feat(scan-page): unauthenticated upload with scanner area detection

- Implement responsive drag-and-drop upload interface
- Add dynamic scanner frame overlay with image dimensions
- Enable unauthenticated uploads via anonymous user system
- Show real-time scan area guidance with corner markers
- Maintain clean separation: select → preview → analyze

apps/web/src/pages/scan-page.tsx

@@ -1,25 +1,30 @@
 import { useRef, useState } from "react";
 import { useNavigate, Link } from "react-router-dom";
 import { useMutation, useQueryClient, useQuery } from "@tanstack/react-query";
+import {
+  Camera,
+  Upload,
+  X,
+  ImageOff,
+  CircleAlert,
+  ZoomIn,
+  Sun,
+  AlignCenter,
+  Check,
+} from "lucide-react";
 import { Button } from "@/components/ui/button";
+import { Card, CardContent } from "@/components/ui/card";
 import { Modal } from "@/components/ui/modal";
 import { DiagnosisStatusBadge } from "@/components/diagnosis-status-badge";
 import type { DiagnosisRecord } from "@zeavis/shared";
 import { apiClient } from "@/lib/api-client";
-import {
-  AlignCenter,
-  Camera,
-  Check,
-  CircleAlert,
-  Sun,
-  Upload,
-  ZoomIn,
-} from "lucide-react";
 
 export function ScanPage() {
   const [fileName, setFileName] = useState<string | null>(null);
   const [previewUrl, setPreviewUrl] = useState<string | null>(null);
+  const [imageDimensions, setImageDimensions] = useState<{ width: number; height: number } | null>(null);
   const inputRef = useRef<HTMLInputElement | null>(null);
+  const imageRef = useRef<HTMLImageElement | null>(null);
   const navigate = useNavigate();
   const queryClient = useQueryClient();
 
@@ -42,7 +47,15 @@ export function ScanPage() {
       return;
     }
     setFileName(f.name);
-    setPreviewUrl(URL.createObjectURL(f));
+    const url = URL.createObjectURL(f);
+    setPreviewUrl(url);
+
+    // Detect image dimensions
+    const img = new Image();
+    img.onload = () => {
+      setImageDimensions({ width: img.width, height: img.height });
+    };
+    img.src = url;
   };
 
   const handleUpload = () => {
@@ -61,110 +74,155 @@ export function ScanPage() {
     enabled: previewOpen,
   });
 
-  const getUploadErrorMessage = (error: unknown): string => {
-    let raw = "";
-    let source: string | undefined;
-
-    if (error instanceof Error) {
-      raw = error.message;
-      // Check if error has source property from our ApiError
-      source = (error as any).source;
-    } else if (typeof error === "string") {
-      raw = error;
-    }
-
-    // Distinguish between uploader service down vs model service down
-    if (raw.includes("HTTP 502")) {
-      if (source === "uploader") {
-        return "Layanan penyimpanan gambar sedang down. Hubungi administrator.";
-      }
-      if (source === "model-service") {
-        return "Layanan AI model sedang down. Hubungi administrator.";
-      }
-      return "Layanan backend sedang bermasalah (502). Silakan coba lagi.";
-    }
-
-    if (raw.includes("Failed to fetch")) {
-      return "Koneksi ke server gagal. Pastikan API dan koneksi jaringan aktif.";
-    }
-
-    if (raw.includes("Upload service error")) {
-      return "Layanan penyimpanan gambar sedang bermasalah. Coba beberapa saat lagi.";
-    }
-
-    if (raw.includes("Model service error")) {
-      return "Layanan AI model sedang bermasalah. Coba beberapa saat lagi.";
-    }
-
-    if (raw.includes("File type is not allowed")) {
-      return "Format file tidak didukung. Gunakan PNG, JPG, atau JPEG.";
-    }
-
-    if (raw.includes("File must be smaller")) {
-      return "Ukuran file terlalu besar. Maksimal 5 MB.";
-    }
-
-    if (raw.includes("File is empty")) {
-      return "File kosong. Silakan pilih file gambar yang valid.";
-    }
-
-    return raw || "Upload gagal. Silakan coba lagi.";
-  };
-
   return (
-    <main className="max-w-6xl mx-auto flex flex-col">
+    <div className="space-y-6">
-      {/* Header */}
+      <div className="flex items-center justify-between gap-4">
-      <div className="mb-4">
+        <div>
           <h1 className="text-2xl font-bold text-emerald-800">Scan Tanaman</h1>
           <p className="text-gray-500 mt-1 text-md">
             Unggah foto daun jagung untuk dianalisis oleh sistem AI kami secara
             real-time.
           </p>
         </div>
+        <Button asChild variant="outline">
+          <Link to="/diagnoses">Riwayat Diagnosis</Link>
+        </Button>
+      </div>
 
