iOS: use operator session for ChatSheet RPCs (#19320)

Merged via /review-pr -> /prepare-pr -> /merge-pr.

Prepared head SHA: 0753b3a1a2
Co-authored-by: mbelinky <132747814+mbelinky@users.noreply.github.com>
Co-authored-by: mbelinky <132747814+mbelinky@users.noreply.github.com>
Reviewed-by: @mbelinky

CHANGELOG.md

@@ -27,6 +27,7 @@ Docs: https://docs.openclaw.ai
 - Gateway/Auth: clear stale device-auth tokens after device token mismatch errors so re-paired clients can re-auth. (#18201)
 - Voice call/Gateway: prevent overlapping closed-loop turn races with per-call turn locking, route transcript dedupe via source-aware fingerprints with strict cache eviction bounds, and harden `voicecall latency` stats for large logs without spread-operator stack overflow. (#19140) Thanks @mbelinky.
 - iOS/Onboarding: stop auth Step 3 retry-loop churn by pausing reconnect attempts on unauthorized/missing-token gateway errors and keeping auth/pairing issue state sticky during manual retry. (#19153) Thanks @mbelinky.
+- iOS/Chat: route ChatSheet RPCs through the operator session instead of the node session to avoid node-role authorization failures for `chat.history`, `chat.send`, and `sessions.list`. (#19320) Thanks @mbelinky.
 - Fix types in all tests. Typecheck the whole repository.
 - Voice-call: auto-end calls when media streams disconnect to prevent stuck active calls. (#18435) Thanks @JayMishra-source.
 - Gateway/Channels: wire `gateway.channelHealthCheckMinutes` into strict config validation, treat implicit account status as managed for health checks, and harden channel auto-restart flow (preserve restart-attempt caps across crash loops, propagate enabled/configured runtime flags, and stop pending restart backoff after manual stop). Thanks @steipete.

apps/ios/Sources/RootCanvas.swift

@@ -97,9 +97,8 @@ struct RootCanvas: View {
                     .environment(self.gatewayController)
             case .chat:
                 ChatSheet(
-                    // Mobile chat UI should use the node role RPC surface (chat.* / sessions.*)
-                    // to avoid requiring operator scopes like operator.read.
-                    gateway: self.appModel.gatewaySession,
+                    // Chat RPCs run on the operator session (read/write scopes).
+                    gateway: self.appModel.operatorSession,
                     sessionKey: self.appModel.mainSessionKey,
                     agentName: self.appModel.activeAgentName,
                     userAccent: self.appModel.seamColor)