Add REPL effect detection and input handling to pipeline runner

- Detect REPL effect in pipeline and enable interactive mode
- Enable raw terminal mode for REPL input capture
- Add keyboard input loop for REPL commands (return, up/down arrows, backspace)
- Process commands and handle pipeline mutations from REPL
- Fix lint issues in graph and REPL modules (type annotations, imports)

engine/pipeline/hybrid_config.py

@@ -18,8 +18,8 @@ providing the same flexibility.
 """
 
 from dataclasses import dataclass, field
-from typing import Any, Dict, List, Optional
 from pathlib import Path
+from typing import Any
 
 from engine.pipeline.graph import Graph, NodeType
 from engine.pipeline.graph_adapter import graph_to_pipeline
@@ -32,7 +32,7 @@ class EffectConfig:
     name: str
     intensity: float = 1.0
     enabled: bool = True
-    params: Dict[str, Any] = field(default_factory=dict)
+    params: dict[str, Any] = field(default_factory=dict)
 
 
 @dataclass
@@ -70,9 +70,9 @@ class PipelineConfig:
     """
 
     source: str = "headlines"
-    camera: Optional[CameraConfig] = None
-    effects: List[EffectConfig] = field(default_factory=list)
-    display: Optional[DisplayConfig] = None
+    camera: CameraConfig | None = None
+    effects: list[EffectConfig] = field(default_factory=list)
+    display: DisplayConfig | None = None
     viewport_width: int = 80
     viewport_height: int = 24
 
@@ -208,7 +208,7 @@ def load_hybrid_config(toml_path: str | Path) -> PipelineConfig:
     return parse_hybrid_config(data)
 
 
-def parse_hybrid_config(data: Dict[str, Any]) -> PipelineConfig:
+def parse_hybrid_config(data: dict[str, Any]) -> PipelineConfig:
     """Parse hybrid configuration from dictionary.
 
     Expected format: