feat: file variety, user status, DND gate, drag-drop, mentions, link preview, emoji picker, soundboard, ringtone

Attachments
- Video: native <video controls>, decrypted blob, metadata preload
- PDF: collapsible <object> viewer with download + preview toggle
- Generic: file card with lazy decrypt, mime-to-extension map
- MessageBubble dispatch: audio/image/video/pdf/generic by mime
- Composer accept widened from image/* to any; AttachmentPreview renders
  non-images as file cards

User status
- usePeerPresence returns { state, statusMessage } and tracks both fields
  via realtime updates
- ConversationHeader subtitle shows custom status_message when peer is
  online/idle/dnd (with message set); falls back to localized presence
  label; always "Offline" when state === 'offline'
- UserBar: status_message input in dropdown (max 128 chars, save on
  blur/Enter), subtitle uses same precedence as peer view
- AuthContext: auto-flip offline → online on session mount; best-effort
  offline on beforeunload/pagehide; respects explicit idle/dnd/invisible
- i18n: presence.status_placeholder (DE + EN)

DND
- CallUI: incoming ring suppressed when own presence === 'dnd' (outgoing
  rings stay audible — user-initiated)
- CallContext: presenceRef mirrors profile.presenceState, incoming-call
  and missed-call OS notifications skipped under DND
- ConversationsContext already gated message tone + notify

Drag/drop + paste
- Page-root drag handlers feed ingestFiles; overlay shown while dragging
- Textarea onPaste extracts clipboard image items

@mentions in groups
- MentionAutocomplete: keyboard-driven dropdown, arrow/enter/tab/esc
- Composer onChange parses trailing @token, auto-open
- renderBodyWithMentions highlights @username tokens in bubbles

Link previews
- Migration 20260421000003_link_previews.sql (cache table, auth read,
  service-role write via edge function)
- Edge function og-preview: POST {url}, fetches HTML (6s timeout, 1MB
  cap), regex-parses OG/twitter/description, upserts cache
- useLinkPreview hook with in-memory cache + inflight dedup
- LinkPreviewCard rendered from first URL in message body

Emoji picker
- Built-in curated set (~250 emojis) across five categories
- Search by keyword/emoji char/category, recent list persisted in
  localStorage
- Trigger button next to + and voice buttons in composer

Soundboard + ringtone + mic pipeline
- Pulled in (user-authored) SoundboardManagerDialog/Panel/Settings,
  RingtoneSettings, mic pipeline + hotkeys + storage modules
- AuthContext imports updateOwnProfile for presence auto-flip

Fixes
- AttachmentAudio min-width so bubbles don't collapse to 0px on peer
  side
- Focus flicker: visibility/online wake refresh throttled to 30s,
  focus listener dropped, loading flag only on first fetch

packages/shared/src/i18n/locales/de/app.json

@@ -15,7 +15,8 @@
     "idle": "Abwesend",
     "dnd": "Nicht stören",
     "invisible": "Unsichtbar",
-    "offline": "Offline"
+    "offline": "Offline",
+    "status_placeholder": "Status setzen…"
   },
   "chats": {
     "empty_title": "Noch keine Unterhaltungen",
@@ -194,7 +195,61 @@
     "allow_dms_strangers_hint": "Wenn aus, können dich nur Freunde direkt anschreiben.",
     "this_device": "Dieses Gerät",
     "danger_zone": "Gefahrenzone",
-    "sign_out": "Abmelden"
+    "sign_out": "Abmelden",
+    "section_ringtone": "Klingelton",
+    "ringtone_incoming": "Eingehender Anruf",
+    "ringtone_default_active": "Standard-Klingelton (Doppelton)",
+    "ringtone_custom_active": "{{name}} · {{size}} MB",
+    "ringtone_upload": "Hochladen",
+    "ringtone_replace": "Ersetzen",
+    "ringtone_preview": "Vorhören",
+    "ringtone_stop": "Stop",
+    "ringtone_reset": "Zurücksetzen",
+    "ringtone_hint": "MP3, WAV, OGG oder M4A bis 2 MB. Nur für eingehende Anrufe — ausgehend bleibt der Standard.",
+    "ringtone_error_too_large": "Datei zu groß (max {{max}} MB).",
+    "ringtone_error_not_audio": "Nur Audio-Dateien werden unterstützt.",
+    "ringtone_error_generic": "Ringtone konnte nicht gespeichert werden.",
+    "ringtone_error_play": "Ringtone konnte nicht abgespielt werden.",
+    "section_soundboard": "Soundboard"
+  },
+  "soundboard": {
+    "summary_title": "Deine Sounds",
+    "summary_empty": "Noch keine Sounds vorhanden.",
+    "summary_counts": "{{sounds}} Sounds · {{categories}} Kategorien · {{hotkeys}} mit Hotkey",
+    "settings_hint": "Hotkeys sind optional. Sounds lassen sich auch während eines Anrufs direkt im UI abspielen.",
+    "manage": "Verwalten",
+    "manager_title": "Soundboard verwalten",
+    "manager_hint": "Beliebig viele Sounds, kein Hotkey nötig. Hotkeys feuern nur während eines Anrufs.",
+    "add": "Sound hinzufügen",
+    "empty": "Noch keine Sounds. Lade oben welche hoch.",
+    "category_placeholder": "Kategorie…",
+    "category_uncategorized": "(Ohne Kategorie)",
+    "hotkey_capture": "Hotkey binden (Esc = abbrechen)",
+    "hotkey_press": "Drücke…",
+    "hotkey_none": "Kein Hotkey",
+    "hotkey_clear": "Hotkey entfernen",
+    "hotkey_conflict_ptt": "Konflikt mit Push-to-Talk.",
+    "hotkey_conflict_sound": "Bereits von \"{{name}}\" belegt.",
+    "gain_title": "Lautstärke",
+    "preview": "Vorhören",
+    "preview_stop": "Stop",
+    "move_up": "Nach oben",
+    "move_down": "Nach unten",
+    "delete": "Löschen",
+    "delete_confirm": "Sound löschen?",
+    "error_too_large": "Datei zu groß (max {{max}} MB).",
+    "error_not_audio": "Nur Audio-Dateien werden unterstützt.",
+    "error_generic": "Sound konnte nicht gespeichert werden.",
+    "toggle": "Soundboard",
+    "panel_title": "Soundboard",
+    "panel_close": "Schließen",
+    "panel_search": "Suche…",
+    "panel_empty": "Keine Sounds gespeichert. Füge welche in den Einstellungen hinzu.",
+    "panel_no_matches": "Keine Treffer.",
+    "panel_master": "Master",
+    "panel_monitor": "Mithören",
+    "panel_stop_all": "Alle stoppen",
+    "pad_stop": "Stoppen"
   },
   "update": {
     "available": "Update verfügbar",

