refactor(translator): remove frontmatter extraction, translate input as-is

- Remove _extract_markmap_content() method
- Translate whatever content is provided without extraction or filtering
- Simple translation tool: input what, translate what
- Follow translation rules from prompt (preserve code blocks, links, etc.)

Author: lufftw

tools/ai-markmap-agent/src/agents/translator.py

@@ -93,14 +93,17 @@ def _load_translation_prompt(self, prompt_file: Path) -> str:
 
     def translate(self, content: str, output_type: str) -> str:
         """
-        Translate Markmap content from source to target language.
+        Translate content from source to target language.
+        
+        This is a simple translation tool: input what, translate what.
+        No content extraction or filtering is performed.
         
         Args:
-            content: Markdown content to translate
+            content: Content to translate (will be translated as-is)
             output_type: Type of output ("general" or "specialist")
             
         Returns:
-            Translated markdown content
+            Translated content
         """
         # Validate input content
         if content is None:
@@ -145,6 +148,7 @@ def translate(self, content: str, output_type: str) -> str:
             )
 
         # Build full prompt with content
+        # Translate whatever is provided (input what, translate what)
         prompt = f"""{prompt_template_str}
 
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