feat(gitea+mcp): PR 状态轮询 + poll_now agent 按钮（公网 Gitea webhook 不可达降级方案）

src-tauri/src/commands/gitea.rs

@@ -535,9 +535,85 @@ pub fn poll_all_repos() -> Result<(usize, usize), String> {
         crate::db::log_event("gitea_poll", "info",
             &format!("轮询 {polled} 个仓库，新采集 {ingested} 条 commit"), None);
     }
+
+    // PR 状态轮询：弥补公网 Gitea + 内网炼境时 webhook 不可达的场景
+    let mut pr_ingested = 0usize;
+    for (project_id, owner, repo, base_url, token) in &repos {
+        pr_ingested += poll_pr_events(&conn, project_id, owner, repo, base_url, token);
+    }
+    if pr_ingested > 0 {
+        crate::db::log_event("gitea_poll", "info",
+            &format!("PR 轮询新采集 {pr_ingested} 条事件"), None);
+    }
+
     Ok((polled, ingested))
 }
 
+/// 轮询单个仓库的 PR 状态，将未记录的事件写入 pr_events，返回新增条数
+fn poll_pr_events(
+    conn: &rusqlite::Connection,
+    project_id: &str,
+    owner: &str,
+    repo: &str,
+    base_url: &str,
+    token: &str,
+) -> usize {
+    let mut count = 0;
+    for state in ["open", "closed"] {
+        let url = format!(
+            "{base_url}/api/v1/repos/{owner}/{repo}/pulls?state={state}&limit=50&type=pullrequest"
+        );
+        let resp = match ureq::get(&url)
+            .set("Authorization", &format!("token {token}"))
+            .call()
+        {
+            Ok(r) => r,
+            Err(_) => continue,
+        };
+        let prs: serde_json::Value = match resp.into_json() {
+            Ok(j) => j,
+            Err(_) => continue,
+        };
+        let prs = match prs.as_array() {
+            Some(a) => a,
+            None => continue,
+        };
+        for pr in prs {
+            let pr_number = match pr["number"].as_i64() {
+                Some(n) => n,
+                None => continue,
+            };
+            let title       = pr["title"].as_str().unwrap_or("").to_string();
+            let head_branch = pr["head"]["ref"].as_str().unwrap_or("").to_string();
+            let base_branch = pr["base"]["ref"].as_str().unwrap_or("").to_string();
+            let author      = pr["user"]["login"].as_str().unwrap_or("").to_string();
+            let merged      = pr["merged"].as_bool().unwrap_or(false);
+            let pr_state    = pr["state"].as_str().unwrap_or("open");
+
+            // 确定动作：已合并 > 关闭 > 开启
+            let action = if merged { "merged" } else if pr_state == "closed" { "closed" } else { "opened" };
+
+            let existing: i64 = conn.query_row(
+                "SELECT COUNT(*) FROM pr_events WHERE project_id = ?1 AND pr_number = ?2 AND action = ?3",
+                params![project_id, pr_number, action],
+                |r| r.get(0),
+            ).unwrap_or(0);
+
+            if existing == 0 {
+                let id = uuid::Uuid::new_v4().to_string();
+                if conn.execute(
+                    "INSERT INTO pr_events (id, project_id, pr_number, title, action, head_branch, base_branch, author)
+                     VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8)",
+                    params![id, project_id, pr_number, title, action, head_branch, base_branch, author],
+                ).is_ok() {
+                    count += 1;
+                }
+            }
+        }
+    }
+    count
+}
+
 /// 手动触发一次轮询（UI「立即拉取」按钮）
 #[tauri::command]
 pub fn gitea_poll_now() -> Result<serde_json::Value, String> {

src-tauri/src/mcp_server.rs

@@ -540,6 +540,15 @@ fn tools_list_result() -> Value {
                     "required": ["project_id"]
                 }
             },
+            {
+                "name": "poll_now",
+                "description": "立即触发一次 Gitea 轮询：拉取所有绑定仓库的最新 commit 和 PR 状态写入飞轮。等价于炼境 UI「立即拉取」按钮。适用于公网 Gitea + 内网炼境（webhook 不可达）场景。",
+                "inputSchema": {
+                    "type": "object",
+                    "properties": {},
+                    "required": []
+                }
+            },
             {
                 "name": "setup_webhook",
                 "description": "为项目重新注册 Gitea webhook（订阅 push + pull_request 事件）。等价于炼境 UI「重设」按钮。导入新项目后、或需要更新事件订阅时调用。",
@@ -651,6 +660,10 @@ async fn tools_call(group_id: &str, params: Option<&Value>) -> Value {
             let body  = args.get("body").and_then(|v| v.as_str()).unwrap_or("");
             crate::commands::gitea::gitea_api_create_pull_request(pid, head, base, title, body)
         }
+        "poll_now" => {
+            crate::commands::gitea::poll_all_repos()
+                .map(|(polled, ingested)| format!("轮询完成：{polled} 个仓库，新 commit {ingested} 条，PR 事件已同步"))
+        }
         "setup_webhook" => {
             let pid = args.get("project_id").and_then(|v| v.as_str()).unwrap_or("");
             let port = read_port();