diff --git a/interfaces/tui/keycodes.py b/interfaces/tui/keycodes.py
index 5793661..631ea87 100644
--- a/interfaces/tui/keycodes.py
+++ b/interfaces/tui/keycodes.py
@@ -94,6 +94,12 @@ _CSI_NAV = {
     "5~": KEY_PPAGE, "6~": KEY_NPAGE,
 }
 
+# F1-F4 bentuk huruf (kitty protocol aktif): CSI P/Q/S = F1/F2/F4.
+# F3 (huruf R) dihapus dari spec (bentrok Cursor Position Report) → pakai [13~.
+_CSI_LETTER_F = {
+    "P": KEY_F1, "Q": KEY_F2, "S": KEY_F4,
+}
+
 
 def _csi_mod(mod_str: str) -> int:
     # Modifier CSI-u: 1=default, 2=Shift, 3=Alt, 4=Shift+Alt, 5=Ctrl,
@@ -139,6 +145,11 @@ def _parse_csi(data: bytes) -> int:
             m2 = re.match(r"^\[(?:\d+;)?(\d*)([ABCDHF])$", text)
             if m2 and m2.group(2) in _CSI_NAV:
                 return _CSI_NAV[m2.group(2)]
+            # F1/F2/F4 bentuk huruf (kitty protocol aktif): \x1b[P / \x1b[Q / \x1b[S.
+            # Modifier boleh ada (misal [1;2Q = Shift+F2); kode huruf tetap jadi patokan.
+            mF = re.match(r"^\[(?:\d+;)*(\d*)([PQRS])$", text)
+            if mF and mF.group(2) in _CSI_LETTER_F:
+                return _CSI_LETTER_F[mF.group(2)]
             return KEY_ESC
         code = int(m27.group(2))
         mod = _csi_mod(m27.group(1))
@@ -214,6 +225,23 @@ def read_key(stdscr, timeout_ms: int = -1) -> int:
                 break
         return _parse_csi(bytes(seq))
 
+    if nxt == ord("O"):
+        # SS3 (application keypad): F1-F4 = \x1bOP..\x1bOS,
+        # panah = \x1bOA..\x1bOD, Home/End = \x1bOH/\x1bOF.
+        stdscr.timeout(ESC_PEEK_MS)
+        try:
+            c = stdscr.getch()
+        finally:
+            stdscr.timeout(timeout_ms)
+        ss3 = {
+            "P": KEY_F1, "Q": KEY_F2, "R": KEY_F3, "S": KEY_F4,
+            "A": KEY_UP, "B": KEY_DOWN, "C": KEY_RIGHT, "D": KEY_LEFT,
+            "H": KEY_HOME, "F": KEY_END,
+        }
+        if c != -1 and chr(c) in ss3:
+            return ss3[chr(c)]
+        return KEY_ALT("O")  # Alt+Shift+O (bukan SS3)
+
     if 32 <= nxt <= 126:
         return KEY_ALT(chr(nxt))  # Alt+<huruf> = "\x1b <huruf>"