packages/shared/src/i18n/locales/en/app.json

@@ -15,7 +15,8 @@
     "idle": "Idle",
     "dnd": "Do not disturb",
     "invisible": "Invisible",
-    "offline": "Offline"
+    "offline": "Offline",
+    "status_placeholder": "Set status…"
   },
   "chats": {
     "empty_title": "No conversations yet",
@@ -194,7 +195,61 @@
     "allow_dms_strangers_hint": "When off, only friends can DM you.",
     "this_device": "This device",
     "danger_zone": "Danger zone",
-    "sign_out": "Sign out"
+    "sign_out": "Sign out",
+    "section_ringtone": "Ringtone",
+    "ringtone_incoming": "Incoming call",
+    "ringtone_default_active": "Default ringtone (double beep)",
+    "ringtone_custom_active": "{{name}} · {{size}} MB",
+    "ringtone_upload": "Upload",
+    "ringtone_replace": "Replace",
+    "ringtone_preview": "Preview",
+    "ringtone_stop": "Stop",
+    "ringtone_reset": "Reset",
+    "ringtone_hint": "MP3, WAV, OGG or M4A up to 2 MB. Incoming calls only — outgoing keeps the default.",
+    "ringtone_error_too_large": "File too large (max {{max}} MB).",
+    "ringtone_error_not_audio": "Only audio files are supported.",
+    "ringtone_error_generic": "Could not save the ringtone.",
+    "ringtone_error_play": "Could not play the ringtone.",
+    "section_soundboard": "Soundboard"
+  },
+  "soundboard": {
+    "summary_title": "Your sounds",
+    "summary_empty": "No sounds stored yet.",
+    "summary_counts": "{{sounds}} sounds · {{categories}} categories · {{hotkeys}} with hotkey",
+    "settings_hint": "Hotkeys are optional. Sounds can also be played from the in-call panel.",
+    "manage": "Manage",
+    "manager_title": "Manage soundboard",
+    "manager_hint": "Any number of sounds, hotkeys optional. Hotkeys fire only while in a call.",
+    "add": "Add sound",
+    "empty": "No sounds yet. Upload some above.",
+    "category_placeholder": "Category…",
+    "category_uncategorized": "(Uncategorized)",
+    "hotkey_capture": "Bind hotkey (Esc = cancel)",
+    "hotkey_press": "Press…",
+    "hotkey_none": "No hotkey",
+    "hotkey_clear": "Clear hotkey",
+    "hotkey_conflict_ptt": "Conflicts with Push-to-Talk.",
+    "hotkey_conflict_sound": "Already bound to \"{{name}}\".",
+    "gain_title": "Volume",
+    "preview": "Preview",
+    "preview_stop": "Stop",
+    "move_up": "Move up",
+    "move_down": "Move down",
+    "delete": "Delete",
+    "delete_confirm": "Delete this sound?",
+    "error_too_large": "File too large (max {{max}} MB).",
+    "error_not_audio": "Only audio files are supported.",
+    "error_generic": "Could not save the sound.",
+    "toggle": "Soundboard",
+    "panel_title": "Soundboard",
+    "panel_close": "Close",
+    "panel_search": "Search…",
+    "panel_empty": "No sounds stored. Add some from settings.",
+    "panel_no_matches": "No matches.",
+    "panel_master": "Master",
+    "panel_monitor": "Monitor",
+    "panel_stop_all": "Stop all",
+    "pad_stop": "Stop"
   },
   "update": {
     "available": "Update available",