feat: self-service data upload for PDP, AR, course files (#86)

.gitignore

@@ -183,3 +183,6 @@ operations/convert_institution_id_to_string.py
 operations/verify_institution_id.py
 .vercel
 .env.deploy
+
+# Test upload fixtures (generated — do not commit)
+data/test_uploads/

codebenders-dashboard/app/admin/layout.tsx

@@ -0,0 +1,3 @@
+export default function AdminLayout({ children }: { children: React.ReactNode }) {
+  return <>{children}</>
+}

codebenders-dashboard/app/admin/upload/history/page.tsx

@@ -0,0 +1,181 @@
+"use client"
+
+import { useState, useEffect, useCallback } from "react"
+import { useRouter } from "next/navigation"
+import { Button } from "@/components/ui/button"
+import { Loader2 } from "lucide-react"
+
+interface UploadEntry {
+  id: number
+  userEmail: string
+  filename: string
+  fileType: string
+  rowsInserted: number
+  rowsSkipped: number
+  errorCount: number
+  status: "success" | "partial" | "failed"
+  uploadedAt: string
+}
+
+const FILE_TYPE_COLORS: Record<string, string> = {
+  pdp_cohort_ar: "bg-green-50 text-green-700",
+  pdp_cohort_submission: "bg-green-50 text-green-700",
+  course_ar: "bg-blue-50 text-blue-700",
+  course_submission: "bg-blue-50 text-blue-700",
+  ml_predictions: "bg-purple-50 text-purple-700",
+}
+
+const FILE_TYPE_LABELS: Record<string, string> = {
+  pdp_cohort_ar: "PDP Cohort AR",
+  pdp_cohort_submission: "PDP Cohort Submission",
+  course_ar: "Course AR",
+  course_submission: "Course Submission",
+  ml_predictions: "ML Predictions",
+}
+
+const STATUS_STYLES: Record<string, string> = {
+  success: "bg-green-100 text-green-700",
+  partial: "bg-amber-100 text-amber-700",
+  failed: "bg-red-100 text-red-700",
+}
+
+export default function UploadHistoryPage() {
+  const router = useRouter()
+  const [entries, setEntries] = useState<UploadEntry[]>([])
+  const [total, setTotal] = useState(0)
+  const [page, setPage] = useState(1)
+  const [loading, setLoading] = useState(true)
+  const [statusCounts, setStatusCounts] = useState<Record<string, number>>({})
+  const pageSize = 20
+
+  const fetchHistory = useCallback(async (p: number) => {
+    setLoading(true)
+    try {
+      const res = await fetch(
+        `/api/admin/upload/history?page=${p}&pageSize=${pageSize}`
+      )
+      if (!res.ok) throw new Error(`HTTP ${res.status}`)
+      const data = await res.json()
+      setEntries(data.data ?? [])
+      setTotal(data.total ?? 0)
+      setStatusCounts(data.statusCounts ?? {})
+    } catch {
+      setEntries([])
+      setTotal(0)
+    } finally {
+      setLoading(false)
+    }
+  }, [])
+
+  useEffect(() => {
+    fetchHistory(page)
+  }, [page, fetchHistory])
+
+  const pageCount = Math.ceil(total / pageSize)
+
+  return (
+    <div className="container mx-auto px-4 py-6 max-w-5xl">
+      <div className="flex items-center justify-between mb-6">
+        <div>
+          <h1 className="text-xl font-bold">Upload History</h1>
+          <p className="text-sm text-muted-foreground">
+            All data file uploads by admin and IR users
+          </p>
+        </div>
+        <Button
+          className="bg-purple-600 hover:bg-purple-700"
+          onClick={() => router.push("/admin/upload")}
+        >
+          + New Upload
+        </Button>
+      </div>
+
+      <div className="grid grid-cols-4 gap-3 mb-6">
+        <div className="bg-muted/30 border rounded-lg px-4 py-3">
+          <div className="text-[11px] text-muted-foreground uppercase tracking-wide">Total Uploads</div>
+          <div className="text-2xl font-bold mt-1">{total}</div>
+        </div>
+        <div className="bg-green-50 border border-green-200 rounded-lg px-4 py-3">
+          <div className="text-[11px] text-green-700 uppercase tracking-wide">Successful</div>
+          <div className="text-2xl font-bold text-green-700 mt-1">{statusCounts.success ?? 0}</div>
+        </div>
+        <div className="bg-amber-50 border border-amber-200 rounded-lg px-4 py-3">
+          <div className="text-[11px] text-amber-700 uppercase tracking-wide">Partial</div>
