Add collapsible detailed view

Implements expand/collapse for the All Fields (Detailed View) sections in the moderation queue:
- Adds useDetailedViewState hook to persist collapse state in localStorage (default collapsed)
- Adds DetailedViewCollapsible wrapper component using Radix Collapsible
- Updates SubmissionItemsList to wrap each detailed view block with the new collapsible, and imports the new hook and component

X-Lovable-Edit-ID: edt-a95a840d-e7e7-4f9e-aa25-03bb68194aee

src/components/moderation/DetailedViewCollapsible.tsx

@@ -0,0 +1,54 @@
+import { ChevronDown, ChevronUp } from 'lucide-react';
+import { Collapsible, CollapsibleTrigger, CollapsibleContent } from '@/components/ui/collapsible';
+import { Button } from '@/components/ui/button';
+import { cn } from '@/lib/utils';
+
+interface DetailedViewCollapsibleProps {
+  isCollapsed: boolean;
+  onToggle: () => void;
+  children: React.ReactNode;
+  className?: string;
+}
+
+/**
+ * Collapsible wrapper for detailed field-by-field view sections
+ * Provides expand/collapse functionality with visual indicators
+ */
+export function DetailedViewCollapsible({
+  isCollapsed,
+  onToggle,
+  children,
+  className
+}: DetailedViewCollapsibleProps) {
+  return (
+    <Collapsible open={!isCollapsed} onOpenChange={() => onToggle()}>
+      <div className={cn("mt-6 pt-6 border-t", className)}>
+        <CollapsibleTrigger asChild>
+          <Button
+            variant="ghost"
+            size="sm"
+            className="w-full flex items-center justify-between hover:bg-muted/50 p-2 h-auto"
+          >
+            <div className="text-xs font-semibold text-muted-foreground uppercase tracking-wide">
+              All Fields (Detailed View)
+            </div>
+            <div className="flex items-center gap-2">
+              <span className="text-xs text-muted-foreground normal-case font-normal">
+                {isCollapsed ? 'Show' : 'Hide'}
+              </span>
+              {isCollapsed ? (
+                <ChevronDown className="h-4 w-4 text-muted-foreground" />
+              ) : (
+                <ChevronUp className="h-4 w-4 text-muted-foreground" />
+              )}
+            </div>
+          </Button>
+        </CollapsibleTrigger>
+        
+        <CollapsibleContent className="mt-3">
+          {children}
+        </CollapsibleContent>
+      </div>
+    </Collapsible>
+  );
+}

src/components/moderation/SubmissionItemsList.tsx

@@ -7,6 +7,7 @@ import { RichRideDisplay } from './displays/RichRideDisplay';
 import { RichCompanyDisplay } from './displays/RichCompanyDisplay';
 import { RichRideModelDisplay } from './displays/RichRideModelDisplay';
 import { RichTimelineEventDisplay } from './displays/RichTimelineEventDisplay';
+import { DetailedViewCollapsible } from './DetailedViewCollapsible';
 import { Skeleton } from '@/components/ui/skeleton';
 import { Alert, AlertDescription } from '@/components/ui/alert';
 import { Badge } from '@/components/ui/badge';
@@ -17,6 +18,7 @@ import type { ParkSubmissionData, RideSubmissionData, CompanySubmissionData, Rid
 import type { TimelineSubmissionData } from '@/types/timeline';
 import { getErrorMessage, handleNonCriticalError } from '@/lib/errorHandler';
 import { ModerationErrorBoundary } from '@/components/error/ModerationErrorBoundary';
+import { useDetailedViewState } from '@/hooks/useDetailedViewState';
 
 interface SubmissionItemsListProps {
   submissionId: string;
@@ -34,6 +36,7 @@ export const SubmissionItemsList = memo(function SubmissionItemsList({
   const [loading, setLoading] = useState(true);
   const [refreshing, setRefreshing] = useState(false);
   const [error, setError] = useState<string | null>(null);
+  const { isCollapsed, toggle } = useDetailedViewState();
 
