fix: resolve lint errors (intrange, octalLiteral, importShadow)

- Use range-over-integer loops (Go 1.22+) in paste parsers
- Use 0o644 octal literal style in tests
- Rename local 'paths' to 'filePaths' to avoid shadowing pkg/paths import

Assisted-By: cagent

Author: ambigois

pkg/tui/components/editor/editor.go

@@ -1444,10 +1444,10 @@ func (e *editor) SendContent() tea.Cmd {
 
 func (e *editor) handlePaste(content string) bool {
 	// First, try to parse as file paths (drag-and-drop)
-	paths := ParsePastedFiles(content)
-	if len(paths) > 0 && e.allFilesValid(paths) {
+	filePaths := ParsePastedFiles(content)
+	if len(filePaths) > 0 && e.allFilesValid(filePaths) {
 		// All paths are valid files with supported types
-		for _, path := range paths {
+		for _, path := range filePaths {
 			if err := e.AttachFile(path); err != nil {
 				slog.Warn("failed to attach dropped file", "path", path, "error", err)
 			}
@@ -1483,12 +1483,12 @@ func (e *editor) handlePaste(content string) bool {
 }
 
 // allFilesValid checks if all paths exist, are regular files (not dirs/symlinks), and have supported types.
-func (e *editor) allFilesValid(paths []string) bool {
-	if len(paths) == 0 {
+func (e *editor) allFilesValid(filePaths []string) bool {
+	if len(filePaths) == 0 {
 		return false
 	}
 
-	for _, path := range paths {
+	for _, path := range filePaths {
 		info, err := validateFilePath(path)
 		if err != nil {
 			return false

pkg/tui/components/editor/paste.go

@@ -98,7 +98,7 @@ func windowsTerminalParsePastedFiles(s string) []string {
 		inQuotes = false
 	)
 
-	for i := 0; i < len(s); i++ {
+	for i := range len(s) {
 		ch := s[i]
 
 		switch {
@@ -149,7 +149,7 @@ func unixParsePastedFiles(s string) []string {
 		escaped = false
 	)
 
-	for i := 0; i < len(s); i++ {
+	for i := range len(s) {
 		ch := s[i]
 
 		switch {

pkg/tui/components/editor/paste_test.go

@@ -423,10 +423,10 @@ func TestParsePastedFilesWithRealFiles(t *testing.T) {
 	file2 := filepath.Join(tmpDir, "test2.jpg")
 
 	// Create files
-	if err := os.WriteFile(file1, []byte("fake png"), 0644); err != nil {
+	if err := os.WriteFile(file1, []byte("fake png"), 0o644); err != nil {
 		t.Fatal(err)
 	}
-	if err := os.WriteFile(file2, []byte("fake jpg"), 0644); err != nil {
+	if err := os.WriteFile(file2, []byte("fake jpg"), 0o644); err != nil {
 		t.Fatal(err)
 	}
 
@@ -453,7 +453,7 @@ func TestValidateFilePath(t *testing.T) {
 	tmpDir := t.TempDir()
 
 	regularFile := filepath.Join(tmpDir, "regular.txt")
-	if err := os.WriteFile(regularFile, []byte("content"), 0644); err != nil {
+	if err := os.WriteFile(regularFile, []byte("content"), 0o644); err != nil {
 		t.Fatal(err)
 	}