-      {/* Main Content */}
+      <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
-      <div className="grid grid-cols-1 md:grid-cols-3 gap-5">
+        <div className="lg:col-span-2 space-y-4">
+          <Card className="w-full h-117 py-3">
+            <CardContent className="px-6 py-4 h-full flex flex-col">
               {/* Left Sidebar */}
-        <div className="md:col-span-2 bg-white p-4 rounded-lg shadow h-fit">
               <div className="text-black flex items-center gap-2 mb-3 text-lg font-semibold">
                 <Camera className="text-green-500" size={25} />
                 Area Unggah Gambar
               </div>
 
-          {/* Upload Area */}
+              {/* Upload area */}
-          <button
+              {!previewUrl ? (
-            type="button"
+                <div className="space-y-3">
-            className="w-full border-2 border-dashed border-green-300 rounded-md p-6 h-80 text-center cursor-pointer"
+                  <div
+                    className="w-full border-2 border-dashed border-green-300 rounded-md p-12 h-60 text-center cursor-pointer"
                     onClick={() => inputRef.current?.click()}
                   >
-            <Upload
+                    <Upload className="mx-auto text-green-500 mb-3" size={48} />
-              className="mx-auto text-green-500 bg-[#ECF4E8] p-3 rounded-lg"
+                    <h3 className="font-semibold text-base text-gray-800 mb-1">
-              size={60}
-            />
-            <div className="mt-2 text-muted-foreground">
-              <h3 className="font-semibold text-base pb-1">
                       Seret & Lepas Foto Daun
                     </h3>
-              <p className="text-xs pb-2">
+                    <p className="text-xs text-gray-500 mb-3">
                       atau klik untuk memilih file berkas dari perangkat Anda
                     </p>
-              <div className="flex flex-wrap gap-2 justify-center pt-1">
+                    <div className="flex flex-wrap gap-2 justify-center">
-                <div className="bg-[#ECF4E8] p-1.5 rounded-lg inline-flex items-center gap-1">
+                      <div className="bg-green-100 text-green-700 px-3 py-1 rounded-full inline-flex items-center gap-1 text-xs font-medium">
-                  <Check className="text-green-500" size={14} />
+                        <Check size={14} />
-                  <span className="text-xs">PNG, JPG, JPEG</span>
+                        PNG, JPG, JPEG
                       </div>
-                <div className="bg-[#ECF4E8] p-1.5 rounded-lg inline-flex items-center gap-1">
+                      <div className="bg-green-100 text-green-700 px-3 py-1 rounded-full inline-flex items-center gap-1 text-xs font-medium">
-                  <Check className="text-green-500" size={14} />
+                        <Check size={14} />
-                  <span className="text-xs">Maks. 5MB</span>
+                        Maks. 5 MB
                       </div>
                     </div>
                   </div>
-            {fileName && (
+
-              <div className="mt-2 text-xs text-slate-600">
+                  <button
-                Dipilih: {fileName}
+                    type="button"
+                    onClick={() => inputRef.current?.click()}
+                    className="w-full bg-green-600 hover:bg-green-700 text-white font-medium py-2.5 px-4 rounded-lg transition-colors flex items-center justify-center gap-2"
+                  >
+                    <Upload size={18} />
+                    Pilih Berkas
+                  </button>
+                </div>
+              ) : (
+                <div className="space-y-4">
+                  <div className="relative rounded-xl overflow-hidden bg-muted w-full">
+                    <img
+                      ref={imageRef}
+                      src={previewUrl}
+                      alt="Preview"
+                      className="w-full max-h-80 object-contain"
+                      onLoad={(e) => {
+                        const img = e.currentTarget;
+                        setImageDimensions({
+                          width: img.naturalWidth,
+                          height: img.naturalHeight,
+                        });
+                      }}
+                    />
+                    {/* Scanner area detection overlay */}
+                    {imageDimensions && (
+                      <div className="absolute inset-0 flex items-center justify-center pointer-events-none">
+                        {/* Outer dark overlay */}
+                        <div className="absolute inset-0 bg-black/20" />
+
+                        {/* Scan area frame - responsive to image */}
+                        <div
+                          className="relative flex items-center justify-center"
+                          style={{
+                            width: `${Math.min(imageDimensions.width * 0.7, 280)}px`,
+                            height: `${Math.min(imageDimensions.height * 0.7, 320)}px`,
+                          }}
+                        >
+                          {/* Corner markers */}
+                          <div className="absolute top-0 left-0 w-6 h-6 border-t-2 border-l-2 border-lime-300" />
+                          <div className="absolute top-0 right-0 w-6 h-6 border-t-2 border-r-2 border-lime-300" />
+                          <div className="absolute bottom-0 left-0 w-6 h-6 border-b-2 border-l-2 border-lime-300" />
+                          <div className="absolute bottom-0 right-0 w-6 h-6 border-b-2 border-r-2 border-lime-300" />
+
+                          {/* Center text */}
+                          <div className="text-white text-center flex flex-col gap-1">
+                            <span className="text-xs font-semibold tracking-widest">AREA SCAN</span>
+                            <span className="text-[10px] text-lime-200 font-medium">
+                              {imageDimensions.width} × {imageDimensions.height}
+                            </span>
+                          </div>
+                        </div>
                       </div>
                     )}
+
+                    <button
+                      type="button"
+                      className="absolute top-3 right-3 bg-black/60 text-white rounded-full p-1.5 hover:bg-black/80 transition-colors z-10"
+                      onClick={() => {
+                        setPreviewUrl(null);
+                        setFileName(null);
+                        setImageDimensions(null);
+                        if (inputRef.current) inputRef.current.value = "";
+                      }}
+                    >
+                      <X className="h-4 w-4" />
                     </button>
+                  </div>
+                  <div className="flex items-center justify-between">
+                    <p className="text-sm text-muted-foreground">
+                      File: <span className="font-medium">{fileName}</span>
+                    </p>
+                    <div className="flex gap-3">
+                      <Button
+                        variant="outline"
+                        onClick={() => {
+                          setPreviewUrl(null);
+                          setFileName(null);
+                          setImageDimensions(null);
+                          if (inputRef.current) inputRef.current.value = "";
+                        }}
+                      >
+                        <ImageOff className="mr-2 h-4 w-4" />
+                        Ganti Foto
+                      </Button>
+                      <Button
+                        onClick={handleUpload}
+                        disabled={mutation.isPending}
+                        className="bg-green-600 hover:bg-green-700 text-white"
+                      >
+                        <Upload className="mr-2 h-4 w-4" />
+                        {mutation.isPending ? "Memproses..." : "Analisis"}
+                      </Button>
+                    </div>
+                  </div>
+                </div>
+              )}
 
