fix: harden plugin docker e2e

docs/tools/plugin.md

@@ -124,7 +124,9 @@ Looking for third-party plugins? See [Community Plugins](/plugins/community).
 | `slots`          | Exclusive slot selectors (e.g. `memory`, `contextEngine`) |
 | `entries.\<id\>` | Per-plugin toggles + config                               |
 
-Config changes **require a gateway restart**.
+Config changes **require a gateway restart**. If the Gateway is running with config
+watch + in-process restart enabled (the default `openclaw gateway` path), that
+restart is usually performed automatically a moment after the config write lands.
 
 <Accordion title="Plugin states: disabled vs missing vs invalid">
   - **Disabled**: plugin exists but enablement rules turned it off. Config is preserved.

docs/tools/slash-commands.md

@@ -96,6 +96,8 @@ Text + native (when enabled):
 - `/config show|get|set|unset` (persist config to disk, owner-only; requires `commands.config: true`)
 - `/mcp show|get|set|unset` (manage OpenClaw MCP server config, owner-only; requires `commands.mcp: true`)
 - `/plugins list|show|get|enable|disable` (inspect discovered plugins and toggle enablement, owner-only for writes; requires `commands.plugins: true`)
+  - `/plugin` is an alias for `/plugins`.
+  - Enable/disable writes still reply with a restart hint. On a watched foreground gateway, OpenClaw may perform that restart automatically right after the write.
 - `/debug show|set|unset|reset` (runtime overrides, owner-only; requires `commands.debug: true`)
 - `/usage off|tokens|full|cost` (per-response usage footer or local cost summary)
 - `/tts off|always|inbound|tagged|status|provider|limit|summary|audio` (control TTS; see [/tts](/tools/tts))