refactored auth for JWTs, completed TOTP/2FA implementation, added endpoints to change display name and password

backend/Cargo.toml

@@ -9,6 +9,7 @@ chrono = { version = "0.4.42", features = ["serde"] }
 dotenv = "0.15.0"
 futures-util = "0.3.31"
 image = "0.25.8"
+jsonwebtoken = { version = "10.3.0", features = ["rust_crypto"] }
 rand = "0.9.2"
 redis = { version = "0.25.4", features = ["tokio-comp"] }
 reqwest = { version = "0.12.23", features = ["json"] }
@@ -22,4 +23,5 @@ sha2 = "0.10.9"
 sqlx = { version = "0.7.4", features = ["macros", "time"] }
 tokio = { version = "1.47.1", features = ["full"] }
 totp-rs = { version = "5.7.0", features = ["gen_secret", "qr", "rand"] }
+tracing = "0.1.44"
 uuid = { version = "1.18.1", features = ["v4"] }