implement embedded in-pane text editor using ratatui-textarea#2
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replace the external-editor suspend/resume approach with a live in-pane editor: pressing Enter on a text file replaces the active pane slot with an EditorPane while the other pane stays fully navigable. architecture: - PaneContent enum wraps Explorer | Box<EditorPane> so each pane slot can hold either a file listing or an open file - EditorPane wraps ratatui-textarea TextArea<'static> with load, save, and key-handling logic - DualPane gains open_editor_in_active / close_editor_in_active, active_editor / active_editor_mut accessors, handle_editor_key forwarding, left_dir / right_dir / active_dir / refresh_both helpers - map_key routes all key events through Action::EditorKeyInput when the active pane is an editor, bypassing the normal navigator mapping - Action::OpenEditor now carries the path; CloseEditor, SaveEditor, EditorKeyInput added editor key bindings: - Ctrl+S - save to disk - Ctrl+Q or Esc - close (confirm dialog if modified) - Tab - switch to other pane - Ctrl+I - insert literal tab character - all other keys handled by ratatui-textarea (arrows, undo/redo Ctrl+Z, search Ctrl+F, copy/cut/paste, emacs Ctrl+A/E/K/Y, etc.) status bar shows Ln/Col when editor is active. dependency: ratatui-textarea = "0.8" (ratatui org fork, ratatui 0.30 native, API-compatible with tui-textarea but modular sub-crate deps). all 149 tests pass. https://claude.ai/code/session_01H2u7LG4Er99DFEHw242bNU
i1rr
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i1rr
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Apr 24, 2026
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