feat(display): add configurable multi-backend display system

engine/config.py

@@ -127,6 +127,7 @@ class Config:
 
     script_fonts: dict[str, str] = field(default_factory=_get_platform_font_paths)
 
+    display: str = "terminal"
     websocket: bool = False
     websocket_port: int = 8765
 
@@ -167,6 +168,7 @@ class Config:
             glitch_glyphs="░▒▓█▌▐╌╍╎╏┃┆┇┊┋",
             kata_glyphs="ﾊﾐﾋｰｳｼﾅﾓﾆｻﾜﾂｵﾘｱﾎﾃﾏｹﾒｴｶｷﾑﾕﾗｾﾈｽﾀﾇﾍ",
             script_fonts=_get_platform_font_paths(),
+            display=_arg_value("--display", argv) or "terminal",
             websocket="--websocket" in argv,
             websocket_port=_arg_int("--websocket-port", 8765, argv),
         )
@@ -229,6 +231,7 @@ GLITCH = "░▒▓█▌▐╌╍╎╏┃┆┇┊┋"
 KATA = "ﾊﾐﾋｰｳｼﾅﾓﾆｻﾜﾂｵﾘｱﾎﾃﾏｹﾒｴｶｷﾑﾕﾗｾﾈｽﾀﾇﾍ"
 
 # ─── WEBSOCKET ─────────────────────────────────────────────
+DISPLAY = _arg_value("--display", sys.argv) or "terminal"
 WEBSOCKET = "--websocket" in sys.argv
 WEBSOCKET_PORT = _arg_int("--websocket-port", 8765)