frontend/src/features/documents/mobile/DocumentsMobileScreen.tsx

@@ -1,4 +1,4 @@
-import React, { useRef } from 'react';
+import React, { useRef, useMemo } from 'react';
 import { useAuth0 } from '@auth0/auth0-react';
 import { isAxiosError } from 'axios';
 import { useNavigate } from 'react-router-dom';
@@ -7,6 +7,8 @@ import { useDocumentsList } from '../hooks/useDocuments';
 import { useUploadWithProgress } from '../hooks/useUploadWithProgress';
 import { Button } from '../../../shared-minimal/components/Button';
 import { AddDocumentDialog } from '../components/AddDocumentDialog';
+import { useVehicles } from '../../vehicles/hooks/useVehicles';
+import { getVehicleLabel } from '../utils/vehicleLabel';
 
 export const DocumentsMobileScreen: React.FC = () => {
   console.log('[DocumentsMobileScreen] Component initializing');
@@ -17,12 +19,15 @@ export const DocumentsMobileScreen: React.FC = () => {
 
   // Data hooks (unconditional per React rules)
   const { data, isLoading, error } = useDocumentsList();
+  const { data: vehicles } = useVehicles();
   const inputRef = useRef<HTMLInputElement | null>(null);
   const [currentId, setCurrentId] = React.useState<string | null>(null);
   const upload = useUploadWithProgress(currentId || '');
   const navigate = useNavigate();
   const [isAddOpen, setIsAddOpen] = React.useState(false);
 
+  const vehiclesMap = useMemo(() => new Map(vehicles?.map(v => [v.id, v]) || []), [vehicles]);
+
   const triggerUpload = (docId: string) => {
     try {
       setCurrentId(docId);
@@ -170,14 +175,25 @@ export const DocumentsMobileScreen: React.FC = () => {
           {!isLoading && !hasError && data && data.length > 0 && (
             <div className="space-y-3">
               {data.map((doc) => {
-                const vehicleLabel = doc.vehicleId ? `${doc.vehicleId.slice(0, 8)}...` : '—';
+                const vehicle = vehiclesMap.get(doc.vehicleId);
+                const vehicleLabel = getVehicleLabel(vehicle);
+                const isShared = doc.sharedVehicleIds.length > 0;
                 return (
-                <div key={doc.id} className="flex items-center justify-between border rounded-xl p-3">
+                <div key={doc.id} className="border rounded-xl p-3 space-y-2">
                   <div>
                     <div className="font-medium text-slate-800 dark:text-avus">{doc.title}</div>
-                    <div className="text-xs text-slate-500 dark:text-titanio">{doc.documentType} • {vehicleLabel}</div>
+                    <div className="text-xs text-slate-500 dark:text-titanio">
+                      {doc.documentType}
+                      {isShared && ' • Shared'}
+                    </div>
+                    <button
+                      onClick={() => navigate(`/garage/vehicles/${doc.vehicleId}`)}
+                      className="text-xs text-blue-600 hover:text-blue-800 underline min-h-[44px] inline-flex items-center"
+                    >
+                      {vehicleLabel}
+                    </button>
                   </div>
-                  <div className="flex gap-2 items-center">
+                  <div className="flex gap-2 items-center flex-wrap">
                     <Button onClick={() => navigate(`/garage/documents/${doc.id}`)}>Open</Button>
                     <Button onClick={() => triggerUpload(doc.id)}>Upload</Button>
                     {upload.isPending && currentId === doc.id && (

frontend/src/features/documents/pages/DocumentDetailPage.tsx

@@ -1,4 +1,4 @@
-import React, { useRef } from 'react';
+import React, { useRef, useMemo } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { useAuth0 } from '@auth0/auth0-react';
 import { isAxiosError } from 'axios';
@@ -8,15 +8,21 @@ import { useDocument } from '../hooks/useDocuments';
 import { useUploadWithProgress } from '../hooks/useUploadWithProgress';
 import { documentsApi } from '../api/documents.api';
 import { DocumentPreview } from '../components/DocumentPreview';
+import { useVehicle, useVehicles } from '../../vehicles/hooks/useVehicles';
+import { getVehicleLabel } from '../utils/vehicleLabel';
 
 export const DocumentDetailPage: React.FC = () => {
   const { id } = useParams<{ id: string }>();
   const navigate = useNavigate();
   const { isAuthenticated, isLoading: authLoading, loginWithRedirect } = useAuth0();
   const { data: doc, isLoading, error } = useDocument(id);
+  const { data: vehicle } = useVehicle(doc?.vehicleId || '');
+  const { data: vehicles } = useVehicles();
   const inputRef = useRef<HTMLInputElement | null>(null);
   const upload = useUploadWithProgress(id!);
 
