feat: split FileDiff into metadata FileDiff + hunk-bearing FileDiffDetail

Prepares the review components for the backend phase that returns
metadata-only file lists from getPhaseReviewDiff. FileDiff now holds
only path/status/additions/deletions; FileDiffDetail extends it with
hunks. Renames changeType→status and adds 'binary' to the union.

Also fixes two pre-existing TypeScript errors: InitiativeReview was
passing an unknown `comments` prop to DiffViewer (should be
commentsByLine), and ConflictResolutionPanel destructured an unused
`agent` variable.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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

@@ -11,7 +11,7 @@ interface ConflictResolutionPanelProps {
 }
 
 export function ConflictResolutionPanel({ initiativeId, conflicts, onResolved }: ConflictResolutionPanelProps) {
-  const { state, agent, questions, spawn, resume, stop, dismiss } = useConflictAgent(initiativeId);
+  const { state, agent: _agent, questions, spawn, resume, stop, dismiss } = useConflictAgent(initiativeId);
   const [showManual, setShowManual] = useState(false);
   const prevStateRef = useRef<string | null>(null);
 

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

@@ -1,4 +1,4 @@
-import type { FileDiff, DiffLine, ReviewComment } from "./types";
+import type { FileDiffDetail, DiffLine, ReviewComment } from "./types";
 import { FileCard } from "./FileCard";
 
 function getFileCommentMap(
@@ -13,7 +13,7 @@ function getFileCommentMap(
 }
 
 interface DiffViewerProps {
-  files: FileDiff[];
+  files: FileDiffDetail[];
   commentsByLine: Map<string, ReviewComment[]>;
   onAddComment: (
     filePath: string,

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

@@ -8,12 +8,12 @@ import {
   Circle,
 } from "lucide-react";
 import { Badge } from "@/components/ui/badge";
-import type { FileDiff, FileChangeType, DiffLine, ReviewComment } from "./types";
+import type { FileDiffDetail, DiffLine, ReviewComment } from "./types";
 import { HunkRows } from "./HunkRows";
 import { useHighlightedFile } from "./use-syntax-highlight";
 
 const changeTypeBadge: Record<
-  FileChangeType,
+  FileDiffDetail['status'],
   { label: string; classes: string } | null
 > = {
   added: {
@@ -32,17 +32,19 @@ const changeTypeBadge: Record<
       "bg-status-active-bg text-status-active-fg border-status-active-border",
   },
   modified: null,
+  binary: null,
 };
 
-const leftBorderClass: Record<FileChangeType, string> = {
+const leftBorderClass: Record<FileDiffDetail['status'], string> = {
   added: "border-l-2 border-l-status-success-fg",
   deleted: "border-l-2 border-l-status-error-fg",
   renamed: "border-l-2 border-l-status-active-fg",
   modified: "border-l-2 border-l-primary/40",
+  binary: "border-l-2 border-l-primary/40",
 };
 
 interface FileCardProps {
-  file: FileDiff;
+  file: FileDiffDetail;
   commentsByLine: Map<string, ReviewComment[]>;
   onAddComment: (
     filePath: string,
@@ -80,7 +82,7 @@ export function FileCard({
     [commentsByLine],
   );
 
-  const badge = changeTypeBadge[file.changeType];
+  const badge = changeTypeBadge[file.status];
 
   // Flatten all hunk lines for syntax highlighting
   const allLines = useMemo(
@@ -93,7 +95,7 @@ export function FileCard({
     <div className="rounded-lg border border-border overflow-clip">
       {/* File header — sticky so it stays visible when scrolling */}
       <button
-        className={`sticky z-10 flex w-full items-center gap-2 px-3 py-2 bg-muted hover:bg-muted/90 text-left text-sm font-mono transition-colors ${leftBorderClass[file.changeType]}`}
+        className={`sticky z-10 flex w-full items-center gap-2 px-3 py-2 bg-muted hover:bg-muted/90 text-left text-sm font-mono transition-colors ${leftBorderClass[file.status]}`}
         style={{ top: 'var(--review-header-h, 0px)' }}
         onClick={() => setExpanded(!expanded)}
       >

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

@@ -308,7 +308,7 @@ export function InitiativeReview({ initiativeId, onCompleted }: InitiativeReview
           ) : (
             <DiffViewer
               files={files}
-              comments={[]}
+              commentsByLine={new Map()}
               onAddComment={() => {}}
               onResolveComment={() => {}}
               onUnresolveComment={() => {}}

