fix: Resolve 4 Rust 1.93.0 Clippy lints in zipherx-ffi

- Collapse nested if statements for tor-only mode checks
- Use inspect_err instead of map_err returning unchanged error
- Allow empty_line_after_doc_comments for UniFFI generated code

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: VictorLux

crates/zipherx-ffi/src/lib.rs

@@ -1,3 +1,6 @@
+// Suppress lint on UniFFI-generated code (empty lines after doc comments in scaffolding).
+#![allow(clippy::empty_line_after_doc_comments)]
+
 //! ZipherX FFI bindings — UniFFI interface for cross-platform access.
 //!
 //! This crate generates native bindings for:
@@ -787,14 +790,12 @@ static SYNC_TASK: Mutex<Option<tokio::task::JoinHandle<()>>> = Mutex::new(None);
 fn start_sync(callback: Box<dyn SyncProgressCallback>) -> Result<(), WalletError> {
     // RF-18: When TOR_ONLY_MODE is enabled, verify Tor is ready before any
     // network operation. Prevents boost download and sync from bypassing Tor.
-    if zipherx_tor::client::is_tor_only_mode() {
-        if !zipherx_tor::client::is_socks_running() {
-            return Err(WalletError::NetworkError {
-                msg: "Tor-only mode is enabled but Tor SOCKS5 proxy is not running. \
-                      Start Tor before syncing."
-                    .into(),
-            });
-        }
+    if zipherx_tor::client::is_tor_only_mode() && !zipherx_tor::client::is_socks_running() {
+        return Err(WalletError::NetworkError {
+            msg: "Tor-only mode is enabled but Tor SOCKS5 proxy is not running. \
+                  Start Tor before syncing."
+                .into(),
+        });
     }
 
     let wallet = get_wallet()?;
@@ -1269,12 +1270,10 @@ fn send_with_progress(
     }
 
     // Finding 4: Verify Tor proxy when tor-only mode is active
-    if zipherx_tor::client::is_tor_only_mode() {
-        if !zipherx_tor::client::is_socks_running() {
-            return Err(WalletError::NetworkError {
-                msg: "Tor-only mode enabled but Tor SOCKS5 proxy is not running".into(),
-            });
-        }
+    if zipherx_tor::client::is_tor_only_mode() && !zipherx_tor::client::is_socks_running() {
+        return Err(WalletError::NetworkError {
+            msg: "Tor-only mode enabled but Tor SOCKS5 proxy is not running".into(),
+        });
     }
 
     // RF-12: Concurrency guard — prevent overlapping sends
@@ -1294,9 +1293,8 @@ fn send_with_progress(
         }
     }
 
-    let wallet = get_wallet().map_err(|e| {
+    let wallet = get_wallet().inspect_err(|_| {
         IS_SENDING.store(false, Ordering::SeqCst);
-        e
     })?;
     let callback = Arc::new(callback);