[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>

Cargo.toml

@@ -7,6 +7,7 @@ members = [
     "src/trx-ft8",
     "src/trx-core",
     "src/trx-protocol",
+    "src/trx-app",
     "src/trx-server",
     "src/trx-server/trx-backend",
     "src/trx-server/trx-backend/trx-backend-ft817",