Wire Resolve onto anchored suggestion cards (PAP-10568)

onResolveSuggestion was only passed to the orphaned-suggestion SuggestionCard
branch, so the Resolve action only appeared on orphaned suggestions — the
opposite of where it's useful, since orphaned suggestions can't be applied.
Wire it onto the non-orphan render path too, and add a rail regression test
asserting the Resolve button renders on anchored suggestion cards.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ui/src/components/documents/DocumentReviewRail.test.tsx

@@ -224,6 +224,26 @@ describe("DocumentReviewRail", () => {
     expect(container.textContent).toContain("added text");
   });
 
+  it("wires Resolve onto anchored (non-orphan) suggestion cards", async () => {
+    // Regression: onResolveSuggestion was only wired on the orphaned-suggestion
+    // branch, so Resolve never appeared on healthy/anchored cards where it's
+    // most useful. Assert the non-orphan render path exposes it.
+    await act(() =>
+      root.render(
+        <DocumentReviewRail
+          reviewIndex={makeIndex()}
+          canReview
+          canFinishReview
+          latestRevisionId="rev-1"
+          initialTab="suggestions"
+          onResolveSuggestion={vi.fn()}
+          {...baseHandlers}
+        />,
+      ),
+    );
+    expect(container.querySelector('[data-testid="suggestion-resolve-sug-1"]')).not.toBeNull();
+  });
+
   it("pins orphaned anchors into a collapsible group when the orphan filter is on", async () => {
     const index = makeIndex({
       annotationThreads: [

ui/src/components/documents/DocumentReviewRail.tsx

@@ -15,7 +15,7 @@ import {
   TooltipProvider,
   TooltipTrigger,
 } from "@/components/ui/tooltip";
-import { cn } from "@/lib/utils";
+import { cn, isApplePlatform } from "@/lib/utils";
 import type { ReviewAuthorMaps } from "@/lib/document-review-authors";
 import { DocumentThreadCard, type RailThread } from "./DocumentThreadCard";
 import { SuggestionCard } from "./SuggestionCard";
@@ -371,6 +371,7 @@ function ReviewRailBody({
                       authorMaps={authorMaps}
                       onAccept={onAcceptSuggestion}
                       onReject={onRejectSuggestion}
+                      onResolve={onResolveSuggestion}
                       onReply={onReplySuggestion}
                       onViewDiff={onViewSuggestionDiff}
                     />
@@ -447,10 +448,12 @@ function OrphanGroup({ count, children }: { count: number; children: React.React
 }
 
 function RailEmpty({ message }: { message: string }) {
+  // Platform-aware hint: macOS/iOS reviewers see ⌘⇧M, Windows/Linux see Ctrl+Shift+M.
+  const hotkey = isApplePlatform() ? "⌘⇧M" : "Ctrl+Shift+M";
   return (
     <div className="px-2 py-8 text-center text-xs text-muted-foreground" data-testid="rail-empty">
       <p>{message}</p>
-      <p className="mt-1 text-[11px] opacity-70">⌘⇧M to comment from a selection</p>
+      <p className="mt-1 text-[11px] opacity-70">{hotkey} to comment from a selection</p>
     </div>
   );
 }