style(server): fix all clippy warnings including derivable traits, redundant locals, collapsible blocks and needless borrows

server/src/handlers_v2/workspaces.rs

@@ -22,7 +22,7 @@ impl McpTool for PinFileHandler {
     async fn execute(&self, args: Value, state: Arc<MemoryState>) -> Result<String, String> {
         let req: PinFileTool = serde_json::from_value(args).map_err(|e| e.to_string())?;
         state.pinned_files.modify(|pinned| {
-            pinned.retain(|p| !(p.namespace == req.namespace && p.file_path == req.file_path));
+            pinned.retain(|p| p.namespace != req.namespace || p.file_path != req.file_path);
             pinned.push(crate::models::PinnedFile {
                 namespace: req.namespace,
                 file_path: req.file_path,
@@ -52,7 +52,7 @@ impl McpTool for UnpinFileHandler {
     async fn execute(&self, args: Value, state: Arc<MemoryState>) -> Result<String, String> {
         let req: UnpinFileTool = serde_json::from_value(args).map_err(|e| e.to_string())?;
         state.pinned_files.modify(|pinned| {
-            pinned.retain(|p| !(p.namespace == req.namespace && p.file_path == req.file_path))
+            pinned.retain(|p| p.namespace != req.namespace || p.file_path != req.file_path)
         });
         Ok("File unpinned".to_string())
     }
@@ -79,11 +79,11 @@ impl McpTool for ListPinnedFilesHandler {
             let filtered: Vec<_> = pinned.iter().filter(|p| {
                 let ns_match = match &req.namespace {
                     Some(ns) => &p.namespace == ns,
-                    None => true,
+                    std::option::Option::None => true,
                 };
                 let branch_match = match &req.git_branch {
                     Some(branch) => p.git_branch.is_none() || p.git_branch.as_deref() == Some(branch.as_str()),
-                    None => true,
+                    std::option::Option::None => true,
                 };
                 ns_match && branch_match
             }).collect();
@@ -206,7 +206,7 @@ impl McpTool for SaveContextWorkspaceHandler {
         let req: SaveContextWorkspaceTool =
             serde_json::from_value(args).map_err(|e| e.to_string())?;
         state.context_workspaces.modify(|ws| {
-            ws.retain(|w| !(w.namespace == req.namespace && w.name == req.name));
+            ws.retain(|w| w.namespace != req.namespace || w.name != req.name);
             ws.push(crate::models::ContextWorkspace {
                 namespace: req.namespace,
                 name: req.name,