wohnungen: preserve map across HTMX polls, add rejected section, drop €/m²

- #flats-map uses hx-preserve; marker data moved to <script type="application/json">
  sibling that diffs+updates instead of rebuilding Leaflet every poll (fixes
  whitescreen + tiles rendering outside the card)
- upsert_flat backfills lat/lng on existing rows missing coords (older flats
  scraped before the lat/lng migration now appear on the map once alert re-submits)
- collapsible "Abgelehnte Wohnungen" section at the bottom with Wiederherstellen
- remove €/m² column from the list

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/app.py

@@ -404,6 +404,8 @@ def _wohnungen_context(user) -> dict:
         last = db.last_application_for_flat(uid, f["id"])
         flats_view.append({"row": f, "last": last})
 
+    rejected_view = db.rejected_flats(uid)
+
     allowed, reason = _manual_apply_allowed()
     alert_label, alert_chip = _alert_status(notif_row)
     has_running = _has_running_application(uid)
@@ -422,6 +424,7 @@ def _wohnungen_context(user) -> dict:
         })
     return {
         "flats": flats_view,
+        "rejected_flats": rejected_view,
         "map_points": map_points,
         "has_filters": _has_filters(filters_row),
         "alert_label": alert_label,
@@ -548,6 +551,20 @@ async def action_reject(
     return _wohnungen_partial_or_redirect(request, user)
 
 
+@app.post("/actions/unreject")
+async def action_unreject(
+    request: Request,
+    flat_id: str = Form(...),
+    csrf: str = Form(...),
+    user=Depends(require_user),
+):
+    require_csrf(user["id"], csrf)
+    db.unreject_flat(user["id"], flat_id)
+    db.log_audit(user["username"], "flat.unrejected", f"flat_id={flat_id}",
+                 user_id=user["id"], ip=client_ip(request))
+    return _wohnungen_partial_or_redirect(request, user)
+
+
 # ---------------------------------------------------------------------------
 # Tab: Bewerbungen
 # ---------------------------------------------------------------------------

web/db.py

@@ -395,8 +395,17 @@ def update_preferences(user_id: int, data: dict) -> None:
 def upsert_flat(payload: dict) -> bool:
     flat_id = str(payload["id"])
     with _lock:
-        existing = _conn.execute("SELECT id FROM flats WHERE id = ?", (flat_id,)).fetchone()
+        existing = _conn.execute(
+            "SELECT id, lat, lng FROM flats WHERE id = ?", (flat_id,)
+        ).fetchone()
         if existing:
+            # Backfill coords on old rows that pre-date the lat/lng migration.
+            if (existing["lat"] is None or existing["lng"] is None) \
+                    and payload.get("lat") is not None and payload.get("lng") is not None:
+                _conn.execute(
+                    "UPDATE flats SET lat = ?, lng = ? WHERE id = ?",
+                    (payload["lat"], payload["lng"], flat_id),
+                )
             return False
         c = payload.get("connectivity") or {}
         _conn.execute(
@@ -508,6 +517,16 @@ def rejected_flat_ids(user_id: int) -> set[str]:
     return {row["flat_id"] for row in rows}
 
 
+def rejected_flats(user_id: int, limit: int = 200) -> list[sqlite3.Row]:
+    return list(_conn.execute(
+        """SELECT f.*, r.rejected_at
+             FROM flat_rejections r JOIN flats f ON f.id = r.flat_id
+            WHERE r.user_id = ?
+            ORDER BY r.rejected_at DESC LIMIT ?""",
+        (user_id, limit),
+    ).fetchall())
+
+
 def last_application_for_flat(user_id: int, flat_id: str) -> Optional[sqlite3.Row]:
     return _conn.execute(
         """SELECT * FROM applications

web/static/map.js

@@ -1,17 +1,75 @@
-// lazyflat — Leaflet flat map
+// lazyflat — Leaflet flat map.
-// Initialised LAZILY: we only build the Leaflet instance when the container
+//
-// actually has a rendered size (> 0 height). Building it on a hidden 0×0
+// Two important properties:
-// container leaves Leaflet in a state where tiles never load.
+// 1. The map must only be *built* once the container has a real size, because
+//    Leaflet initialised on a hidden 0×0 element never loads its tiles.
+// 2. The `#wohnungen-body` partial is re-swapped by HTMX every few seconds.
+//    To avoid rebuilding Leaflet (and all its tile/marker state) on every
+//    poll — which caused the whitescreen + out-of-frame glitches — the map
+//    container itself is preserved across swaps via `hx-preserve`, and the
+//    marker data is pushed in through a sibling <script id="flats-map-data">
+//    element that DOES get swapped. On each swap we diff markers against the
+//    fresh data and update in place.
 
 let mapInstance = null;
+let markerLayer = null;
+let currentFingerprint = "";
 const BERLIN_CENTER = [52.52, 13.405];
 const BERLIN_ZOOM = 11;
 
