feat: Add warning message system with red status bar notifications

gtm

@@ -164,6 +164,9 @@ class AppState:
     file_lines: List[str] = field(default_factory=list)
     added_lines: List[Tuple[int, str]] = field(default_factory=list)
     deleted_lines: List[Tuple[int, str]] = field(default_factory=list)
+    
+    # Warning message system
+    warning_message: Optional[str] = None
 
     focus: str = "left"
     divider_col: int = 40
@@ -903,8 +906,40 @@ def draw_status_bar_background(stdscr, layout: StatusBarLayout):
                 except curses.error:
                     pass
 
+def draw_warning_message(stdscr, state: AppState, layout: StatusBarLayout):
+    """Draw a warning message in red at the top of the status bar"""
+    if not state.warning_message:
+        return
+        
+    try:
+        # Initialize color pair for warning if not already done
+        if curses.has_colors():
+            try:
+                curses.init_pair(8, curses.COLOR_RED, -1)  # Red text on default background
+            except:
+                pass  # Silently fail if we can't set the color
+        
+        # Use red text with bold for warning
+        warning_attr = curses.color_pair(8) | curses.A_BOLD
+        
+        # Draw the warning message
+        warning_text = f" WARNING: {state.warning_message} "
+        stdscr.addstr(layout.main_status_y, 0, warning_text, warning_attr)
+        
+        # Add instruction to dismiss
+        dismiss_text = " (Press any key to dismiss) "
+        if len(warning_text) + len(dismiss_text) < layout.screen_width:
+            stdscr.addstr(layout.main_status_y, len(warning_text), dismiss_text, curses.A_REVERSE)
+    except curses.error:
+        pass  # Silently fail if we can't draw the warning
+
 def draw_main_status_line(stdscr, state: AppState, layout: StatusBarLayout):
     """Draw the main status line (percentages, indicators, etc.)"""
+    # If there's a warning message, draw it instead of the normal status line
+    if state.warning_message:
+        draw_warning_message(stdscr, state, layout)
+        return
+        
     visible_height = layout.start_y
     
     # Add indicators to status bar
@@ -1267,6 +1302,10 @@ def handle_mouse_input(stdscr, state: AppState) -> AppState:
         _, mx, my, _, bstate = curses.getmouse()
         state = replace(state, last_bstate=bstate, mouse_x=mx, mouse_y=my)
 
+        # If there's a warning message, any mouse click dismisses it
+        if state.warning_message:
+            return replace(state, warning_message=None)
+
         # Status bar position
         status_bar_start = state.height - state.status_bar_height
 
@@ -1376,6 +1415,10 @@ def handle_keyboard_input(key, state: AppState) -> AppState:
     if state.show_help:
         return replace(state, show_help=False)
     
+    # If there's a warning message, any key dismisses it
+    if state.warning_message:
+        return replace(state, warning_message=None)
+    
     # Handle Escape key immediately for search results
     if key == 27:  # Escape key
         # Create a new state with all escape-related changes
@@ -1547,6 +1590,10 @@ def main(stdscr, filename, show_add, show_del, mouse=True, no_diff=False, wrap_l
     if state.commits:
         state = load_commit_content(state)
     
+    # Set warning message if we had to use a terminal fallback
+    if terminal_warning:
+        state = set_warning_message(state, terminal_warning)
+    
     # Initial draw before the main loop starts
     draw_ui(stdscr, state)
 
@@ -1584,15 +1631,19 @@ def main(stdscr, filename, show_add, show_del, mouse=True, no_diff=False, wrap_l
             except Exception:
                 pass
 
+def set_warning_message(state: AppState, message: str) -> AppState:
+    """Set a warning message to be displayed in the status bar"""
+    return replace(state, warning_message=message)
+
 if __name__ == "__main__":
     # Set a fallback terminal type if the current one isn't recognized
     original_term = os.environ.get("TERM")
     if original_term in ["xterm-ghostty", "unknown"]:
-        print(f"Warning: Terminal type '{original_term}' not recognized by curses.")
-        print("Falling back to 'xterm-256color' for compatibility.")
-        print("Press Enter to continue...")
-        input()  # Wait for user to acknowledge before continuing
+        # We'll show this warning in the UI instead of console
+        terminal_warning = f"Terminal type '{original_term}' not recognized. Using 'xterm-256color'."
         os.environ["TERM"] = "xterm-256color"
+    else:
+        terminal_warning = None
     
     parser = argparse.ArgumentParser(description="A \"Git Time Machine\" for viewing file history")
     parser.add_argument("--no-diff", action="store_true", help="Don't highlight added and deleted lines")