refactor: remove video channel type, fix invisible CreateChannel inputs

Voice channels already support video/screen share, so the separate video
type was redundant. Adds migration to convert existing video channels.
Also adds border-border-soft to CreateChannel input fields for visibility.

packages/server/src/db/migrate.ts

@@ -213,6 +213,9 @@ export function runMigrations(db: Database.Database): void {
   // ─── Lowercase all existing usernames ────────────────────────────────────────
   migrateLowercaseUsernames(db);
 
+  // ─── Convert video channels to voice (video type removed) ─────────────────
+  migrateVideoChannels(db);
+
   console.log('Migrations complete.');
 }
 
@@ -583,6 +586,14 @@ function migrateLowercaseUsernames(db: Database.Database): void {
   }
 }
 
+/** Convert any existing video channels to voice (video type removed — voice channels have full video capability) */
+function migrateVideoChannels(db: Database.Database): void {
+  const result = db.prepare("UPDATE channels SET type = 'voice' WHERE type = 'video'").run();
+  if (result.changes > 0) {
+    console.log(`Migrating: Converted ${result.changes} video channel(s) to voice`);
+  }
+}
+
 function migrateReplicatedUsernames(db: Database.Database): void {
   const rows = db.prepare(
     "SELECT id, username, home_instance FROM users WHERE home_instance IS NOT NULL AND username NOT LIKE '%@%'"