fix(gui): clean up unused code comments in Git components (#326)

- BlameView.tsx: Simplified groupedLines comment (prepared for future feature)
- BranchComparison.tsx: Removed unused signal declarations and replaced with concise notes
- DiffView.tsx: Replaced void statements with cleaner documentation comments
- cortex-agents/src/control.rs: Fixed import ordering via cargo fmt

These changes reduce code noise while preserving documentation about
planned features in the Git components.

Co-authored-by: Droid Agent <droid@factory.ai>

Author: echobt

cortex-gui/src/components/git/BlameView.tsx

@@ -81,20 +81,8 @@ export function BlameView(props: BlameViewProps) {
     return colors[index % colors.length];
   };
 
-  // Group consecutive lines by commit (prepared for future grouped view feature)
-  // const groupedLines = () => {
-  //   const groups: { commit: BlameLine["commit"]; lines: BlameLine[] }[] = [];
-  //   let currentGroup: { commit: BlameLine["commit"]; lines: BlameLine[] } | null = null;
-  //   for (const line of blameData()) {
-  //     if (!currentGroup || currentGroup.commit.hash !== line.commit.hash) {
-  //       currentGroup = { commit: line.commit, lines: [line] };
-  //       groups.push(currentGroup);
-  //     } else {
-  //       currentGroup.lines.push(line);
-  //     }
-  //   }
-  //   return groups;
-  // };
+  // Note: groupedLines prepared for future grouped view feature
+  // Would group consecutive lines by commit for collapsed display
 
   return (
     <div 

cortex-gui/src/components/git/BranchComparison.tsx

@@ -45,10 +45,8 @@ export function BranchComparison(props: BranchComparisonProps) {
   const [stats, setStats] = createSignal<BranchCompareStats | null>(null);
   const [showBaseDropdown, setShowBaseDropdown] = createSignal(false);
   const [showCompareDropdown, setShowCompareDropdown] = createSignal(false);
-  const [_expandedSections, _setExpandedSections] = createSignal({
-    commits: true,
-    files: true
-  });
+  // Note: Expandable sections feature prepared for future use
+  // State would be: const [expandedSections, setExpandedSections] = createSignal({ commits: true, files: true });
   const [viewMode, setViewMode] = createSignal<"commits" | "files">("commits");
 
   createEffect(() => {
@@ -105,13 +103,8 @@ export function BranchComparison(props: BranchComparisonProps) {
     setCompareBranch(base);
   };
 
-  // Prepared for expandable sections (future feature)
-  // const toggleSection = (section: "commits" | "files") => {
-  //   setExpandedSections(prev => ({
-  //     ...prev,
-  //     [section]: !prev[section]
-  //   }));
-  // };
+  // Note: toggleSection prepared for future expandable sections feature
+  // Implementation would toggle expandedSections state for given section
 
   const getFileIcon = (status: string) => {
     switch (status) {
@@ -141,12 +134,8 @@ export function BranchComparison(props: BranchComparisonProps) {
     return date.toLocaleDateString();
   };
 
-  // Prepared for branch filtering (future feature)
-  // const filteredBranches = createMemo(() => {
-  //   return props.branches.filter(b => 
-  //     b.name !== baseBranch() && b.name !== compareBranch()
-  //   );
-  // });
+  // Note: filteredBranches prepared for branch filtering feature
+  // Would filter out currently selected base and compare branches
 
   return (
     <div

cortex-gui/src/components/git/DiffView.tsx

@@ -131,10 +131,9 @@ export function DiffView(props: DiffViewProps) {
   const [editLoading, setEditLoading] = createSignal(false);
   const [savingEdit, setSavingEdit] = createSignal(false);
 
-  // These accessors expose props for use in the component (currently used internally)
-  // Keeping as-is since they're part of the component interface for future enhancements
-  void props.showLineNumbers; // Props used in rendering logic
-  void props.enableWordDiff; // Props used in rendering logic
+  // Note: showLineNumbers and enableWordDiff props are part of the component interface
+  // for future enhancements. They will enable line number display and word-level diff
+  // highlighting when the features are fully implemented.
 
   createEffect(() => {
     if (props.file) {