-function buildMap(el) {
+function readMapData() {
-  if (mapInstance) {
+  const script = document.getElementById("flats-map-data");
-    try { mapInstance.remove(); } catch (e) {}
+  if (!script) return [];
-    mapInstance = null;
+  try {
+    const data = JSON.parse(script.textContent || "[]");
+    return Array.isArray(data) ? data : [];
+  } catch (e) {
+    return [];
   }
+}
+
+function fingerprintOf(data) {
+  return data
+    .map((f) => `${f.lat},${f.lng},${f.address || ""},${f.rent || ""}`)
+    .join("|");
+}
+
+function renderMarkers(data) {
+  if (!mapInstance) return;
+  const fp = fingerprintOf(data);
+  if (fp === currentFingerprint) return;
+  currentFingerprint = fp;
+
+  if (markerLayer) {
+    markerLayer.clearLayers();
+  } else {
+    markerLayer = L.layerGroup().addTo(mapInstance);
+  }
+
+  const bounds = [];
+  data.forEach((f) => {
+    if (typeof f.lat !== "number" || typeof f.lng !== "number") return;
+    const rent = f.rent ? Math.round(f.rent) + " €" : "";
+    const rooms = f.rooms ? f.rooms + " Zi" : "";
+    const size = f.size ? Math.round(f.size) + " m²" : "";
+    const meta = [rooms, size, rent].filter(Boolean).join(" · ");
+    const safeAddr = (f.address || "").replace(/</g, "&lt;");
+    const safeLink = (f.link || "#").replace(/"/g, "&quot;");
+    L.marker([f.lat, f.lng]).addTo(markerLayer).bindPopup(
+      `<b>${safeAddr}</b>` + (meta ? `<br>${meta}` : "") +
+      `<br><a href="${safeLink}" target="_blank" rel="noopener">Zur Anzeige →</a>`,
+    );
+    bounds.push([f.lat, f.lng]);
+  });
+
+  if (bounds.length === 1) {
+    mapInstance.setView(bounds[0], 14);
+  } else if (bounds.length > 1) {
+    mapInstance.fitBounds(bounds, { padding: [30, 30] });
+  }
+}
+
+function buildMap(el) {
   mapInstance = L.map(el, {
     zoomControl: false,
     scrollWheelZoom: false,
@@ -25,45 +83,30 @@ function buildMap(el) {
     maxZoom: 18,
     subdomains: "abc",
   }).addTo(mapInstance);
-
+  markerLayer = L.layerGroup().addTo(mapInstance);
-  let data = [];
-  try { data = JSON.parse(el.dataset.flats || "[]"); } catch (e) {}
-  const bounds = [];
-  data.forEach((f) => {
-    if (typeof f.lat !== "number" || typeof f.lng !== "number") return;
-    const rent = f.rent ? Math.round(f.rent) + " €" : "";
-    const rooms = f.rooms ? f.rooms + " Zi" : "";
-    const size = f.size ? Math.round(f.size) + " m²" : "";
-    const meta = [rooms, size, rent].filter(Boolean).join(" · ");
-    const safeAddr = (f.address || "").replace(/</g, "&lt;");
-    const safeLink = (f.link || "#").replace(/"/g, "&quot;");
-    L.marker([f.lat, f.lng]).addTo(mapInstance).bindPopup(
-      `<b>${safeAddr}</b>` + (meta ? `<br>${meta}` : "") +
-      `<br><a href="${safeLink}" target="_blank" rel="noopener">Zur Anzeige →</a>`,
-    );
-    bounds.push([f.lat, f.lng]);
-  });
-  if (bounds.length === 1) {
-    mapInstance.setView(bounds[0], 14);
-  } else if (bounds.length > 1) {
-    mapInstance.fitBounds(bounds, { padding: [30, 30] });
-  }
 }
 
 function ensureMap() {
   const el = document.getElementById("flats-map");
   if (!el || typeof L === "undefined") return;
 
-  // Container not actually visible yet → bail, we'll retry when the view toggles.
+  // Hidden (0×0) container → tiles would never load; retry after view toggle.
   if (el.clientHeight < 10) return;
 
