Lots of updates:

1. Scrolling and click to set the cursor works.
2. GUI now uses Brass Mono as the font.
3. A lot of stability and other updates.

ROADMAP.md

@@ -1,6 +1,7 @@
 kte ROADMAP — from skeleton to a working editor
 
 Scope for “working editor” v0.1
+
 - Runs in a terminal; opens files passed on the CLI or an empty buffer.
 - Basic navigation, insert/delete, newline handling.
 - Status line and message area; shows filename, dirty flag, cursor position.
@@ -8,84 +9,101 @@ Scope for “working editor” v0.1
 - Core ke key chords: C-g (cancel), C-k s/x/q/C-q, C-l, basic arrows, Enter/Backspace, C-s (simple find).
 
 Guiding principles
+
 - Keep the core small and understandable; evolve incrementally.
 - Separate model (Buffer/Editor), control (Input/Command), and view (Renderer).
 - Favor terminal first; GUI hooks arrive later behind interfaces.
 
 ✓ Milestone 0 — Wire up a minimal app shell
+
 1. main.cpp
-   - Replace demo printing with real startup using `Editor`.
-   - Parse CLI args; open each path into a buffer (create empty if none). ✓ when `kte file1 file2` loads buffers and exits cleanly.
+    - Replace demo printing with real startup using `Editor`.
+    - Parse CLI args; open each path into a buffer (create empty if none). ✓ when `kte file1 file2` loads buffers and
+      exits cleanly.
 2. Editor integration
-   - Ensure `Editor` can open/switch/close buffers and hold status messages.
-   - Add a temporary “headless loop” to prove open/save calls work.
+    - Ensure `Editor` can open/switch/close buffers and hold status messages.
+    - Add a temporary “headless loop” to prove open/save calls work.
 
 ✓ Milestone 1 — Command model
+
 1. Command vocabulary
-   - Flesh out `Command.h/.cpp`: enums/struct for operations and data (e.g., InsertChar, MoveCursor, Save, Quit, FindNext, etc.).
-   - Provide a dispatcher entry point callable from the input layer to mutate `Editor`/`Buffer`.
-   - Definition of done: commands exist for minimal edit/navigation/save/quit; no rendering yet.
+    - Flesh out `Command.h/.cpp`: enums/struct for operations and data (e.g., InsertChar, MoveCursor, Save, Quit,
+      FindNext, etc.).
+    - Provide a dispatcher entry point callable from the input layer to mutate `Editor`/`Buffer`.
+    - Definition of done: commands exist for minimal edit/navigation/save/quit; no rendering yet.
 
 ✓ Milestone 2 — Terminal input
-1. Input interfaces
-   - Add `InputHandler.h` interface plus `TerminalInputHandler` implementation.
-   - Terminal input via ncurses (`getch`, `keypad`, non‑blocking with `nodelay`), basic key decoding (arrows, Ctrl, ESC sequences).
-2. Keymap
-   - Map ke chords to `Command` (C-k prefix handling, C-g cancel, C-l refresh, C-k s/x/q/C-q, C-s find start, text input → InsertChar).
-3. Event loop
-   - Introduce the core loop in main: read key → translate to `Command` → dispatch → trigger render.
 
-Milestone 3 — Terminal renderer
+1. Input interfaces
+    - Add `InputHandler.h` interface plus `TerminalInputHandler` implementation.
+    - Terminal input via ncurses (`getch`, `keypad`, non‑blocking with `nodelay`), basic key decoding (arrows, Ctrl, ESC
+      sequences).
+2. Keymap
+    - Map ke chords to `Command` (C-k prefix handling, C-g cancel, C-l refresh, C-k s/x/q/C-q, C-s find start, text
+      input → InsertChar).
+3. Event loop
+    - Introduce the core loop in main: read key → translate to `Command` → dispatch → trigger render.
+
+✓ Milestone 3 — Terminal renderer
+
 1. View interfaces
-   - Add `Renderer.h` with `TerminalRenderer` implementation (ncurses‑based).
+    - Add `Renderer.h` with `TerminalRenderer` implementation (ncurses‑based).
 2. Minimal draw
-   - Render viewport lines from current buffer; draw status bar (filename, dirty, row:col, message).
-   - Handle scrolling when cursor moves past edges; support window resize (SIGWINCH).
+    - Render viewport lines from current buffer; draw status bar (filename, dirty, row:col, message).
+    - Handle scrolling when cursor moves past edges; support window resize (SIGWINCH).
 3. Cursor
-   - Place terminal cursor at logical buffer location (account for tabs later; start with plain text).
+    - Place terminal cursor at logical buffer location (account for tabs later; start with plain text).
 
