feat: add SEO, reassurance, subheading, and footer translation keys to all 4 locales

messages/en.json

@@ -1,14 +1,17 @@
 {
   "meta": {
-    "title": "Ombrora — Video downloader"
+    "title": "Ombrora -- Free Video Downloader",
+    "description": "Download YouTube, Vimeo, and more in mp4, mp3, webm -- free, fast, no account required."
   },
   "home": {
-    "heading": "Ombrora",
+    "heading": "Download your videos for free",
+    "subheading": "Free, fast, no account required",
     "urlLabel": "Video URL",
     "format": "Format",
     "quality": "Quality",
-    "subtitles": "Download subtitles (fr, en)",
-    "advanced": "Advanced options (optional, JSON)",
+    "subtitles": "Subtitles (fr, en)",
+    "advanced": "Advanced options",
+    "formats": "mp4 · mp3 · webm · mkv",
     "submit": "Download",
     "submitting": "Sending...",
     "errorRateLimit": "Too many submissions. Try again in an hour.",
@@ -27,5 +30,18 @@
     "failed": "Download failed.",
     "deleted": "The file has expired and was deleted. The download is no longer available.",
     "unknown": "Unknown status"
+  },
+  "reassurance": {
+    "free": "Free",
+    "freeDesc": "No account, no sign-up",
+    "fast": "Fast",
+    "fastDesc": "Ready in seconds",
+    "private": "Private",
+    "privateDesc": "No data retained",
+    "formats": "Multi-format",
+    "formatsDesc": "mp4, mp3, webm, mkv -- up to 1080p"
+  },
+  "footer": {
+    "copyright": "© 2026 Ombrora"
   }
 }