feat(effects): add plugin architecture with performance monitoring

engine/layers.py

@@ -10,6 +10,8 @@ from datetime import datetime
 
 from engine import config
 from engine.effects import (
+    EffectChain,
+    EffectContext,
     fade_line,
     firehose_line,
     glitch_bar,
@@ -199,3 +201,60 @@ def render_firehose(items: list, w: int, fh: int, h: int) -> list[str]:
             fline = firehose_line(items, w)
             buf.append(f"\033[{scr_row};1H{fline}\033[K")
     return buf
+
+
+_effect_chain = None
+
+
+def init_effects() -> None:
+    """Initialize effect plugins and chain."""
+    global _effect_chain
+    from engine.effects import EffectChain, get_registry
+
+    registry = get_registry()
+
+    import effects_plugins
+
+    effects_plugins.discover_plugins()
+
+    chain = EffectChain(registry)
+    chain.set_order(["noise", "fade", "glitch", "firehose"])
+    _effect_chain = chain
+
+
+def process_effects(
+    buf: list[str],
+    w: int,
+    h: int,
+    scroll_cam: int,
+    ticker_h: int,
+    mic_excess: float,
+    grad_offset: float,
+    frame_number: int,
+    has_message: bool,
+    items: list,
+) -> list[str]:
+    """Process buffer through effect chain."""
+    if _effect_chain is None:
+        init_effects()
+
+    ctx = EffectContext(
+        terminal_width=w,
+        terminal_height=h,
+        scroll_cam=scroll_cam,
+        ticker_height=ticker_h,
+        mic_excess=mic_excess,
+        grad_offset=grad_offset,
+        frame_number=frame_number,
+        has_message=has_message,
+        items=items,
+    )
+    return _effect_chain.process(buf, ctx)
+
+
+def get_effect_chain() -> EffectChain | None:
+    """Get the effect chain instance."""
+    global _effect_chain
+    if _effect_chain is None:
+        init_effects()
+    return _effect_chain