fix(ios): harden gateway pairing setup

Harden iOS gateway setup-code pairing by rejecting non-loopback plaintext ws:// setup URLs before bootstrap token issuance, consolidating iOS setup parsing, and adding QR scan support from Settings.

Verification:
- pnpm test extensions/device-pair/index.test.ts
- swift test --package-path apps/shared/OpenClawKit --filter DeepLinksSecurityTests
- XcodeBuildMCP OpenClawLogicTests/DeepLinkParserTests
- targeted SwiftLint for touched iOS/OpenClawKit files
- pnpm exec oxfmt --check --threads=1 extensions/device-pair/index.ts extensions/device-pair/index.test.ts
- git diff --check origin/main...HEAD
- GitHub PR checks green on 58e5e60a5c

apps/ios/Tests/DeepLinkParserTests.swift

@@ -161,4 +161,34 @@ private func agentAction(
             token: nil,
             password: nil))
     }
+
+    @Test func parseGatewaySetupInputParsesFullCopiedSetupMessage() {
+        let payload = #"{"url":"wss://gateway.example.com","bootstrapToken":"tok"}"#
+        let link = GatewayConnectDeepLink.fromSetupInput("""
+        Pairing setup code generated.
+
+        Setup code:
+        \(setupCode(from: payload))
+        """)
+
+        #expect(link == .init(
+            host: "gateway.example.com",
+            port: 443,
+            tls: true,
+            bootstrapToken: "tok",
+            token: nil,
+            password: nil))
+    }
+
+    @Test func parseGatewaySetupInputParsesRawGatewayURL() {
+        let link = GatewayConnectDeepLink.fromSetupInput("wss://gateway.example.com:444")
+
+        #expect(link == .init(
+            host: "gateway.example.com",
+            port: 444,
+            tls: true,
+            bootstrapToken: nil,
+            token: nil,
+            password: nil))
+    }
 }