Normalize hashtags to lowercase when publishing blog posts

Co-authored-by: mroxso <24775431+mroxso@users.noreply.github.com>

src/hooks/usePublishBlogPost.ts

@@ -47,7 +47,7 @@ export function usePublishBlogPost() {
 
       if (data.hashtags && data.hashtags.length > 0) {
         data.hashtags.forEach(tag => {
-          tags.push(['t', tag]);
+          tags.push(['t', tag.toLowerCase()]);
         });
       }
 

src/lib/searchInputDetector.test.ts

@@ -68,4 +68,16 @@ describe('detectSearchInputType', () => {
     expect(result.type).toBe('hashtag');
     expect(result.value).toBe('#bitcoin');
   });
+
+  it('detects hashtags with capital letters', () => {
+    const result = detectSearchInputType('#BR');
+    expect(result.type).toBe('hashtag');
+    expect(result.value).toBe('#BR');
+  });
+
+  it('detects hashtags with mixed case', () => {
+    const result = detectSearchInputType('#Bitcoin');
+    expect(result.type).toBe('hashtag');
+    expect(result.value).toBe('#Bitcoin');
+  });
 });