we do a little exporting

src/physcom_web/routes/admin.py

@@ -2,9 +2,13 @@
 
 from __future__ import annotations
 
-from flask import Blueprint, flash, redirect, render_template, url_for
+import json
+
+from flask import Blueprint, flash, redirect, render_template, request, url_for
+from flask import Response
 
 from physcom.seed.transport_example import load_transport_seed
+from physcom.snapshot import export_snapshot, import_snapshot
 from physcom_web.app import get_repo
 
 bp = Blueprint("admin", __name__, url_prefix="/admin")
@@ -38,14 +42,50 @@ def reseed():
     return redirect(url_for("admin.admin_index"))
 
 
-@bp.route("/wipe-and-reseed", methods=["POST"])
-def wipe_and_reseed():
+@bp.route("/wipe", methods=["POST"])
+def wipe():
     repo = get_repo()
     repo.clear_all()
-    counts = load_transport_seed(repo)
-    total = counts["platforms"] + counts["actuators"] + counts["energy_storages"]
+    flash("Wiped all data.", "success")
+    return redirect(url_for("admin.admin_index"))
+
+
+@bp.route("/snapshot/export")
+def snapshot_export():
+    repo = get_repo()
+    data = export_snapshot(repo)
+    body = json.dumps(data, indent=2)
+    return Response(
+        body,
+        mimetype="application/json",
+        headers={"Content-Disposition": "attachment; filename=physcom_snapshot.json"},
+    )
+
+
+@bp.route("/snapshot/import", methods=["POST"])
+def snapshot_import():
+    repo = get_repo()
+    clear = "clear" in request.form
+
+    file = request.files.get("file")
+    if not file or not file.filename:
+        flash("No file selected.", "error")
+        return redirect(url_for("admin.admin_index"))
+
+    try:
+        raw = file.read().decode("utf-8")
+        data = json.loads(raw)
+    except (UnicodeDecodeError, json.JSONDecodeError) as exc:
+        flash(f"Invalid JSON file: {exc}", "error")
+        return redirect(url_for("admin.admin_index"))
+
+    counts = import_snapshot(repo, data, clear=clear)
+    mode = "Cleared DB and imported" if clear else "Merged"
     flash(
-        f"Wiped all data and reseeded — {total} entities, {counts['domains']} domains.",
+        f"{mode} snapshot — {counts['dimensions']} dimensions, "
+        f"{counts['entities']} entities, {counts['domains']} domains, "
+        f"{counts['combinations']} combinations, {counts['results']} results, "
+        f"{counts['scores']} scores.",
         "success",
     )
     return redirect(url_for("admin.admin_index"))

src/physcom_web/templates/admin/index.html

@@ -37,14 +37,49 @@
   </div>
 
   <div class="card warning-box">
-    <h3>Wipe &amp; Reseed</h3>
+    <h3>Wipe All Data</h3>
     <p class="subtitle">
       Delete <strong>all</strong> data — entities, domains, combinations,
-      pipeline runs — then reload seed data from scratch.
+      pipeline runs. Use Reseed afterwards to restore seed data.
     </p>
-    <form method="post" action="{{ url_for('admin.wipe_and_reseed') }}" style="margin-top: 0.75rem"
-          onsubmit="return confirm('This will permanently delete ALL data and reseed from scratch. Continue?')">
-      <button type="submit" class="btn btn-danger">Wipe &amp; Reseed</button>
+    <form method="post" action="{{ url_for('admin.wipe') }}" style="margin-top: 0.75rem"
+          onsubmit="return confirm('This will permanently delete ALL data. Continue?')">
+      <button type="submit" class="btn btn-danger">Wipe</button>
+    </form>
+  </div>
+</div>
+
+<h2>Snapshots</h2>
+<div class="card-grid">
+  <div class="card">
+    <h3>Export Snapshot</h3>
+    <p class="subtitle">
+      Download the full database state as a JSON file — entities,
+      domains, combinations, results, and scores.
+    </p>
+    <div style="margin-top: 0.75rem">
+      <a href="{{ url_for('admin.snapshot_export') }}" class="btn btn-primary">Download JSON</a>
+    </div>
+  </div>
+
+  <div class="card">
+    <h3>Import Snapshot</h3>
+    <p class="subtitle">
+      Upload a previously exported JSON snapshot. Merge adds new data
+      alongside existing; clear wipes everything first.
+    </p>
+    <form method="post" action="{{ url_for('admin.snapshot_import') }}"
+          enctype="multipart/form-data" style="margin-top: 0.75rem">
+      <div class="form-group">
+        <input type="file" name="file" accept=".json" required>
+      </div>
+      <div style="display: flex; align-items: center; gap: 0.75rem">
+        <button type="submit" class="btn btn-primary">Import (Merge)</button>
+        <button type="submit" name="clear" value="1" class="btn btn-danger"
+                onclick="return confirm('This will wipe ALL existing data before importing. Continue?')">
+          Import (Clear &amp; Replace)
+        </button>
+      </div>
     </form>
   </div>
 </div>