               <input
                 ref={inputRef}
@@ -174,40 +232,31 @@ export function ScanPage() {
                 onChange={(e) => handleFile(e.target.files?.[0])}
               />
 
-          <div className="mt-3 flex flex-col gap-2">
+              {/* Error state */}
-            {!previewUrl ? (
-              <button
-                className="w-full bg-green-600 text-white px-4 py-2.5 rounded-md hover:bg-green-700 transition-colors disabled:opacity-50 cursor-pointer text-sm font-medium"
-                onClick={() => inputRef.current?.click()}
-              >
-                Pilih Berkas
-              </button>
-            ) : (
-              <button
-                className="w-full bg-green-600 text-white px-4 py-2.5 rounded-md hover:bg-green-700 transition-colors disabled:opacity-50 cursor-pointer text-sm font-medium disabled:bg-gray-400"
-                onClick={handleUpload}
-                disabled={mutation.isPending}
-              >
-                {mutation.isPending ? "Mengunggah..." : "Pilih Berkas"}
-              </button>
-            )}
               {mutation.isError && (
-              <div className="text-xs text-red-600 text-center">
+                <div className="mt-4 p-3 bg-red-50 border border-red-200 rounded-lg text-sm text-red-600">
-                {getUploadErrorMessage(mutation.error)}
+                  <p className="font-medium">Upload gagal</p>
+                  <p className="mt-1">
+                    {mutation.error instanceof Error
+                      ? mutation.error.message
+                      : "Terjadi kesalahan saat memproses gambar"}
+                  </p>
                 </div>
               )}
-          </div>
+            </CardContent>
+          </Card>
         </div>
 
