feat: add tier gating for receipt scan in FuelLogForm (refs #131)

Free tier users see locked button with upgrade prompt dialog.
Pro+ users can capture receipts normally. Works on mobile and desktop.

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

frontend/src/features/fuel-logs/components/FuelLogForm.tsx

@@ -19,6 +19,8 @@ import { useFuelLogs } from '../hooks/useFuelLogs';
 import { useUserSettings } from '../hooks/useUserSettings';
 import { useReceiptOcr } from '../hooks/useReceiptOcr';
 import { useGeolocation } from '../../stations/hooks/useGeolocation';
+import { useTierAccess } from '../../../core/hooks/useTierAccess';
+import { UpgradeRequiredDialog } from '../../../shared-minimal/components/UpgradeRequiredDialog';
 import { CameraCapture } from '../../../shared/components/CameraCapture';
 import { CreateFuelLogRequest, FuelType } from '../types/fuel-logs.types';
 
@@ -48,6 +50,11 @@ const FuelLogFormComponent: React.FC<{ onSuccess?: () => void; initial?: Partial
   // Get user location for nearby station search
   const { coordinates: userLocation } = useGeolocation();
 
+  // Tier access check for receipt scan feature
+  const { hasAccess } = useTierAccess();
+  const hasReceiptScanAccess = hasAccess('fuelLog.receiptScan');
+  const [showUpgradeDialog, setShowUpgradeDialog] = useState(false);
+
   // Receipt OCR integration
   const {
     isCapturing,
@@ -217,9 +224,16 @@ const FuelLogFormComponent: React.FC<{ onSuccess?: () => void; initial?: Partial
             }}
           >
             <ReceiptCameraButton
-              onClick={startCapture}
+              onClick={() => {
+                if (!hasReceiptScanAccess) {
+                  setShowUpgradeDialog(true);
+                  return;
+                }
+                startCapture();
+              }}
               disabled={isProcessing || isLoading}
               variant="button"
+              locked={!hasReceiptScanAccess}
             />
           </Box>
 
@@ -436,6 +450,13 @@ const FuelLogFormComponent: React.FC<{ onSuccess?: () => void; initial?: Partial
       />
     )}
 
+    {/* Upgrade Required Dialog for Receipt Scan */}
+    <UpgradeRequiredDialog
+      featureKey="fuelLog.receiptScan"
+      open={showUpgradeDialog}
+      onClose={() => setShowUpgradeDialog(false)}
+    />
+
     {/* OCR Error Display */}
     {ocrError && (
       <Dialog open={!!ocrError} onClose={resetOcr} maxWidth="xs">

frontend/src/features/fuel-logs/components/ReceiptCameraButton.tsx

@@ -7,6 +7,7 @@ import React from 'react';
 import { Button, IconButton, Tooltip, useTheme, useMediaQuery } from '@mui/material';
 import CameraAltIcon from '@mui/icons-material/CameraAlt';
 import ReceiptIcon from '@mui/icons-material/Receipt';
+import LockOutlinedIcon from '@mui/icons-material/LockOutlined';
 
 export interface ReceiptCameraButtonProps {
   /** Called when user clicks to start capture */
@@ -17,6 +18,8 @@ export interface ReceiptCameraButtonProps {
   variant?: 'icon' | 'button' | 'auto';
   /** Size of the button */
   size?: 'small' | 'medium' | 'large';
+  /** Whether the feature is locked behind a tier gate */
+  locked?: boolean;
 }
 
 export const ReceiptCameraButton: React.FC<ReceiptCameraButtonProps> = ({
@@ -24,6 +27,7 @@ export const ReceiptCameraButton: React.FC<ReceiptCameraButtonProps> = ({
   disabled = false,
   variant = 'auto',
   size = 'medium',
+  locked = false,
 }) => {
   const theme = useTheme();
   const isMobile = useMediaQuery(theme.breakpoints.down('sm'));
@@ -31,28 +35,30 @@ export const ReceiptCameraButton: React.FC<ReceiptCameraButtonProps> = ({
   // Determine display variant
   const displayVariant = variant === 'auto' ? (isMobile ? 'icon' : 'button') : variant;
 
+  const tooltipTitle = locked ? 'Upgrade to Pro to scan receipts' : 'Scan Receipt';
+
   if (displayVariant === 'icon') {
     return (
-      <Tooltip title="Scan Receipt">
+      <Tooltip title={tooltipTitle}>
         <span>
           <IconButton
             onClick={onClick}
             disabled={disabled}
             color="primary"
             size={size}
-            aria-label="Scan receipt with camera"
+            aria-label={locked ? 'Scan receipt (Pro feature)' : 'Scan receipt with camera'}
             sx={{
-              backgroundColor: 'primary.light',
+              backgroundColor: locked ? 'action.disabledBackground' : 'primary.light',
-              color: 'primary.contrastText',
+              color: locked ? 'text.secondary' : 'primary.contrastText',
               '&:hover': {
-                backgroundColor: 'primary.main',
+                backgroundColor: locked ? 'action.hover' : 'primary.main',
               },
               '&.Mui-disabled': {
                 backgroundColor: 'action.disabledBackground',
               },
             }}
           >
-            <CameraAltIcon />
+            {locked ? <LockOutlinedIcon /> : <CameraAltIcon />}
           </IconButton>
         </span>
       </Tooltip>
@@ -60,14 +66,16 @@ export const ReceiptCameraButton: React.FC<ReceiptCameraButtonProps> = ({
   }
 
   return (
+    <Tooltip title={locked ? tooltipTitle : ''}>
+      <span>
         <Button
           onClick={onClick}
           disabled={disabled}
           variant="outlined"
-      color="primary"
+          color={locked ? 'inherit' : 'primary'}
           size={size}
-      startIcon={<ReceiptIcon />}
+          startIcon={locked ? <LockOutlinedIcon /> : <ReceiptIcon />}
-      endIcon={<CameraAltIcon />}
+          endIcon={locked ? undefined : <CameraAltIcon />}
           sx={{
             borderStyle: 'dashed',
             '&:hover': {
@@ -75,8 +83,10 @@ export const ReceiptCameraButton: React.FC<ReceiptCameraButtonProps> = ({
             },
           }}
         >
-      Scan Receipt
+          {locked ? 'Scan Receipt (Pro)' : 'Scan Receipt'}
         </Button>
+      </span>
+    </Tooltip>
   );
 };