Update dependencies and refactor SHA256 hash encoding

- Updated `crossterm` from version 0.28 to 0.29.
- Upgraded `reqwest` from version 0.12 to 0.13 and added "form" feature.
- Bumped `serde_yaml_ng` from version 0.9 to 0.10.
- Increased `dirs` version from 5 to 6.
- Updated `rusqlite` from version 0.32 to 0.40.
- Upgraded `infer` from version 0.16 to 0.19.
- Bumped `sha2` from version 0.10 to 0.11.
- Updated `rmcp` from version 1.8 to 2.2.
- Refactored SHA256 hash encoding in `rewind.rs`, `mod.rs`, and `rest.rs` to use `hex::encode` instead of formatting with `{:x}` for better clarity and consistency.

src/app/runtime/actions/mod.rs

@@ -1538,7 +1538,7 @@ fn execute_one_tool(
                     let hash = sha2::Sha256::digest(
                         content.and_then(|v| v.as_str()).unwrap_or("").as_bytes(),
                     );
-                    format!("{hash:x}")
+                    hex::encode(hash)
                 };
                 let bytes_delta = if name == "write" {
                     args.get("content")
@@ -1674,7 +1674,7 @@ fn run_oauth_flow(provider: &str) -> anyhow::Result<String> {
 
     let verifier = CodeVerifier::new();
     let challenge = verifier.challenge();
-    let state_token = format!("{:x}", sha2::Sha256::digest(rand_bytes(16)));
+    let state_token = hex::encode(sha2::Sha256::digest(rand_bytes(16)));
 
     let mut manager = OAuthManager::new(config.clone());
     let auth_url = manager.build_auth_url(&redirect_uri, &state_token, challenge.as_str());