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

@@ -165,10 +165,12 @@ function getFileName(path: string): string {
   return lastSlash >= 0 ? path.slice(lastSlash + 1) : path;
 }
 
-const changeTypeDotColor: Record<string, string> = {
+const changeTypeDotColor: Record<string, string | undefined> = {
   added: "bg-status-success-fg",
   deleted: "bg-status-error-fg",
   renamed: "bg-status-active-fg",
+  modified: undefined,
+  binary: undefined,
 };
 
 function FilesView({
@@ -310,7 +312,7 @@ function FilesView({
                 const isInView = activeFilePaths.has(file.newPath);
                 const dimmed = selectedCommit && !isInView;
                 const isViewed = viewedFiles.has(file.newPath);
-                const dotColor = changeTypeDotColor[file.changeType];
+                const dotColor = changeTypeDotColor[file.status];
 
                 return (
                   <button

apps/web/src/components/review/parse-diff.ts

@@ -1,10 +1,10 @@
-import type { FileDiff, FileChangeType, DiffHunk, DiffLine } from "./types";
+import type { FileDiffDetail, FileDiff, DiffHunk, DiffLine } from "./types";
 
 /**
- * Parse a unified diff string into structured FileDiff objects.
+ * Parse a unified diff string into structured FileDiffDetail objects.
  */
-export function parseUnifiedDiff(raw: string): FileDiff[] {
+export function parseUnifiedDiff(raw: string): FileDiffDetail[] {
-  const files: FileDiff[] = [];
+  const files: FileDiffDetail[] = [];
   const fileChunks = raw.split(/^diff --git /m).filter(Boolean);
 
   for (const chunk of fileChunks) {
@@ -90,19 +90,19 @@ export function parseUnifiedDiff(raw: string): FileDiff[] {
       hunks.push({ header, oldStart, oldCount, newStart, newCount, lines: hunkLines });
     }
 
-    // Derive changeType from header markers and path comparison
+    // Derive status from header markers and path comparison
-    let changeType: FileChangeType;
+    let status: FileDiff['status'];
     if (hasOldDevNull) {
-      changeType = "added";
+      status = "added";
     } else if (hasNewDevNull) {
-      changeType = "deleted";
+      status = "deleted";
     } else if (oldPath !== newPath) {
-      changeType = "renamed";
+      status = "renamed";
     } else {
-      changeType = "modified";
+      status = "modified";
     }
 
-    files.push({ oldPath, newPath, hunks, additions, deletions, changeType });
+    files.push({ oldPath, newPath, hunks, additions, deletions, status });
   }
 
   return files;

apps/web/src/components/review/types.test.ts

@@ -0,0 +1,29 @@
+// @vitest-environment happy-dom
+import { describe, it, expect } from 'vitest';
+import type { FileDiff, FileDiffDetail } from './types';
+
+describe('FileDiff types', () => {
+  it('FileDiff accepts binary status', () => {
+    const f: FileDiff = {
+      oldPath: 'a.png',
+      newPath: 'a.png',
+      status: 'binary',
+      additions: 0,
+      deletions: 0,
+    };
+    expect(f.status).toBe('binary');
+  });
+
+  it('FileDiffDetail extends FileDiff with hunks', () => {
+    const d: FileDiffDetail = {
+      oldPath: 'a.ts',
+      newPath: 'a.ts',
+      status: 'modified',
+      additions: 5,
+      deletions: 2,
+      hunks: [],
+    };
+    expect(d.hunks).toEqual([]);
+    expect(d.additions).toBe(5);
+  });
+});

apps/web/src/components/review/types.ts

@@ -14,15 +14,20 @@ export interface DiffLine {
   newLineNumber: number | null;
 }
 
-export type FileChangeType = 'added' | 'modified' | 'deleted' | 'renamed';
+/** Metadata returned by getPhaseReviewDiff — no hunk content */
-
 export interface FileDiff {
   oldPath: string;
   newPath: string;
-  hunks: DiffHunk[];
+  /** 'binary' is new — prior changeType used FileChangeType which had no 'binary' */
+  status: 'added' | 'modified' | 'deleted' | 'renamed' | 'binary';
   additions: number;
   deletions: number;
-  changeType: FileChangeType;
+  projectId?: string;  // present in multi-project initiatives
+}
+
+/** Full diff with parsed hunks — returned by getFileDiff, parsed client-side */
+export interface FileDiffDetail extends FileDiff {
+  hunks: DiffHunk[];
 }
 
 export interface ReviewComment {