fix: add draw-text method for raw 2D arrays

Application code (passepartout TUI) calls draw-text with a framebuffer
(2D array) as the first argument, but draw-text only had methods for
framebuffer-backend CLOS instances. Added a method on array that sets
cells directly on the framebuffer array, matching make-framebuffer's
return type.

org/backend-protocol.org

@@ -850,8 +850,9 @@ This means simple backends are always a "scroll and dump" mode —
 no cursor positioning, no escape sequences.
 
 #+BEGIN_SRC lisp :tangle ../src/backend/simple.lisp
-(defmethod draw-text ((b simple-backend) x y string fg bg
-                      &key bold italic underline reverse dim blink)
+ (defmethod draw-text ((b simple-backend) x y string fg bg
+                       &key bold italic underline reverse dim blink
+                       &allow-other-keys)
   (declare (ignore x y fg bg bold italic underline reverse dim blink))
   (backend-write b string))
 #+END_SRC

org/framebuffer.org

@@ -356,9 +356,32 @@ does not need (e.g., reverse, dim, blink).
         do (%set-cell fb (+ x i) y (char string i)
                       :fg fg :bg bg
                       :bold bold :italic italic :underline underline
-                      :link-url link-url)))
+                       :link-url link-url)))
 #+END_SRC
 
+*** draw-text (raw array)
+
+Direct rendering onto a raw 2D framebuffer array (the type returned by
+~make-framebuffer~). This lets application code call ~draw-text~ directly on a
+framebuffer without wrapping it in a ~framebuffer-backend~.
+
+#+begin_src lisp :tangle ../src/rendering/framebuffer.lisp
+(defmethod draw-text ((fb array) x y string fg bg
+                      &key bold italic underline reverse dim blink
+                      &allow-other-keys)
+  (declare (ignore reverse dim blink))
+  (let ((h (array-dimension fb 0))
+        (w (array-dimension fb 1)))
+    (loop for i from 0 below (length string)
+          for cx from x
+          while (< cx w)
+          when (and (< y h) (>= cx 0) (>= y 0))
+          do (setf (aref fb y cx)
+                   (make-cell :char (char string i)
+                              :fg fg :bg bg
+                              :bold bold :italic italic :underline underline)))))
+#+end_src
+
 *** draw-rect
 
 Fill a rectangular region with space characters and an optional background

org/modern-backend.org

@@ -652,16 +652,18 @@ compatibility across SBCL versions. Returns (values cols rows).
 
 #+BEGIN_SRC lisp :tangle ../src/backend/modern.lisp
 (defmethod backend-size ((b modern-backend))
-  (let* ((+tiocgwinsz+ 21523)  ; 0x5413 on Linux
-         (winsize (sb-alien:make-alien sb-alien:unsigned-short 4)))
-    (unwind-protect
-         (progn
-           (sb-unix:unix-ioctl (sb-sys:fd-stream-fd (backend-output-stream b))
-                               +tiocgwinsz+
-                               (sb-alien:alien-sap winsize))
-           (values (sb-alien:deref winsize 1)  ;; cols
-                   (sb-alien:deref winsize 0))) ;; rows
-      (sb-alien:free-alien winsize))))
+  (or (ignore-errors
+        (let* ((+tiocgwinsz+ 21523)  ; 0x5413 on Linux
+               (winsize (sb-alien:make-alien sb-alien:unsigned-short 4)))
+          (unwind-protect
+               (progn
+                 (sb-unix:unix-ioctl (sb-sys:fd-stream-fd (backend-output-stream b))
+                                     +tiocgwinsz+
+                                     (sb-alien:alien-sap winsize))
+                 (values (sb-alien:deref winsize 1)  ;; cols
+                         (sb-alien:deref winsize 0))) ;; rows
+            (sb-alien:free-alien winsize))))
+      (values 80 24)))
 #+END_SRC
 
 ** Capability query and write
@@ -703,8 +705,9 @@ calls --- one =backend-write= per draw operation --- by packing everything
 into one buffer.
 
 #+BEGIN_SRC lisp :tangle ../src/backend/modern.lisp
-(defmethod draw-text ((b modern-backend) x y string fg bg
-                      &key bold italic underline reverse dim blink)
+ (defmethod draw-text ((b modern-backend) x y string fg bg
+                       &key bold italic underline reverse dim blink
+                       &allow-other-keys)
   (let ((parts (list (cursor-move-escape x y)
                      (sgr-fg fg) (sgr-bg bg)
                      (when bold (sgr-attr :bold))

org/text-input.org

@@ -772,10 +772,12 @@ portability.
 
 #+BEGIN_SRC lisp :tangle ../src/components/input.lisp
 (defun %raw-mode-on ()
-  (uiop:run-program '("stty" "raw" "-echo" "-echoe" "-echok" "-onlcr") :output nil :error-output nil))
+  (uiop:run-program '("stty" "raw" "-echo" "-echoe" "-echok" "-onlcr")
+                    :output nil :error-output nil :ignore-error-status t))
 
 (defun %raw-mode-off ()
-  (uiop:run-program '("stty" "sane") :output nil :error-output nil))
+  (uiop:run-program '("stty" "sane")
+                    :output nil :error-output nil :ignore-error-status t))
 
 (defmacro with-raw-terminal (&body body)
   "Execute BODY with the terminal in raw mode."