+          <div className="text-2xl font-bold text-amber-700 mt-1">{statusCounts.partial ?? 0}</div>
+        </div>
+        <div className="bg-red-50 border border-red-200 rounded-lg px-4 py-3">
+          <div className="text-[11px] text-red-700 uppercase tracking-wide">Failed</div>
+          <div className="text-2xl font-bold text-red-700 mt-1">{statusCounts.failed ?? 0}</div>
+        </div>
+      </div>
+
+      {loading ? (
+        <div className="flex items-center justify-center py-12 text-muted-foreground">
+          <Loader2 className="h-5 w-5 animate-spin mr-2" /> Loading…
+        </div>
+      ) : entries.length === 0 ? (
+        <div className="text-center py-12 text-muted-foreground text-sm">
+          No uploads yet. Click &quot;+ New Upload&quot; to get started.
+        </div>
+      ) : (
+        <div className="border rounded-lg overflow-hidden">
+          <table className="w-full text-sm">
+            <thead>
+              <tr className="bg-muted">
+                <th className="px-4 py-2.5 text-left font-semibold">File</th>
+                <th className="px-4 py-2.5 text-left font-semibold">Type</th>
+                <th className="px-4 py-2.5 text-right font-semibold">Inserted</th>
+                <th className="px-4 py-2.5 text-right font-semibold">Skipped</th>
+                <th className="px-4 py-2.5 text-right font-semibold">Errors</th>
+                <th className="px-4 py-2.5 text-left font-semibold">Status</th>
+                <th className="px-4 py-2.5 text-left font-semibold">Uploaded By</th>
+                <th className="px-4 py-2.5 text-left font-semibold">Date</th>
+              </tr>
+            </thead>
+            <tbody>
+              {entries.map((e, i) => (
+                <tr key={e.id} className={i % 2 === 1 ? "bg-muted/20" : ""}>
+                  <td className="px-4 py-2.5 font-mono text-xs">{e.filename}</td>
+                  <td className="px-4 py-2.5">
+                    <span className={`text-[11px] px-2 py-0.5 rounded ${FILE_TYPE_COLORS[e.fileType] ?? "bg-muted text-muted-foreground"}`}>
+                      {FILE_TYPE_LABELS[e.fileType] ?? e.fileType}
+                    </span>
+                  </td>
+                  <td className="px-4 py-2.5 text-right font-medium">{e.rowsInserted.toLocaleString()}</td>
+                  <td className="px-4 py-2.5 text-right text-amber-700">{e.rowsSkipped}</td>
+                  <td className="px-4 py-2.5 text-right text-red-700">{e.errorCount}</td>
+                  <td className="px-4 py-2.5">
+                    <span className={`text-[11px] px-2 py-0.5 rounded-full font-medium ${STATUS_STYLES[e.status] ?? ""}`}>
+                      {e.status}
+                    </span>
+                  </td>
+                  <td className="px-4 py-2.5 text-xs text-muted-foreground">{e.userEmail}</td>
+                  <td className="px-4 py-2.5 text-xs text-muted-foreground">{new Date(e.uploadedAt).toLocaleDateString()}</td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      )}
+
+      {pageCount > 1 && (
+        <div className="flex items-center justify-between mt-4 text-xs text-muted-foreground">
+          <span>Showing {(page - 1) * pageSize + 1}–{Math.min(page * pageSize, total)} of {total} uploads</span>
+          <div className="flex gap-1">
+            <button className="border px-2 py-1 rounded disabled:opacity-40" disabled={page <= 1} onClick={() => setPage(page - 1)}>← Prev</button>
+            {Array.from({ length: pageCount }, (_, i) => i + 1).slice(0, 5).map((p) => (
+              <button
+                key={p}
+                className={`px-2 py-1 rounded ${p === page ? "bg-purple-600 text-white" : "border hover:bg-muted"}`}
+                onClick={() => setPage(p)}
+              >
+                {p}
+              </button>
+            ))}
+            <button className="border px-2 py-1 rounded disabled:opacity-40" disabled={page >= pageCount} onClick={() => setPage(page + 1)}>Next →</button>
+          </div>
+        </div>
+      )}
+    </div>
+  )
+}