feat: 添加自然语言触发支持

- 支持'保存到知识库'/'订阅到知识库'触发词
- 自动检测链接并处理
- 更新SKILL.md文档

skills/kb-workflow/kb_handler.py

@@ -4,6 +4,10 @@ Auto-trigger handler for obsidian-kb skill.
 
 Detects video/article links in user messages and automatically processes them.
 Supports Bilibili, YouTube, and Zhihu.
+
+## 触发词
+- "保存到知识库" + 链接 → 添加到收件箱并处理
+- "订阅到知识库" + 链接 → 添加订阅
 """
 
 import re
@@ -41,6 +45,12 @@ PATTERNS = {
     'zhihu_answer': re.compile(r'https?://(?:www\.)?zhihu\.com/question/\d+/answer/(\d+)'),
 }
 
+# 触发词模式
+TRIGGER_PATTERNS = {
+    'save': re.compile(r'(保存到知识库|加入知识库|添加到知识库)', re.IGNORECASE),
+    'subscribe': re.compile(r'(订阅到知识库|订阅知识库|关注到知识库)', re.IGNORECASE),
+}
+
 
 def detect_links(text: str) -> List[Dict[str, str]]:
     """
@@ -196,6 +206,96 @@ def get_action_prompt(detected: List[Dict[str, str]]) -> str:
         return f"是否将上述 {count} 个内容添加到收件箱？(y/n)"
 
 
+def detect_triggers(text: str) -> Optional[str]:
+    """
+    检测用户消息中的触发词。
+
+    Args:
+        text: 用户消息
+
+    Returns:
+        'save' | 'subscribe' | None
+    """
+    # 检测"保存到知识库"
+    if TRIGGER_PATTERNS['save'].search(text):
+        return 'save'
+
+    # 检测"订阅到知识库"
+    if TRIGGER_PATTERNS['subscribe'].search(text):
+        return 'subscribe'
+
+    return None
+
+
+def handle_save_to_kb(detected: List[Dict[str, str]]) -> str:
+    """
+    处理"保存到知识库"命令：将链接添加到收件箱并处理。
+
+    Args:
+        detected: 检测到的链接列表
+
+    Returns:
+        处理结果消息
+    """
+    if not detected:
+        return "❌ 未检测到任何链接，请提供要保存的链接"
+
+    results = []
+    for item in detected:
+        if item['is_short']:
+            results.append(f"⚠️  短链接无法处理: {item['url']}")
+            continue
+
+        # 调用保存处理
+        success, msg = process_link(item['url'], item['platform'], auto_process=True)
+        results.append(msg)
+
+    return "\n".join(results)
+
+
+def handle_subscribe_to_kb(detected: List[Dict[str, str]]) -> str:
+    """
+    处理"订阅到知识库"命令：将链接添加到订阅列表。
+
+    Args:
+        detected: 检测到的链接列表
+
+    Returns:
+        处理结果消息
+    """
+    if not detected:
+        return "❌ 未检测到任何链接，请提供要订阅的链接"
+
+    results = []
+    for item in detected:
+        if item['platform'] != 'bilibili':
+            results.append(f"⚠️  暂不支持订阅 {item['platform']}: {item['url']}")
+            continue
+
+        if item['is_short']:
+            results.append(f"⚠️  短链接无法订阅: {item['url']}")
+            continue
+
+        try:
+            # 调用订阅命令
+            import subprocess
+            cmd = [
+                sys.executable,
+                os.path.join(os.path.dirname(__file__), 'kb_workflow.py'),
+                '--trigger', 'subscriptions',
+                '--add', 'bilibili', 'video', item['id'], item.get('url', '')
+            ]
+            result = subprocess.run(cmd, capture_output=True, text=True)
+            if result.returncode == 0:
+                results.append(f"✅ 已订阅: {item['id']}")
+            else:
+                results.append(f"❌ 订阅失败: {result.stderr}")
+        except Exception as e:
+            results.append(f"❌ 订阅失败: {e}")
+
+    return "\n".join(results)
+
+
 def should_auto_process(text: str) -> bool:
     """
     Check if user wants to auto-process based on their message.
@@ -326,21 +426,45 @@ def handle_message(text: str) -> Optional[str]:
     """
     Main entry point: handle incoming message and return response.
 
+    ## 触发条件
+    - 检测到"保存到知识库"/"订阅到知识库"触发词 + 链接 → 自动处理
+    - 仅检测到链接 → 询问用户是否处理
+
     Args:
         text: User's message text
 
     Returns:
         Response message, or None if no action needed
     """
-    # First, check for short links and provide help
-    has_short, short_msg = detect_and_format(text)
+    # 首先检测触发词
+    trigger = detect_triggers(text)
 
-    # Detect all links (including short ones)
+    # 检测链接
     detected = detect_links(text)
 
-    if not detected:
+    # 如果没有链接，也没有触发词，返回 None
+    if not detected and not trigger:
         return None
 
+    # 如果有触发词（save/subscribe），但没有链接
+    if trigger and not detected:
+        if trigger == 'save':
+            return "请提供要保存到知识库的链接"
+        elif trigger == 'subscribe':
+            return "请提供要订阅到知识库的链接"
+
+    # 处理"保存到知识库"触发
+    if trigger == 'save':
+        return handle_save_to_kb(detected)
+
+    # 处理"订阅到知识库"触发
+    if trigger == 'subscribe':
+        return handle_subscribe_to_kb(detected)
+
+    # 以下是原有的仅链接检测逻辑
+    # First, check for short links and provide help
+    has_short, short_msg = detect_and_format(text)
+
     # If we have short links, show help message first
     if has_short:
         return short_msg