+  const vehiclesMap = useMemo(() => new Map(vehicles?.map(v => [v.id, v]) || []), [vehicles]);
+
   const handleDownload = async () => {
     if (!id) return;
     const blob = await documentsApi.download(id);
@@ -141,7 +147,35 @@ export const DocumentDetailPage: React.FC = () => {
         <div className="p-4 space-y-2">
           <h2 className="text-xl font-semibold">{doc.title}</h2>
           <div className="text-sm text-slate-500">Type: {doc.documentType}</div>
-          <div className="text-sm text-slate-500">Vehicle: {doc.vehicleId}</div>
+          <div className="text-sm">
+            <span className="text-slate-500">Vehicle: </span>
+            <button
+              onClick={() => navigate(`/garage/vehicles/${doc.vehicleId}`)}
+              className="text-blue-600 hover:text-blue-800 underline min-h-[44px] inline-flex items-center"
+            >
+              {getVehicleLabel(vehicle)}
+            </button>
+          </div>
+          {doc.sharedVehicleIds.length > 0 && (
+            <div className="text-sm text-slate-500 space-y-1">
+              <div className="font-medium">Shared with:</div>
+              <ul className="list-disc list-inside pl-2">
+                {doc.sharedVehicleIds.map((vehicleId) => {
+                  const sharedVehicle = vehiclesMap.get(vehicleId);
+                  return (
+                    <li key={vehicleId}>
+                      <button
+                        onClick={() => navigate(`/garage/vehicles/${vehicleId}`)}
+                        className="text-blue-600 hover:text-blue-800 underline min-h-[44px] inline-flex items-center"
+                      >
+                        {getVehicleLabel(sharedVehicle)}
+                      </button>
+                    </li>
+                  );
+                })}
+              </ul>
+            </div>
+          )}
           <div className="pt-2">
             <DocumentPreview doc={doc} />
           </div>

frontend/src/features/documents/pages/DocumentsPage.tsx

@@ -1,18 +1,23 @@
-import React from 'react';
+import React, { useMemo } from 'react';
 import { useAuth0 } from '@auth0/auth0-react';
 import { useDocumentsList, useDeleteDocument } from '../hooks/useDocuments';
 import { Card } from '../../../shared-minimal/components/Card';
 import { Button } from '../../../shared-minimal/components/Button';
 import { useNavigate } from 'react-router-dom';
 import { AddDocumentDialog } from '../components/AddDocumentDialog';
+import { useVehicles } from '../../vehicles/hooks/useVehicles';
+import { getVehicleLabel } from '../utils/vehicleLabel';
 
 export const DocumentsPage: React.FC = () => {
   const { isAuthenticated, isLoading: authLoading, loginWithRedirect } = useAuth0();
   const { data, isLoading, error } = useDocumentsList();
+  const { data: vehicles } = useVehicles();
   const navigate = useNavigate();
   const removeDoc = useDeleteDocument();
   const [isAddOpen, setIsAddOpen] = React.useState(false);
 
+  const vehiclesMap = useMemo(() => new Map(vehicles?.map(v => [v.id, v]) || []), [vehicles]);
+
   // Show loading while auth is initializing
   if (authLoading) {
     return (
@@ -124,19 +129,36 @@ export const DocumentsPage: React.FC = () => {
 
       {!isLoading && !error && data && data.length > 0 && (
         <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
-          {data.map((doc) => (
-            <Card key={doc.id}>
-              <div className="p-4 space-y-2">
-                <div className="font-medium">{doc.title}</div>
-                <div className="text-sm text-slate-500">Type: {doc.documentType}</div>
-                <div className="text-sm text-slate-500">Vehicle: {doc.vehicleId}</div>
-                <div className="flex gap-2 pt-2">
-                  <Button onClick={() => navigate(`/garage/documents/${doc.id}`)}>Open</Button>
-                  <Button variant="danger" onClick={() => removeDoc.mutate(doc.id)}>Delete</Button>
+          {data.map((doc) => {
+            const vehicle = vehiclesMap.get(doc.vehicleId);
+            const vehicleLabel = getVehicleLabel(vehicle);
+            return (
+              <Card key={doc.id}>
+                <div className="p-4 space-y-2">
+                  <div className="font-medium">{doc.title}</div>
+                  <div className="text-sm text-slate-500">Type: {doc.documentType}</div>
+                  <div className="text-sm">
+                    <span className="text-slate-500">Vehicle: </span>
+                    <button
+                      onClick={() => navigate(`/garage/vehicles/${doc.vehicleId}`)}
+                      className="text-blue-600 hover:text-blue-800 underline min-h-[44px] inline-flex items-center"
+                    >
+                      {vehicleLabel}
+                    </button>
+                  </div>
+                  {doc.sharedVehicleIds.length > 0 && (
+                    <div className="text-xs text-slate-500">
+                      Shared with {doc.sharedVehicleIds.length} other vehicle{doc.sharedVehicleIds.length > 1 ? 's' : ''}
+                    </div>
+                  )}
+                  <div className="flex gap-2 pt-2">
+                    <Button onClick={() => navigate(`/garage/documents/${doc.id}`)}>Open</Button>
+                    <Button variant="danger" onClick={() => removeDoc.mutate(doc.id)}>Delete</Button>
+                  </div>
                 </div>
-              </div>
-            </Card>
-          ))}
+              </Card>
+            );
+          })}
         </div>
       )}
     </div>

frontend/src/features/documents/utils/vehicleLabel.ts

@@ -0,0 +1,11 @@
+import type { Vehicle } from '../../vehicles/types/vehicles.types';
+
+export const getVehicleLabel = (vehicle: Vehicle | undefined): string => {
+  if (!vehicle) return 'Unknown Vehicle';
+  if (vehicle.nickname?.trim()) return vehicle.nickname.trim();
+  const parts = [vehicle.year, vehicle.make, vehicle.model, vehicle.trimLevel].filter(Boolean);
+  const primary = parts.join(' ').trim();
+  if (primary.length > 0) return primary;
+  if (vehicle.vin?.length > 0) return vehicle.vin;
+  return vehicle.id.slice(0, 8) + '...';
+};