-  // Existing instance bound to THIS element → just recheck size.
+  if (!mapInstance) {
-  if (mapInstance && mapInstance._container === el) {
-    try { mapInstance.invalidateSize(); } catch (e) {}
-    return;
-  }
-
     buildMap(el);
+  } else if (mapInstance._container !== el) {
+    // Container node changed (shouldn't happen thanks to hx-preserve, but
+    // defensive: rebuild so Leaflet rebinds to the live element).
+    try { mapInstance.remove(); } catch (e) {}
+    mapInstance = null;
+    markerLayer = null;
+    currentFingerprint = "";
+    buildMap(el);
+  } else {
+    try { mapInstance.invalidateSize(); } catch (e) {}
+  }
+  renderMarkers(readMapData());
 }
 
 function wireViewToggle() {
@@ -72,9 +115,7 @@ function wireViewToggle() {
     r.dataset.wired = "1";
     r.addEventListener("change", (e) => {
       try { localStorage.setItem("lazyflat_view_mode", e.target.value); } catch (err) {}
-      // Wait for CSS :has() to reflow, then build/size the map.
       requestAnimationFrame(() => requestAnimationFrame(ensureMap));
-      // belt & suspenders — re-check a couple more times in case of layout shifts.
       setTimeout(ensureMap, 120);
       setTimeout(ensureMap, 400);
     });
@@ -88,7 +129,6 @@ function restoreView() {
   const el = document.querySelector(`input[name="view_mode"][value="${stored}"]`);
   if (el && !el.checked) {
     el.checked = true;
-    // Manually dispatching change would bubble and double-fire; call directly.
     requestAnimationFrame(() => requestAnimationFrame(ensureMap));
     setTimeout(ensureMap, 120);
     setTimeout(ensureMap, 400);
@@ -98,7 +138,7 @@ function restoreView() {
 function onReady() {
   wireViewToggle();
   restoreView();
-  ensureMap();  // handles the case where map view is already visible
+  ensureMap();
 }
 
 document.addEventListener("DOMContentLoaded", onReady);

web/templates/_wohnungen_body.html

@@ -96,12 +96,13 @@
     </div>
 </section>
 
-<!-- Karte -->
+<!-- Karte (Leaflet-Container bleibt über HTMX-Swaps hinweg erhalten) -->
 <section class="view-map">
     <div class="card p-3">
-        <div id="flats-map" data-flats='{{ map_points | tojson }}'></div>
+        <div id="flats-map" hx-preserve="true"></div>
     </div>
 </section>
+<script id="flats-map-data" type="application/json">{{ map_points | tojson }}</script>
 
 <!-- Liste -->
 <section class="view-list card">
@@ -124,7 +125,6 @@
                     {% if f.rooms %}{{ "%.1f"|format(f.rooms) }} Z{% endif %}
                     {% if f.size %} · {{ "%.0f"|format(f.size) }} m²{% endif %}
                     {% if f.total_rent %} · {{ "%.0f"|format(f.total_rent) }} €{% endif %}
-                    {% if f.sqm_price %} ({{ "%.2f"|format(f.sqm_price) }} €/m²){% endif %}
                     {% if f.connectivity_morning_time %} · {{ "%.0f"|format(f.connectivity_morning_time) }} min morgens{% endif %}
                     {% if f.wbs %} · WBS: {{ f.wbs }}{% endif %}
                     · entdeckt <span data-rel-utc="{{ f.discovered_at|iso_utc }}" title="{{ f.discovered_at|de_dt }}">…</span>
@@ -170,4 +170,38 @@
     </div>
 </section>
 
+{% if rejected_flats %}
+<section class="card">
+    <details class="group">
+        <summary class="px-4 py-3 text-sm font-medium flex items-center justify-between cursor-pointer">
+            <span>Abgelehnte Wohnungen</span>
+            <span class="text-xs text-slate-500">{{ rejected_flats|length }}</span>
+        </summary>
+        <div class="divide-y divide-soft border-t border-soft">
+            {% for f in rejected_flats %}
+            <div class="px-4 py-3 flex flex-col md:flex-row md:items-center gap-3">
+                <div class="flex-1 min-w-0">
+                    <a class="font-medium truncate" href="{{ f.link }}" target="_blank" rel="noopener noreferrer">
+                        {{ f.address or f.link }}
+                    </a>
+                    <div class="text-xs text-slate-500 mt-0.5">
+                        {% if f.rooms %}{{ "%.1f"|format(f.rooms) }} Z{% endif %}
+                        {% if f.size %} · {{ "%.0f"|format(f.size) }} m²{% endif %}
+                        {% if f.total_rent %} · {{ "%.0f"|format(f.total_rent) }} €{% endif %}
+                        · abgelehnt <span data-rel-utc="{{ f.rejected_at|iso_utc }}" title="{{ f.rejected_at|de_dt }}">…</span>
+                    </div>
+                </div>
+                <form method="post" action="/actions/unreject"
+                      hx-post="/actions/unreject" hx-target="#wohnungen-body" hx-swap="outerHTML">
+                    <input type="hidden" name="csrf" value="{{ csrf }}">
+                    <input type="hidden" name="flat_id" value="{{ f.id }}">
+                    <button class="btn btn-ghost text-sm" type="submit">Wiederherstellen</button>
+                </form>
+            </div>
+            {% endfor %}
+        </div>
+    </details>
+</section>
+{% endif %}
+
 </div>