Fix writer max_tokens (500→1000) for titles/tags, fix preview scrollbar height

scripts/writer.py

@@ -246,7 +246,7 @@ class Writer:
         if HAVE_LLM:
             prompt = tag_prompts.get(platform, f"根据文章信息生成适合{platform}的标签。标题：{title} 领域：{field} 核心观点：{core} 直接输出标签，空格分隔。")
             try:
-                tags_text = call_llm(prompt, temperature=0.2, max_tokens=500)
+                tags_text = call_llm(prompt, temperature=0.2, max_tokens=1000)
                 if tags_text:
                     tags = [t.strip('#') for t in tags_text.strip().split() if t.strip('#')]
                     if tags:
@@ -342,7 +342,7 @@ class Writer:
 
         prompt = title_templates.get(platform, f"给以下文章改个吸引人的{platform}标题：{original}")
         try:
-            resp = call_llm(prompt, temperature=0.7, max_tokens=500)
+            resp = call_llm(prompt, temperature=0.7, max_tokens=1000)
             titles = []
             for line in resp.strip().split('\n'):
                 line = line.strip()