Drop AgentView .in early-exit that skipped HITL resolutions

The incomingUsers early-exit predated the HITL resolution block from
origin/main. After the merge they coexisted, but the `continue` on
chunks with no user messages also bypassed the assistant-role HITL
resolution processing — tool calls awaiting approval/denial/output
silently stayed pending forever.

The inner loops already filter by role, so the perf optimisation wasn't
load-bearing. Remove the early-exit entirely.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: samejr

apps/webapp/app/components/runs/v3/agent/AgentView.tsx

@@ -595,11 +595,6 @@ function useAgentSessionMessages({
               : payload.message
                 ? [payload.message]
                 : [];
-            const incomingUsers = candidates.filter(
-              (m): m is UIMessage =>
-                m != null && (m as { role?: string }).role === "user" && typeof m.id === "string"
-            );
-            if (incomingUsers.length === 0) continue;
 
             let changed = false;