Fix code quality: trailing whitespace, unused imports, clippy warnings

- Fix trailing whitespace in kex.rs and s3.rs
- Add missing KexProposal import in kex_complete.rs
- Auto-fix clippy warnings across all crates
- All 153 tests pass

markbase-core/src/cli/storage/mount.rs

@@ -22,21 +22,25 @@ pub enum MountCommand {
 
 pub fn handle_mount_command(cmd: MountCommand) -> anyhow::Result<()> {
     match cmd {
-        MountCommand::Attach { type_, server, path } => {
+        MountCommand::Attach {
+            type_,
+            server,
+            path,
+        } => {
             use std::process::Command;
-            
+
             println!("Mounting {} from {} to {}", type_, server, path);
-            
+
             if type_ == "nfs" {
                 let mount_point = std::path::Path::new(&path);
                 std::fs::create_dir_all(mount_point)?;
-                
+
                 let nfs_path = format!("{}:{}", server, path);
-                
+
                 let status = Command::new("mount")
                     .args(["-t", "nfs", &nfs_path, &path])
                     .status()?;
-                
+
                 if status.success() {
                     println!("✓ NFS mounted: {} to {}", nfs_path, path);
                 } else {
@@ -45,31 +49,32 @@ pub fn handle_mount_command(cmd: MountCommand) -> anyhow::Result<()> {
             } else if type_ == "smb" {
                 let mount_point = std::path::Path::new(&path);
                 std::fs::create_dir_all(mount_point)?;
-                
+
                 let smb_path = format!("//{}", server);
-                
+
                 let status = Command::new("mount")
                     .args(["-t", "smbfs", &smb_path, &path])
                     .status()?;
-                
+
                 if status.success() {
                     println!("✓ SMB mounted: {} to {}", smb_path, path);
                 } else {
                     return Err(anyhow::anyhow!("SMB mount failed"));
                 }
             } else {
-                return Err(anyhow::anyhow!("Unknown mount type: {}. Use 'nfs' or 'smb'", type_));
+                return Err(anyhow::anyhow!(
+                    "Unknown mount type: {}. Use 'nfs' or 'smb'",
+                    type_
+                ));
             }
         }
         MountCommand::Detach { path } => {
             use std::process::Command;
-            
+
             println!("Unmounting {}", path);
-            
-            let status = Command::new("umount")
-                .arg(&path)
-                .status()?;
-            
+
+            let status = Command::new("umount").arg(&path).status()?;
+
             if status.success() {
                 println!("✓ Unmounted: {}", path);
             } else {
@@ -78,14 +83,13 @@ pub fn handle_mount_command(cmd: MountCommand) -> anyhow::Result<()> {
         }
         MountCommand::List => {
             use std::process::Command;
-            
+
             println!("Listing mounted storage");
-            
-            let output = Command::new("mount")
-                .output()?;
-            
+
+            let output = Command::new("mount").output()?;
+
             let mounts = String::from_utf8_lossy(&output.stdout);
-            
+
             println!("=== Mounted Filesystems ===");
             for line in mounts.lines() {
                 if line.contains("nfs") || line.contains("smbfs") || line.contains("fuse") {
@@ -95,4 +99,4 @@ pub fn handle_mount_command(cmd: MountCommand) -> anyhow::Result<()> {
         }
     }
     Ok(())
-}
+}