fix: Request changes uses in-app confirmation, requires review comments

- Replace window.prompt with in-app dropdown confirmation (matches merge dialog pattern)
- Disable button when no unresolved comments exist (comments-only, no summary)
- Remove initiative-level request changes button (no comment system there)

apps/web/src/components/review/InitiativeReview.tsx

@@ -1,6 +1,6 @@
 import { useCallback, useMemo, useRef, useState } from "react";
 import { toast } from "sonner";
-import { Loader2, GitBranch, ArrowRight, FileCode, Plus, Minus, Upload, GitMerge, RotateCcw } from "lucide-react";
+import { Loader2, GitBranch, ArrowRight, FileCode, Plus, Minus, Upload, GitMerge } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { trpc } from "@/lib/trpc";
 import { parseUnifiedDiff } from "./parse-diff";
@@ -82,14 +82,6 @@ export function InitiativeReview({ initiativeId, onCompleted }: InitiativeReview
     onError: (err) => toast.error(`Failed to stop: ${err.message}`),
   });
 
-  const requestChangesMutation = trpc.requestInitiativeChanges.useMutation({
-    onSuccess: () => {
-      toast.success("Changes requested — review task created");
-      onCompleted();
-    },
-    onError: (err) => toast.error(err.message),
-  });
-
   const approveMutation = trpc.approveInitiativeReview.useMutation({
     onSuccess: (_data, variables) => {
       const msg = variables.strategy === "merge_and_push"
@@ -197,24 +189,6 @@ export function InitiativeReview({ initiativeId, onCompleted }: InitiativeReview
           {/* Right: preview + action buttons */}
           <div className="flex items-center gap-2 shrink-0">
             {previewState && <PreviewControls preview={previewState} />}
-            <Button
-              variant="outline"
-              size="sm"
-              onClick={() => {
-                const summary = window.prompt("Describe the changes needed:");
-                if (!summary?.trim()) return;
-                requestChangesMutation.mutate({ initiativeId, summary: summary.trim() });
-              }}
-              disabled={requestChangesMutation.isPending}
-              className="h-8 text-xs px-3 text-status-error-fg border-status-error-border hover:bg-status-error-bg"
-            >
-              {requestChangesMutation.isPending ? (
-                <Loader2 className="h-3 w-3 animate-spin" />
-              ) : (
-                <RotateCcw className="h-3 w-3" />
-              )}
-              Request Changes
-            </Button>
             <Button
               variant="outline"
               size="sm"

apps/web/src/components/review/ReviewHeader.tsx

@@ -64,22 +64,32 @@ export function ReviewHeader({
   const totalAdditions = files.reduce((s, f) => s + f.additions, 0);
   const totalDeletions = files.reduce((s, f) => s + f.deletions, 0);
   const [showConfirmation, setShowConfirmation] = useState(false);
+  const [showRequestConfirm, setShowRequestConfirm] = useState(false);
   const confirmRef = useRef<HTMLDivElement>(null);
+  const requestConfirmRef = useRef<HTMLDivElement>(null);
 
-  // Click-outside handler to dismiss confirmation
+  // Click-outside handler to dismiss confirmation dropdowns
   useEffect(() => {
-    if (!showConfirmation) return;
+    if (!showConfirmation && !showRequestConfirm) return;
     function handleClickOutside(e: MouseEvent) {
       if (
+        showConfirmation &&
         confirmRef.current &&
         !confirmRef.current.contains(e.target as Node)
       ) {
         setShowConfirmation(false);
       }
+      if (
+        showRequestConfirm &&
+        requestConfirmRef.current &&
+        !requestConfirmRef.current.contains(e.target as Node)
+      ) {
+        setShowRequestConfirm(false);
+      }
     }
     document.addEventListener("mousedown", handleClickOutside);
     return () => document.removeEventListener("mousedown", handleClickOutside);
-  }, [showConfirmation]);
+  }, [showConfirmation, showRequestConfirm]);
 
   const viewed = viewedCount ?? 0;
   const total = totalCount ?? 0;
@@ -187,20 +197,60 @@ export function ReviewHeader({
             <>
               {status === "pending" && (
                 <>
-                  <Button
-                    variant="outline"
-                    size="sm"
-                    onClick={onRequestChanges}
-                    disabled={isRequestingChanges}
-                    className="h-8 text-xs px-3 border-status-error-border/50 text-status-error-fg hover:bg-status-error-bg/50 hover:border-status-error-border"
-                  >
-                    {isRequestingChanges ? (
-                      <Loader2 className="h-3 w-3 animate-spin" />
-                    ) : (
-                      <X className="h-3 w-3" />
+                  <div className="relative" ref={requestConfirmRef}>
+                    <Button
+                      variant="outline"
+                      size="sm"
+                      onClick={() => setShowRequestConfirm(true)}
+                      disabled={isRequestingChanges || unresolvedCount === 0}
+                      className="h-8 text-xs px-3 border-status-error-border/50 text-status-error-fg hover:bg-status-error-bg/50 hover:border-status-error-border"
+                    >
+                      {isRequestingChanges ? (
+                        <Loader2 className="h-3 w-3 animate-spin" />
+                      ) : (
+                        <X className="h-3 w-3" />
+                      )}
+                      Request Changes
+                    </Button>
+
+                    {showRequestConfirm && (
+                      <div className="absolute right-0 top-full mt-1 z-30 w-64 rounded-lg border border-border bg-card shadow-lg p-4">
+                        <p className="text-sm font-semibold mb-3">
+                          Request changes?
+                        </p>
+                        <div className="space-y-1.5 mb-4">
+                          <div className="flex items-center gap-2 text-xs">
+                            <AlertCircle className="h-3.5 w-3.5 text-status-error-fg" />
+                            <span className="text-muted-foreground">
+                              {unresolvedCount} unresolved {unresolvedCount === 1 ? "comment" : "comments"} will be sent
+                            </span>
+                          </div>
+                        </div>
+                        <div className="flex items-center justify-end gap-2">
+                          <Button
+                            variant="ghost"
+                            size="sm"
+                            onClick={() => setShowRequestConfirm(false)}
+                            className="h-8 text-xs"
+                          >
+                            Cancel
+                          </Button>
+                          <Button
+                            variant="outline"
+                            size="sm"
+                            onClick={() => {
+                              setShowRequestConfirm(false);
+                              onRequestChanges();
+                            }}
+                            className="h-8 px-4 text-xs font-semibold shadow-sm border-status-error-border text-status-error-fg hover:bg-status-error-bg"
+                          >
+                            <X className="h-3.5 w-3.5" />
+                            Request Changes
+                          </Button>
+                        </div>
+                      </div>
                     )}
-                    Request Changes
-                  </Button>
+                  </div>
                   <div className="relative" ref={confirmRef}>
                     <Button
                       size="sm"

apps/web/src/components/review/ReviewTab.tsx

@@ -249,9 +249,7 @@ export function ReviewTab({ initiativeId }: ReviewTabProps) {
 
   const handleRequestChanges = useCallback(() => {
     if (!activePhaseId) return;
-    const summary = window.prompt("Optional: describe what needs to change (leave blank for comments only)");
-    if (summary === null) return; // cancelled
-    requestChangesMutation.mutate({ phaseId: activePhaseId, summary: summary || undefined });
+    requestChangesMutation.mutate({ phaseId: activePhaseId });
   }, [activePhaseId, requestChangesMutation]);
 
   const handleFileClick = useCallback((filePath: string) => {