fix(mac): adopt canonical session key and add reset triggers (#10898)

Add shared native chat handling for /new, /reset, and /clear.

This also aligns main session key handling in the shared chat UI and includes follow-up test and CI fixes needed to keep the branch mergeable.

Co-authored-by: Nachx639 <71144023+Nachx639@users.noreply.github.com>
Co-authored-by: Luke <92253590+ImLukeF@users.noreply.github.com>

apps/macos/Sources/OpenClaw/WebChatSwiftUI.swift

@@ -59,7 +59,23 @@ struct MacGatewayChatTransport: OpenClawChatTransport {
             method: "sessions.list",
             params: params,
             timeoutMs: 15000)
-        return try JSONDecoder().decode(OpenClawChatSessionsListResponse.self, from: data)
+        let decoded = try JSONDecoder().decode(OpenClawChatSessionsListResponse.self, from: data)
+        let mainSessionKey = await GatewayConnection.shared.cachedMainSessionKey()
+        let defaults = decoded.defaults.map {
+            OpenClawChatSessionsDefaults(
+                model: $0.model,
+                contextTokens: $0.contextTokens,
+                mainSessionKey: mainSessionKey)
+        } ?? OpenClawChatSessionsDefaults(
+            model: nil,
+            contextTokens: nil,
+            mainSessionKey: mainSessionKey)
+        return OpenClawChatSessionsListResponse(
+            ts: decoded.ts,
+            path: decoded.path,
+            count: decoded.count,
+            defaults: defaults,
+            sessions: decoded.sessions)
     }
 
     func setSessionModel(sessionKey: String, model: String?) async throws {
@@ -103,6 +119,13 @@ struct MacGatewayChatTransport: OpenClawChatTransport {
         try await GatewayConnection.shared.healthOK(timeoutMs: timeoutMs)
     }
 
+    func resetSession(sessionKey: String) async throws {
+        _ = try await GatewayConnection.shared.request(
+            method: "sessions.reset",
+            params: ["key": AnyCodable(sessionKey)],
+            timeoutMs: 10000)
+    }
+
     func events() -> AsyncStream<OpenClawChatTransportEvent> {
         AsyncStream { continuation in
             let task = Task {