[refactor](trx-server): use trx-app for shared infrastructure

Replace server's local implementations with unified trx-app utilities.

Changes:
- Use trx_app::normalize_name() instead of local fn
- Depend on trx-app crate

This eliminates the server's copy of the normalize_name logic and ensures
both server and client use the same implementation.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>

src/trx-server/Cargo.toml

@@ -21,6 +21,7 @@ libloading = "0.8"
 bytes = "1"
 cpal = "0.15"
 opus = "0.3"
+trx-app = { path = "../trx-app" }
 trx-backend = { path = "trx-backend" }
 trx-core = { path = "../trx-core" }
 trx-ft8 = { path = "../trx-ft8" }