 Milestone 4 — Buffer fundamentals to support editing
+
 1. GapBuffer
-   - Ensure `GapBuffer` supports insert char, backspace, delete, newline, and efficient cursor moves.
+    - Ensure `GapBuffer` supports insert char, backspace, delete, newline, and efficient cursor moves.
 2. Buffer API
-   - File I/O (open/save), dirty tracking, encoding/line ending kept simple (UTF‑8, LF) for v0.1.
-   - Cursor state, mark (optional later), and viewport bookkeeping.
+    - File I/O (open/save), dirty tracking, encoding/line ending kept simple (UTF‑8, LF) for v0.1.
+    - Cursor state, mark (optional later), and viewport bookkeeping.
 3. Basic motions
-   - Left/Right/Up/Down, Home/End, PageUp/PageDown; word f/b (optional in v0.1).
+    - Left/Right/Up/Down, Home/End, PageUp/PageDown; word f/b (optional in v0.1).
 
 Milestone 5 — Core editing loop complete
+
 1. Tighten loop timing
-   - Ensure keystroke→update→render latency is reliably low; avoid unnecessary redraws.
+    - Ensure keystroke→update→render latency is reliably low; avoid unnecessary redraws.
 2. Status/messages
-   - `Editor::SetStatus()` shows transient messages; C-l forces full refresh.
+    - `Editor::SetStatus()` shows transient messages; C-l forces full refresh.
 3. Prompts
-   - Minimal prompt line for save‑as/confirm quit; blocking read in prompt mode is acceptable for v0.1.
+    - Minimal prompt line for save‑as/confirm quit; blocking read in prompt mode is acceptable for v0.1.
 
 Milestone 6 — Search (minimal)
+
 1. Incremental search (C-s)
-   - Simple forward substring search with live highlight of current match; arrow keys navigate matches while in search mode (ke‑style quirk acceptable).
-   - ESC/C-g exits search; Enter confirms and leaves cursor on match.
+    - Simple forward substring search with live highlight of current match; arrow keys navigate matches while in search
+      mode (ke‑style quirk acceptable).
+    - ESC/C-g exits search; Enter confirms and leaves cursor on match.
 
 Milestone 7 — Safety and polish for v0.1
+
 1. Safe writes
-   - Write to temp file then rename; preserve permissions where possible.
+    - Write to temp file then rename; preserve permissions where possible.
 2. Dirty/quit logic
-   - Confirm on quit when any buffer is dirty; `C-k C-q` bypasses confirmation.
+    - Confirm on quit when any buffer is dirty; `C-k C-q` bypasses confirmation.
 3. Resize/terminal quirks
-   - Handle small terminals gracefully; no crashes on narrow widths.
+    - Handle small terminals gracefully; no crashes on narrow widths.
 4. Basic tests
-   - Unit tests for `GapBuffer`, Buffer open/save round‑trip, and command mapping.
+    - Unit tests for `GapBuffer`, Buffer open/save round‑trip, and command mapping.
 
 Out of scope for v0.1 (tracked, not blocking)
+
 - Undo/redo, regex search, kill ring, word motions, tabs/render width, syntax highlighting, piece table selection, GUI.
 
 Implementation notes (files to add)
-- Input: `InputHandler.h`, `TerminalInputHandler.cpp/h` (ncurses).
-- Rendering: `Renderer.h`, `TerminalRenderer.cpp/h` (ncurses).
+
+- Input: `InputHandler.h`, `TerminalInputHandler.cc/h` (ncurses).
+- Rendering: `Renderer.h`, `TerminalRenderer.cc/h` (ncurses).
 - Prompt helpers: minimal utility for line input in raw mode.
 - Platform: small termios wrapper; SIGWINCH handler.
 
 Acceptance checklist for v0.1
+
 - Start: `./kte [files]` opens files or an empty buffer.
 - Edit: insert text, backspace, newlines; move cursor; content scrolls.
 - Save: `C-k s` writes file atomically; dirty flag clears; status shows bytes written.
@@ -94,4 +112,5 @@ Acceptance checklist for v0.1
 - Search: `C-s` finds next while typing; ESC cancels.
 
 Next concrete step
+
 - Stabilize cursor placement and scrolling logic; add resize handling and begin minimal prompt for save‑as.