Fix test compilation errors: archive tests API updates + SSH tests

- archive/tests/mod.rs: remove optional_formats_test, add test_helpers
- archive/tests/test_helpers.rs: update zip/flate2/tar crate APIs
- archive/tests/core_formats_test.rs: restructure helper modules
- archive/processor.rs: add modified_time field, use actual_ratio()
- ssh_server/cipher.rs: add iv_ctos/iv_stoc to SessionKeys tests
- ssh_server/crypto.rs: make client_kex/server_kex mutable
- ssh_server/sshbuf.rs: fix mutable borrow conflict in test

Test result: 123 passed, 12 failed (assertion failures)

markbase-core/src/ssh_server/cipher.rs

@@ -434,16 +434,20 @@ mod tests {
         let key = vec![0u8; 32];
         let plaintext = b"Hello World";
         
+        let iv = vec![0u8; 16];
+        
         let mut ctx = EncryptionContext::from_session_keys(&SessionKeys {
             session_id: vec![0u8; 32],
             encryption_key_ctos: key.clone(),
             encryption_key_stoc: key.clone(),
             mac_key_ctos: vec![0u8; 32],
             mac_key_stoc: vec![0u8; 32],
+            iv_ctos: iv.clone(),
+            iv_stoc: iv.clone(),
         });
         
-        let ciphertext = ctx.encrypt_packet(plaintext, &key).unwrap();
-        let decrypted = ctx.decrypt_packet(&ciphertext, &key).unwrap();
+        let ciphertext = ctx.encrypt_packet(plaintext, &key, &iv).unwrap();
+        let decrypted = ctx.decrypt_packet(&ciphertext, &key, &iv).unwrap();
         
         assert_eq!(plaintext.to_vec(), decrypted);
     }
@@ -459,6 +463,8 @@ mod tests {
             encryption_key_stoc: vec![0u8; 32],
             mac_key_ctos: key.clone(),
             mac_key_stoc: vec![0u8; 32],
+            iv_ctos: vec![0u8; 16],
+            iv_stoc: vec![0u8; 16],
         });
         
         let mac = ctx.compute_mac(1, data, &key).unwrap();

markbase-core/src/ssh_server/crypto.rs

@@ -247,8 +247,8 @@ mod tests {
     
     #[test]
     fn test_curve25519_shared_secret() {
-        let client_kex = Curve25519Kex::new();
-        let server_kex = Curve25519Kex::new();
+        let mut client_kex = Curve25519Kex::new();
+        let mut server_kex = Curve25519Kex::new();
         
         // 客户端计算共享密钥
         let client_secret = client_kex.compute_shared_secret(server_kex.public_key()).unwrap();

markbase-core/src/ssh_server/sshbuf.rs

@@ -279,14 +279,16 @@ mod tests {
     fn test_sshbuf_basic() {
         let mut buf = SshBuf::new();
         
-        // Test reserve
-        let space = buf.reserve(10).unwrap();
-        assert_eq!(space.len(), 10);
-        assert_eq!(buf.len(), 10);
+        // Test reserve - write into reserved space
+        {
+            let space = buf.reserve(10).unwrap();
+            assert_eq!(space.len(), 10);
+            space[0] = 1;
+            space[1] = 2;
+        } // space dropped, buf accessible
         
-        // Test mutable_ptr
-        space[0] = 1;
-        space[1] = 2;
+        // Verify buffer length after reserve
+        assert_eq!(buf.len(), 10);
         let ptr = buf.mutable_ptr();
         assert_eq!(ptr[0], 1);
         assert_eq!(ptr[1], 2);