feat(ai-markmap-agent): simplify writer prompt, fix resume, debug output and template errors

Writer prompt simplification:
- Remove URL format instructions from writer_behavior.md
- Compress problem data to ID list only (reduces tokens)
- Add _convert_plain_leetcode_to_links() to post_processing.py
- Fix template placeholders ({id}, {title}, {slug}) causing KeyError

Resume functionality fixes:
- Fix load_expert_responses_from_run to scan correct file categories
- Add parse_suggestions_from_response() and parse_adoption_list_from_response()
- Fix run_expert_review/run_full_discussion resume to load data into state

Debug output fixes:
- Add save_expert_review() for Phase 1 outputs (01_ prefix)
- Add save_discussion() for Phase 2 outputs (02_ prefix)
- Update graph.py to use new debug save methods

Author: lufftw

tools/ai-markmap-agent/prompts/writer/writer_behavior.md

@@ -45,13 +45,13 @@ For context, here are the full descriptions and rationales:
 ### Link Format Rules
 
 **For problems in the list above:**
-- Write ONLY: `LeetCode {id} - {title}` (NO URL needed)
+- Write ONLY: `LeetCode NUMBER - TITLE` (NO URL needed)
 - Links will be generated automatically in post-processing
 - If baseline has URLs for these problems, REMOVE them
 - Example: `LeetCode 11 - Container With Most Water`
 
 **For problems NOT in the list:**
-- Include the LeetCode link: `[LeetCode {id} - {title}](https://leetcode.com/problems/{slug}/description/)`
+- Include the LeetCode link: `[LeetCode NUMBER - TITLE](https://leetcode.com/problems/SLUG/description/)`
 - Example: `[LeetCode 999 - Some Problem](https://leetcode.com/problems/some-problem/description/)`
 
 **Important:**
@@ -95,8 +95,8 @@ For context, here are the full descriptions and rationales:
 
 ### Problem References
 - Use full "LeetCode" not "LC"
-- For problems in our list: `LeetCode {id} - {title}` (no URL)
-- For other problems: `[LeetCode {id} - {title}](leetcode_url)`
+- For problems in our list: `LeetCode NUMBER - TITLE` (no URL)
+- For other problems: `[LeetCode NUMBER - TITLE](leetcode_url)`
 - Do NOT add GitHub solution links
 
 ### Markmap Features