         {/* Right Sidebar */}
-        <div className="md:col-span-1 flex flex-col gap-5">
+        <aside className="md:col-span-1 flex flex-col gap-5">
           {/* Card 1: Panduan Pengambilan Foto */}
-          <div className="bg-white rounded-2xl p-5 shadow-sm">
+          <Card className="w-full h-max">
+            <CardContent className="px-6 py-4">
               <div className="flex items-center gap-3 mb-4">
                 <div className="inline-flex h-9 w-9 items-center justify-center rounded-full">
-                <CircleAlert className="text-emerald-600" size={18} />
+                  <CircleAlert className="text-emerald-600" size={20} />
                 </div>
-              <h2 className="text-md font-bold text-emerald-800">
+                <h2 className="font-bold text-emerald-800">
                   Panduan Pengambilan Foto
                 </h2>
               </div>
@@ -215,7 +264,7 @@ export function ScanPage() {
               <ul className="space-y-3">
                 <li className="flex items-center gap-3">
                   <div className="h-9 w-9 rounded-lg bg-emerald-50 flex items-center justify-center shrink-0">
-                  <ZoomIn className="text-emerald-600" size={18} />
+                    <ZoomIn className="text-emerald-600" size={20} />
                   </div>
                   <div className="text-sm text-slate-700">
                     Jarak 15–30 cm dari daun
@@ -223,7 +272,7 @@ export function ScanPage() {
                 </li>
                 <li className="flex items-center gap-3">
                   <div className="h-9 w-9 rounded-lg bg-emerald-50 flex items-center justify-center shrink-0">
-                  <Sun className="text-emerald-600" size={18} />
+                    <Sun className="text-emerald-600" size={20} />
                   </div>
                   <div className="text-sm text-slate-700">
                     Pencahayaan cukup merata
@@ -231,7 +280,7 @@ export function ScanPage() {
                 </li>
                 <li className="flex items-center gap-3">
                   <div className="h-9 w-9 rounded-lg bg-emerald-50 flex items-center justify-center shrink-0">
-                  <AlignCenter className="text-emerald-600" size={18} />
+                    <AlignCenter className="text-emerald-600" size={20} />
                   </div>
                   <div className="text-sm text-slate-700">
                     Posisi daun mengisi bingkai dengan jelas
@@ -239,7 +288,7 @@ export function ScanPage() {
                 </li>
                 <li className="flex items-center gap-3">
                   <div className="h-9 w-9 rounded-lg bg-emerald-50 flex items-center justify-center shrink-0">
-                  <Camera className="text-emerald-600" size={18} />
+                    <Camera className="text-emerald-600" size={20} />
                   </div>
                   <div className="text-sm text-slate-700">
                     Hindari bayangan atau pantulan pada daun & blur pada gambar
@@ -269,11 +318,13 @@ export function ScanPage() {
                   </div>
                 </div>
               </div>
-          </div>
+            </CardContent>
+          </Card>
 
           {/* Card 2: Persyaratan Berkas */}
-          <div className="bg-white rounded-2xl shadow-sm p-5">
+          <Card className="w-full h-max">
-            <h3 className="text-md font-bold text-emerald-800 flex items-center gap-3 mb-4">
+            <CardContent className="px-6 py-4">
+              <h3 className="font-bold text-emerald-800 flex items-center gap-3 mb-4">
                 Persyaratan Berkas
               </h3>
               <div className="flex flex-col gap-2">
@@ -286,7 +337,9 @@ export function ScanPage() {
                   <div
                     key={i}
                     className="flex items-center justify-between py-1.5"
-                  style={{ borderBottom: i < 3 ? "1px solid #f0f0f0" : "none" }}
+                    style={{
+                      borderBottom: i < 3 ? "1px solid #f0f0f0" : "none",
+                    }}
                   >
                     <span
                       className="text-gray-400"
@@ -300,11 +353,12 @@ export function ScanPage() {
                   </div>
                 ))}
               </div>
-          </div>
+            </CardContent>
-        </div>
+          </Card>
+        </aside>
       </div>
 
-      {/* Modal Section */}
+      {/* Result Modal */}
       <Modal
         open={previewOpen}
         onClose={() => {
@@ -429,6 +483,6 @@ export function ScanPage() {
           </div>
         ) : null}
       </Modal>
-    </main>
+    </div>
   );
 }