refactor(openclaw): reuse shared gateway url validation

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/openclaw/dispatcher.ts

@@ -1,30 +1,11 @@
 import { spawn } from "bun"
+import { validateGatewayUrl } from "./config"
 import type { OpenClawGateway, WakeResult } from "./types"
 
 const DEFAULT_HTTP_TIMEOUT_MS = 10_000
 const DEFAULT_COMMAND_TIMEOUT_MS = 5_000
 const MIN_COMMAND_TIMEOUT_MS = 100
 const MAX_COMMAND_TIMEOUT_MS = 300_000
-const SHELL_METACHAR_RE = /[|&;><`$()]/
-
-export function validateGatewayUrl(url: string): boolean {
-  try {
-    const parsed = new URL(url)
-    if (parsed.protocol === "https:") return true
-    if (
-      parsed.protocol === "http:" &&
-      (parsed.hostname === "localhost" ||
-        parsed.hostname === "127.0.0.1" ||
-        parsed.hostname === "::1" ||
-        parsed.hostname === "[::1]")
-    ) {
-      return true
-    }
-    return false
-  } catch {
-    return false
-  }
-}
 
 export function interpolateInstruction(
   template: string,