feat: LLM 解耦 bot、RSS 外置与内容过滤

daily 自建 Cursor bridge；DAILY_LLM_PROVIDER 控制后端；config/feeds.yaml 与 sensitive_words 可配置。

Co-authored-by: Cursor <cursoragent@cursor.com>

daily/cursor_client.py

@@ -0,0 +1,33 @@
+"""Cursor SDK 调用（daily 包专用）。"""
+
+from __future__ import annotations
+
+from cursor_sdk import Agent, AgentOptions, CursorAgentError, LocalAgentOptions
+
+from daily.config import env
+from daily.cursor_bridge import cursor_cwd, warm_cursor_bridge
+
+
+def cursor_chat(system: str, user: str) -> str:
+    api_key = (env("CURSOR_API_KEY") or "").strip()
+    if not api_key:
+        return ""
+
+    warm_cursor_bridge()
+    cwd = cursor_cwd()
+    model = env("CURSOR_MODEL") or "composer-2.5"
+    prompt = f"{system}\n\n{user}"
+    try:
+        result = Agent.prompt(
+            prompt,
+            AgentOptions(
+                api_key=api_key,
+                model=model,
+                local=LocalAgentOptions(cwd=cwd),
+            ),
+        )
+    except CursorAgentError as exc:
+        raise RuntimeError(f"LLM 调用失败：{exc.message}") from exc
+    if result.status == "error":
+        raise RuntimeError(f"LLM 调用失败：{result.result or '未知错误'}")
+    return (result.result or "").strip()