Update dependencies and refactor encryption logic

Updates multiple dependencies to their latest versions in Cargo.lock and Cargo.toml.
Refactors encryption logic to use updated getrandom API.
Improves tray speed rate display by using ab_glyph for font rendering.

src-tauri/src/config/encrypt.rs

@@ -16,7 +16,7 @@ pub fn encrypt_data(data: &str) -> Result<String, Box<dyn std::error::Error>> {
 
     // Generate random nonce
     let mut nonce = vec![0u8; NONCE_LENGTH];
-    getrandom::getrandom(&mut nonce)?;
+    getrandom::fill(&mut nonce)?;
 
     // Encrypt data
     let ciphertext = cipher