Update bypass action behavior for auto redirect

docs/configuration/shared/pre-match.md

@@ -24,10 +24,14 @@ When a rule matches an action that requires an established connection, pre-match
 
 Reject with TCP RST / ICMP unreachable.
 
+See [reject](/configuration/route/rule_action/#reject) for details.
+
 #### route
 
 Route ICMP connections to the specified outbound for direct reply.
 
+See [route](/configuration/route/rule_action/#route) for details.
+
 #### bypass
 
 !!! question "Since sing-box 1.13.0"
@@ -37,3 +41,10 @@ Route ICMP connections to the specified outbound for direct reply.
     Only supported on Linux with `auto_redirect` enabled.
 
 Bypass sing-box and connect directly at kernel level.
+
+If `outbound` is not specified, the rule only matches in pre-match from auto redirect,
+and will be skipped in other contexts.
+
+For all other contexts, bypass with `outbound` behaves like `route` action.
+
+See [bypass](/configuration/route/rule_action/#bypass) for details.

docs/configuration/shared/pre-match.zh.md

@@ -22,10 +22,14 @@ icon: material/new-box
 
 以 TCP RST / ICMP 不可达拒绝。
 
+详情参阅 [reject](/configuration/route/rule_action/#reject)。
+
 #### route
 
 将 ICMP 连接路由到指定出站以直接回复。
 
+详情参阅 [route](/configuration/route/rule_action/#route)。
+
 #### bypass
 
 !!! question "自 sing-box 1.13.0 起"
@@ -35,3 +39,9 @@ icon: material/new-box
     仅支持 Linux，且需要启用 `auto_redirect`。
 
 在内核层面绕过 sing-box 直接连接。
+
+如果未指定 `outbound`，规则仅在来自 auto redirect 的预匹配中匹配，在其他场景中将被跳过。
+
+对于其他所有场景，指定了 `outbound` 的 bypass 行为与 `route` 相同。
+
+详情参阅 [bypass](/configuration/route/rule_action/#bypass)。