fix: address PR review feedback

- print_support.mm: use initWithBytes:length:encoding: to avoid
  truncation at embedded NUL bytes in document text
- print_support.mm: size print view from NSPrintInfo imageablePageBounds
  instead of hardcoded US Letter dimensions
- scintilla_config.mm: clarify BGR byte order comment on caret color
- wndproc.mm: fix indentation alignment on IDM_FILE_PRINT case

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Brian Tabone

macos/platform/print_support.mm

@@ -19,7 +19,9 @@ void showPrintDialog(NSWindow* parentWindow)
 
 	std::vector<char> buf(len + 1, 0);
 	ScintillaBridge_sendMessage(sci, SCI_GETTEXT, len + 1, reinterpret_cast<intptr_t>(buf.data()));
-	NSString* text = [NSString stringWithUTF8String:buf.data()];
+	NSString* text = [[NSString alloc] initWithBytes:buf.data()
+	                                          length:static_cast<NSUInteger>(len)
+	                                        encoding:NSUTF8StringEncoding];
 	if (!text || text.length == 0) return;
 
 	// Use the editor's current font
@@ -28,12 +30,14 @@ void showPrintDialog(NSWindow* parentWindow)
 	if (!font)
 		font = [NSFont monospacedSystemFontOfSize:ctx().fontSize weight:NSFontWeightRegular];
 
-	// Create an NSTextView for built-in print pagination
-	NSTextView* printView = [[NSTextView alloc] initWithFrame:NSMakeRect(0, 0, 612, 792)];
+	// Size the print view from the printable area to match selected paper/margins
+	NSPrintInfo* printInfo = [NSPrintInfo sharedPrintInfo];
+	NSRect printableRect = [printInfo imageablePageBounds];
+	NSTextView* printView = [[NSTextView alloc] initWithFrame:printableRect];
 	[printView setFont:font];
 	[printView setString:text];
 
-	NSPrintOperation* op = [NSPrintOperation printOperationWithView:printView];
+	NSPrintOperation* op = [NSPrintOperation printOperationWithView:printView printInfo:printInfo];
 	[op setShowsPrintPanel:YES];
 	[op setShowsProgressPanel:YES];
 

macos/platform/scintilla_config.mm

@@ -53,8 +53,8 @@ void configureScintilla(void* sci)
 	ScintillaBridge_sendMessage(sci, SCI_SETMULTIPASTE, SC_MULTIPASTE_EACH, 0);
 	ScintillaBridge_sendMessage(sci, SCI_SETADDITIONALCARETSVISIBLE, 1, 0);
 
-	// Multi-cursor visual styling (BGR colors)
-	ScintillaBridge_sendMessage(sci, SCI_SETADDITIONALCARETFORE, 0xCC0000, 0);  // dark blue caret
+	// Multi-cursor visual styling (Scintilla uses BGR byte order)
+	ScintillaBridge_sendMessage(sci, SCI_SETADDITIONALCARETFORE, 0xCC0000, 0);  // BGR 0xCC0000 = blue
 	ScintillaBridge_sendMessage(sci, SCI_SETADDITIONALSELALPHA, 80, 0);  // semi-transparent selections
 
 	// Whitespace / EOL / indent guide visibility

macos/platform/wndproc.mm

@@ -99,10 +99,10 @@ LRESULT CALLBACK MainWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 					return 0;
 
 				case IDM_FILE_PRINT:
-				showPrintDialog(ctx().mainWindow);
-				return 0;
+					showPrintDialog(ctx().mainWindow);
+					return 0;
 
-			case IDM_FILE_REVEAL_FINDER:
+				case IDM_FILE_REVEAL_FINDER:
 					doRevealInFinder();
 					return 0;
 				case IDM_FILE_COPY_FULL_PATH: