diff --git a/README.md b/README.md
index 5404db0..065187b 100644
--- a/README.md
+++ b/README.md
@@ -187,9 +187,9 @@ make build          # go build + vite build
 - 同步：启动时若无数据或上次超过 20h 补一次，之后每日 00:00（本地时区）全量 diff——
   源上消失即删、已存在刷新指标复活、新增入库；`proxy_syncs` 记录 added/removed/updated 与明细
   （各最多 200 个地址）；
-- 测活：每小时一轮，对距上次检测 >55min 的存活代理做**协议级握手**（SOCKS5 greeting+CONNECT /
+- 测活：每小时一轮，对距上次检测 >55min 的**全部**代理做**协议级握手**（SOCKS5 greeting+CONNECT /
   SOCKS4 / HTTP GET 转发——裸 TCP 连通不算数，防透明网关误判），并发 128、4s 超时；
-  失败标 alive=0，死记录 7 天后物理清除；
+  失败标 alive=0，拨活即复活（alive=1、fail_count 清零），死记录 7 天后物理清除；
 - 页面 `/proxies`：左栏大洲→地区分类（存活数），右侧筛选/搜索/分页列表，底部同步记录可展开变更明细；
 - `ProxySvc`：List/Regions/Stats 登录即可，Syncs/SyncNow/CheckNow 仅 admin。
 
diff --git a/backend/internal/db/queries.sql b/backend/internal/db/queries.sql
index 0fb4942..69f4185 100644
--- a/backend/internal/db/queries.sql
+++ b/backend/internal/db/queries.sql
@@ -208,7 +208,7 @@ WHERE id = ?;
 DELETE FROM proxies WHERE id = ?;
 
 -- name: ListProxiesDue :many
-SELECT id, ip, port, protocols, fail_count FROM proxies WHERE alive = 1 AND last_checked_at < ? ORDER BY last_checked_at LIMIT 20000;
+SELECT id, ip, port, protocols, fail_count FROM proxies WHERE last_checked_at < ? ORDER BY last_checked_at LIMIT 20000;
 
 -- name: MarkProxyAlive :exec
 UPDATE proxies SET last_checked_at = ?, alive = 1, fail_count = 0, last_alive_at = ?, latency = ? WHERE id = ?;
diff --git a/backend/internal/db/queries.sql.go b/backend/internal/db/queries.sql.go
index 2f8655b..9eed618 100644
--- a/backend/internal/db/queries.sql.go
+++ b/backend/internal/db/queries.sql.go
@@ -1887,7 +1887,7 @@ func (q *Queries) ListPendingPayOrders(ctx context.Context) ([]PayOrder, error)
 }
 
 const listProxiesDue = `-- name: ListProxiesDue :many
-SELECT id, ip, port, protocols, fail_count FROM proxies WHERE alive = 1 AND last_checked_at < ? ORDER BY last_checked_at LIMIT 20000
+SELECT id, ip, port, protocols, fail_count FROM proxies WHERE last_checked_at < ? ORDER BY last_checked_at LIMIT 20000
 `
 
 type ListProxiesDueRow struct {
diff --git a/backend/internal/service/proxy.go b/backend/internal/service/proxy.go
index f607709..08921b7 100644
--- a/backend/internal/service/proxy.go
+++ b/backend/internal/service/proxy.go
@@ -297,8 +297,8 @@ func runProxySync(ctx context.Context, st *store.Store) {
 		sync.Total, sync.Added, sync.Updated, sync.Removed, failed)
 }
 
-// runProxyCheck 测活一轮：取距上次检测超过阈值的存活代理，并发 TCP 拨测；
-// 连不上即标记为死（alive=0），死记录超过保留期后物理清除。
+// runProxyCheck 测活一轮：取距上次检测超过阈值的全部代理（含死记录，拨活即复活），
+// 并发协议级拨测；连不上即标记为死（alive=0），死记录超过保留期后物理清除。
 func runProxyCheck(ctx context.Context, st *store.Store) {
 	if !proxyChecking.CompareAndSwap(false, true) {
 		return
diff --git a/frontend/src/views/ProxyExtract.vue b/frontend/src/views/ProxyExtract.vue
index f1161f3..a1798e3 100644
--- a/frontend/src/views/ProxyExtract.vue
+++ b/frontend/src/views/ProxyExtract.vue
@@ -61,8 +61,10 @@ async function create() {
   }
 }
 
+const withScheme = ref(false)
+
 function extractUrl(k: proxyKeyView): string {
-  return `${location.origin}/api/v1/proxy?key=${k.key}`
+  return `${location.origin}/api/v1/proxy?key=${k.key}${withScheme.value ? '&fmt=url' : ''}`
 }
 
 async function copyUrl(k: proxyKeyView) {
@@ -100,6 +102,7 @@ function regionLabel(k: proxyKeyView): string {
   <div class="panel">
     <div class="panel-title">
       提取密钥 <span class="hint">{{ keys.length }} 个</span>
+      <span class="fmt-toggle">带协议前缀 <n-switch v-model:value="withScheme" size="small" /></span>
       <n-button size="small" type="primary" style="margin-left:auto" @click="openCreate">
         <template #icon><n-icon><AddOutline /></n-icon></template>生成密钥
       </n-button>
@@ -128,7 +131,7 @@ function regionLabel(k: proxyKeyView): string {
 
     <div class="usage panel-inset">
       <b>使用方式</b>
-      <div class="mono usage-line">GET /api/v1/proxy?key=&lt;密钥&gt;</div>
+      <div class="mono usage-line">GET /api/v1/proxy?key=&lt;密钥&gt;{{ withScheme ? '&fmt=url' : '' }}</div>
       <div class="dim">每次请求实时探活，返回一个可用的 <span class="mono">ip:port</span>（纯文本）；加 <span class="mono">&amp;fmt=url</span> 返回带协议的 <span class="mono">scheme://ip:port</span>（socks5h/http/socks4）。地区由密钥绑定，「全部地区」密钥随机返回任意国家。</div>
     </div>
 
@@ -175,6 +178,7 @@ function regionLabel(k: proxyKeyView): string {
 .key-stat { font-size: 12px; font-weight: 700; text-align: right; flex: none; min-width: 90px; }
 .mono { font-family: Consolas, monospace; }
 .dim { color: var(--cb-ink-3); font-weight: 500; }
+.fmt-toggle { display: inline-flex; align-items: center; gap: 6px; margin-left: 14px; font-size: 12px; font-weight: 700; color: var(--cb-ink-2); }
 .usage { margin-top: 16px; }
 .usage-line { margin: 8px 0 4px; font-size: 13px; }
 .panel-inset {