fix(oauth): refresh Cline tokens with extension JSON contract

open-sse/services/tokenRefresh/providers.js

@@ -147,6 +147,53 @@ export async function refreshKimiToken(refreshToken, credentials, log) {
   return refreshAccessToken("kimi", refreshToken, credentials, log);
 }
 
+export async function refreshClineToken(refreshToken, log) {
+  if (!refreshToken) return null;
+
+  return dedupRefresh("cline", refreshToken, async () => {
+    try {
+      const response = await fetch(PROVIDERS.cline?.refreshUrl, {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+          Accept: "application/json",
+        },
+        body: JSON.stringify({
+          refreshToken,
+          grantType: "refresh_token",
+          clientType: "extension",
+        }),
+      });
+
+      if (!response.ok) {
+        const errorText = await response.text();
+        log?.error?.("TOKEN_REFRESH", "Failed to refresh Cline token", {
+          status: response.status,
+          error: errorText,
+        });
+        return null;
+      }
+
+      const body = await response.json();
+      const tokens = body?.data || body;
+      if (!tokens?.accessToken) return null;
+
+      const expiresIn = tokens.expiresAt
+        ? Math.max(1, Math.floor((new Date(tokens.expiresAt).getTime() - Date.now()) / 1000))
+        : (tokens.expiresIn || tokens.expires_in || 3600);
+
+      return {
+        accessToken: tokens.accessToken,
+        refreshToken: tokens.refreshToken || refreshToken,
+        expiresIn,
+      };
+    } catch (error) {
+      log?.error?.("TOKEN_REFRESH", `Error refreshing Cline token: ${error.message}`);
+      return null;
+    }
+  }, log);
+}
+
 // Claude OAuth: JSON body, client_id only. Delegate to refreshAccessToken("claude", ...).
 export async function refreshClaudeOAuthToken(refreshToken, log) {
   return refreshAccessToken("claude", refreshToken, {}, log);