feat(douyu): add daily danmu report pipeline

utils/markdown_to_image.py

@@ -1,6 +1,5 @@
 import subprocess
 import time
-import markdown
 from pathlib import Path
 
 import psutil
@@ -10,8 +9,69 @@ import asyncio
 import re
 from loguru import logger
 
+try:
+    import markdown
+except ImportError:
+    markdown = None
+
 META_KEYWORDS = ["群", "群名", "时间", "日期", "成员", "消息", "统计", "总结", "来源", "生成", "记录"]
 
+def _simple_markdown_to_html(md_content: str) -> str:
+    lines = str(md_content or "").splitlines()
+    html_parts = []
+    in_ul = False
+    paragraph_lines = []
+
+    def flush_paragraph():
+        nonlocal paragraph_lines
+        if paragraph_lines:
+            text = " ".join(item.strip() for item in paragraph_lines if item.strip())
+            if text:
+                html_parts.append(f"<p>{text}</p>")
+            paragraph_lines = []
+
+    def close_ul():
+        nonlocal in_ul
+        if in_ul:
+            html_parts.append("</ul>")
+            in_ul = False
+
+    for raw_line in lines:
+        line = raw_line.rstrip()
+        stripped = line.strip()
+        if not stripped:
+            flush_paragraph()
+            close_ul()
+            continue
+        if stripped.startswith("# "):
+            flush_paragraph()
+            close_ul()
+            html_parts.append(f"<h1>{stripped[2:].strip()}</h1>")
+            continue
+        if stripped.startswith("## "):
+            flush_paragraph()
+            close_ul()
+            html_parts.append(f"<h2>{stripped[3:].strip()}</h2>")
+            continue
+        if stripped.startswith("### "):
+            flush_paragraph()
+            close_ul()
+            html_parts.append(f"<h3>{stripped[4:].strip()}</h3>")
+            continue
+        if stripped.startswith("- "):
+            flush_paragraph()
+            if not in_ul:
+                html_parts.append("<ul>")
+                in_ul = True
+            html_parts.append(f"<li>{stripped[2:].strip()}</li>")
+            continue
+        close_ul()
+        paragraph_lines.append(stripped)
+
+    flush_paragraph()
+    close_ul()
+    return "\n".join(html_parts)
+
 
 async def safe_close_browser(browser, timeout: float = 4.0) -> None:
     if not browser:
@@ -105,7 +165,10 @@ def _split_hero(html_body: str):
 
 
 async def md_str_to_html_content(md_content):
-    html_body = markdown.markdown(md_content, extensions=['extra', 'codehilite'])
+    if markdown is not None:
+        html_body = markdown.markdown(md_content, extensions=['extra', 'codehilite'])
+    else:
+        html_body = _simple_markdown_to_html(md_content)
     hero_title, hero_meta, remain_html, hero_enabled = _split_hero(html_body)
 
     css = """