feat(tui): add syntax highlighting for tool renderers (#195)

Add Pygments-based syntax highlighting with native hacker theme:
- Python renderer: Python code highlighting
- Browser renderer: JavaScript code highlighting
- Terminal renderer: Bash command highlighting
- File edit renderer: Auto-detect language from file extension, diff-style display

strix/interface/tool_components/python_renderer.py

@@ -1,16 +1,53 @@
+from functools import cache
 from typing import Any, ClassVar
 
+from pygments.lexers import PythonLexer
+from pygments.styles import get_style_by_name
 from textual.widgets import Static
 
 from .base_renderer import BaseToolRenderer
 from .registry import register_tool_renderer
 
 
+@cache
+def _get_style_colors() -> dict[Any, str]:
+    style = get_style_by_name("native")
+    return {token: f"#{style_def['color']}" for token, style_def in style if style_def["color"]}
+
+
 @register_tool_renderer
 class PythonRenderer(BaseToolRenderer):
     tool_name: ClassVar[str] = "python_action"
     css_classes: ClassVar[list[str]] = ["tool-call", "python-tool"]
 
+    @classmethod
+    def _get_token_color(cls, token_type: Any) -> str | None:
+        colors = _get_style_colors()
+        while token_type:
+            if token_type in colors:
+                return colors[token_type]
+            token_type = token_type.parent
+        return None
+
+    @classmethod
+    def _highlight_python(cls, code: str) -> str:
+        lexer = PythonLexer()
+        result_parts: list[str] = []
+
+        for token_type, token_value in lexer.get_tokens(code):
+            if not token_value:
+                continue
+
+            escaped_value = cls.escape_markup(token_value)
+            color = cls._get_token_color(token_type)
+
+            if color:
+                result_parts.append(f"[{color}]{escaped_value}[/]")
+            else:
+                result_parts.append(escaped_value)
+
+        return "".join(result_parts)
+
     @classmethod
     def render(cls, tool_data: dict[str, Any]) -> Static:
         args = tool_data.get("args", {})
@@ -21,8 +58,9 @@ class PythonRenderer(BaseToolRenderer):
         header = "</> [bold #3b82f6]Python[/]"
 
         if code and action in ["new_session", "execute"]:
-            code_display = code[:600] + "..." if len(code) > 600 else code
-            content_text = f"{header}\n  [italic white]{cls.escape_markup(code_display)}[/]"
+            code_display = code[:2000] + "..." if len(code) > 2000 else code
+            highlighted_code = cls._highlight_python(code_display)
+            content_text = f"{header}\n{highlighted_code}"
         elif action == "close":
             content_text = f"{header}\n  [dim]Closing session...[/]"
         elif action == "list_sessions":