange("siteName", e.target.value)
+                  }
+                  value={branding.siteName}
+                  variant="outlined"
+                  size="small"
+                />
+                <TextField
+                  fullWidth
+                  label="Brand Replacement"
+                  margin="dense"
+                  placeholder="My Brand"
+                  helperText="Replaces 'Notion' text in meta tags (optional)"
+                  onChange={(e) =>
+                    handleBrandingChange("brandReplacement", e.target.value)
+                  }
+                  value={branding.brandReplacement}
+                  variant="outlined"
+                  size="small"
+                />
+                <TextField
+                  fullWidth
+                  label="Twitter/X Handle"
+                  margin="dense"
+                  placeholder="@username"
+                  helperText="For twitter:site and twitter:creator meta tags"
+                  onChange={(e) =>
+                    handleBrandingChange("twitterHandle", e.target.value)
+                  }
+                  value={branding.twitterHandle}
+                  variant="outlined"
+                  size="small"
+                />
+              </Box>
+
               <Box sx={{ mt: 3, pt: 2, borderTop: 1, borderColor: "grey.300" }}>
                 <Stack
                   direction="row"

src/code.ts

@@ -23,6 +23,12 @@ export interface StructuredDataOptions {
   logoUrl?: string;
 }
 
+export interface BrandingOptions {
+  siteName?: string;
+  brandReplacement?: string;
+  twitterHandle?: string;
+}
+
 export interface CodeData {
   myDomain: string;
   notionUrl: string;
@@ -35,6 +41,7 @@ export interface CodeData {
   optionImage: ImageOptions;
   pageMetadata: Record<string, PageMetadata>;
   structuredData: StructuredDataOptions;
+  branding: BrandingOptions;
 }
 
 function getId(url: string): string {
@@ -60,6 +67,7 @@ export default function code(data: CodeData): string {
     optionImage,
     pageMetadata,
     structuredData,
+    branding,
   } = data;
   let url = myDomain.replace("https://", "").replace("http://", "");
   if (url.slice(-1) === "/") url = url.slice(0, url.length - 1);
@@ -103,6 +111,14 @@ ${slugs
   const ORGANIZATION_NAME = '${structuredData?.organizationName || ""}';
   const LOGO_URL = '${structuredData?.logoUrl || ""}';
 
+  /*
+   * Step 3.3: branding configuration (optional)
+   * Replace Notion branding with your own and add social media handles
+   */
+  const SITE_NAME = '${branding?.siteName || ""}';
+  const BRAND_REPLACEMENT = '${branding?.brandReplacement || ""}';
+  const TWITTER_HANDLE = '${branding?.twitterHandle || ""}';
+
   /* Step 4: enter a Google Font name, you can choose from https://fonts.google.com */
   const GOOGLE_FONT = '${googleFont || ""}';
 
@@ -355,11 +371,21 @@ ${slugs
           return;
         }
       }
-      if (MY_DOMAIN !== '') {
-        if (element.getAttribute('property') === 'og:site_name') {
+      // Set og:site_name - use SITE_NAME if configured, otherwise MY_DOMAIN (Issue #18)
+      if (element.getAttribute('property') === 'og:site_name') {
+        if (SITE_NAME !== '') {
+          element.setAttribute('content', SITE_NAME);
+        } else if (MY_DOMAIN !== '') {
           element.setAttribute('content', MY_DOMAIN);
         }
       }
+      // Replace 'Notion' branding in meta content (Issue #18)
+      if (BRAND_REPLACEMENT !== '') {
+        const content = element.getAttribute('content');
+        if (content && content.includes('Notion')) {
+          element.setAttribute('content', content.replace(/Notion/g, BRAND_REPLACEMENT));
+        }
+      }
       if (pageTitle !== '') {
         if (element.getAttribute('property') === 'og:title'
           || element.getAttribute('name') === 'twitter:title') {
@@ -405,6 +431,12 @@ ${slugs
       element.append(\`<link rel="canonical" href="\${canonicalUrl}">\`, { html: true });
       element.append(\`<meta name="robots" content="index, follow">\`, { html: true });
 
+      // Add Twitter/X meta tags for social cards (Issue #19)
+      if (TWITTER_HANDLE !== '') {
+        element.append(\`<meta name="twitter:site" content="\${TWITTER_HANDLE}">\`, { html: true });
+        element.append(\`<meta name="twitter:creator" content="\${TWITTER_HANDLE}">\`, { html: true });
+      }
+
       // Add JSON-LD structured data for rich search results (Issue #10)
       if (STRUCTURED_DATA_ENABLED) {
         const pageTitle = this.metadata.title || PAGE_TITLE;