   useEffect(() => {
     fetchSubmissionItems();
@@ -188,17 +191,14 @@ export const SubmissionItemsList = memo(function SubmissionItemsList({
             data={entityData as unknown as ParkSubmissionData}
             actionType={actionType}
           />
-          <div className="mt-6 pt-6 border-t">
+          <DetailedViewCollapsible isCollapsed={isCollapsed} onToggle={toggle}>
-            <div className="text-xs font-semibold text-muted-foreground uppercase tracking-wide mb-3">
-              All Fields (Detailed View)
-            </div>
             <SubmissionChangesDisplay 
               item={item}
               view="detailed"
               showImages={showImages}
               submissionId={submissionId}
             />
-          </div>
+          </DetailedViewCollapsible>
         </>
       );
     }
@@ -211,17 +211,14 @@ export const SubmissionItemsList = memo(function SubmissionItemsList({
             data={entityData as unknown as RideSubmissionData}
             actionType={actionType}
           />
-          <div className="mt-6 pt-6 border-t">
+          <DetailedViewCollapsible isCollapsed={isCollapsed} onToggle={toggle}>
-            <div className="text-xs font-semibold text-muted-foreground uppercase tracking-wide mb-3">
-              All Fields (Detailed View)
-            </div>
             <SubmissionChangesDisplay 
               item={item}
               view="detailed"
               showImages={showImages}
               submissionId={submissionId}
             />
-          </div>
+          </DetailedViewCollapsible>
         </>
       );
     }
@@ -234,17 +231,14 @@ export const SubmissionItemsList = memo(function SubmissionItemsList({
             data={entityData as unknown as CompanySubmissionData}
             actionType={actionType}
           />
-          <div className="mt-6 pt-6 border-t">
+          <DetailedViewCollapsible isCollapsed={isCollapsed} onToggle={toggle}>
-            <div className="text-xs font-semibold text-muted-foreground uppercase tracking-wide mb-3">
-              All Fields (Detailed View)
-            </div>
             <SubmissionChangesDisplay 
               item={item}
               view="detailed"
               showImages={showImages}
               submissionId={submissionId}
             />
-          </div>
+          </DetailedViewCollapsible>
         </>
       );
     }
@@ -257,17 +251,14 @@ export const SubmissionItemsList = memo(function SubmissionItemsList({
             data={entityData as unknown as RideModelSubmissionData}
             actionType={actionType}
           />
-          <div className="mt-6 pt-6 border-t">
+          <DetailedViewCollapsible isCollapsed={isCollapsed} onToggle={toggle}>
-            <div className="text-xs font-semibold text-muted-foreground uppercase tracking-wide mb-3">
-              All Fields (Detailed View)
-            </div>
             <SubmissionChangesDisplay 
               item={item}
               view="detailed"
               showImages={showImages}
               submissionId={submissionId}
             />
-          </div>
+          </DetailedViewCollapsible>
         </>
       );
     }
@@ -280,17 +271,14 @@ export const SubmissionItemsList = memo(function SubmissionItemsList({
             data={entityData as unknown as TimelineSubmissionData}
             actionType={actionType}
           />
-          <div className="mt-6 pt-6 border-t">
+          <DetailedViewCollapsible isCollapsed={isCollapsed} onToggle={toggle}>
-            <div className="text-xs font-semibold text-muted-foreground uppercase tracking-wide mb-3">
-              All Fields (Detailed View)
-            </div>
             <SubmissionChangesDisplay 
               item={item}
               view="detailed"
               showImages={showImages}
               submissionId={submissionId}
             />
-          </div>
+          </DetailedViewCollapsible>
         </>
       );
     }

src/hooks/useDetailedViewState.ts

@@ -0,0 +1,48 @@
+import { useState, useEffect } from 'react';
+import { logger } from '@/lib/logger';
+
+const STORAGE_KEY = 'detailed-view-collapsed';
+
+interface UseDetailedViewStateReturn {
+  isCollapsed: boolean;
+  toggle: () => void;
+  setCollapsed: (value: boolean) => void;
+}
+
+/**
+ * Hook to manage detailed view collapsed/expanded state
+ * Syncs with localStorage for persistence across sessions
+ * Defaults to collapsed to reduce visual clutter
+ */
+export function useDetailedViewState(): UseDetailedViewStateReturn {
+  const [isCollapsed, setIsCollapsed] = useState<boolean>(() => {
+    // Initialize from localStorage on mount
+    try {
+      const stored = localStorage.getItem(STORAGE_KEY);
+      // Default to collapsed (true) to reduce visual clutter
+      return stored ? JSON.parse(stored) : true;
+    } catch (error) {
+      logger.warn('Error reading detailed view state from localStorage', { error });
+      return true;
+    }
+  });
+
+  // Sync to localStorage when state changes
+  useEffect(() => {
+    try {
+      localStorage.setItem(STORAGE_KEY, JSON.stringify(isCollapsed));
+    } catch (error) {
+      logger.warn('Error saving detailed view state to localStorage', { error });
+    }
+  }, [isCollapsed]);
+
+  const toggle = () => setIsCollapsed(prev => !prev);
+  
+  const setCollapsed = (value: boolean) => setIsCollapsed(value);
+
+  return {
+    isCollapsed,
+    toggle,
+    setCollapsed,
+  };
+}