fix(web): render custom HTML and Markdown content consistently (#5760)

* fix(markdown): render announcement markdown consistently

- support soft line breaks for announcement markdown without changing the default parser behavior.
- add explicit markdown element styles so lists, tables, code blocks, and quotes render correctly when typography styles are unavailable.
- apply the announcement markdown mode in both the popover and detail dialog for consistent display.

* refactor(markdown): simplify fallback markdown styles

- remove duplicate typography utility classes now covered by explicit markdown element fallbacks.
- keep the markdown renderer behavior unchanged while reducing class noise.
- modernize small helper expressions to satisfy targeted lint checks.

* fix(content): render custom HTML consistently

- add shared rich content rendering so custom HTML and Markdown use the same path across public pages and announcements.
- reuse common URL and HTML detection instead of duplicating content format checks per page.
- keep custom home content inside the standard public layout while preserving full-page iframe rendering for external URLs.

web/default/src/features/home/hooks/use-home-page-content.ts

@@ -19,6 +19,7 @@ For commercial licensing, please contact support@quantumnous.com
 import { useEffect, useState } from 'react'
 import i18next from 'i18next'
 import { toast } from 'sonner'
+import { isHttpUrl } from '@/lib/content-format'
 import { getHomePageContent } from '../api'
 import type { HomePageContentResult } from '../types'
 
@@ -75,13 +76,7 @@ export function useHomePageContent(): HomePageContentResult {
     }
   }, [])
 
-  let isUrl = false
-  try {
-    const url = new URL(content)
-    isUrl = url.protocol === 'http:' || url.protocol === 'https:'
-  } catch {
-    // not a URL
-  }
+  const isUrl = isHttpUrl(content)
 
   return { content, isLoaded, isUrl }
 }