Add wildlife display, species filtering, updated data sources

- Species struct: 13 new wildlife fields (nectar/pollen, bee/butterfly/bird counts, native status)
- Species list: filter dropdowns for plant_layer, nitrogen_fixer, drought_tolerance, native_status
- Species detail: Wildlife & Ecology card with visual nectar/pollen bars, bee counts, native badges
- Data sources page: added NaturaDB, Dreschflegel, Bingenheimer Saatgut
- API: list_species now supports filter query params

herbapi-ui/assets/herbapi.css

@@ -519,6 +519,65 @@ tr:hover td {
     gap: 0.75rem;
 }
 
+/* Filter bar */
+
+.filter-bar {
+    display: flex;
+    align-items: center;
+    flex-wrap: wrap;
+    gap: 0.75rem;
+    margin-bottom: 1rem;
+    padding: 0.6rem 0.85rem;
+    background: var(--bg-card);
+    border: 1px solid var(--border);
+    border-radius: var(--radius);
+}
+
+.filter-group {
+    display: flex;
+    align-items: center;
+    gap: 0.35rem;
+    font-size: 0.85rem;
+    color: var(--text-muted);
+    white-space: nowrap;
+}
+
+.filter-group label {
+    font-size: 0.75rem;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+    font-weight: 600;
+}
+
+.filter-group select {
+    padding: 0.3rem 0.5rem;
+    border: 1px solid var(--border);
+    border-radius: var(--radius);
+    background: var(--bg);
+    font-size: 0.85rem;
+    cursor: pointer;
+}
+
+.filter-group select:focus {
+    outline: none;
+    border-color: var(--accent);
+}
+
+.filter-checkbox label {
+    display: flex;
+    align-items: center;
+    gap: 0.35rem;
+    cursor: pointer;
+    user-select: none;
+}
+
+.filter-checkbox input[type="checkbox"] {
+    accent-color: var(--accent);
+    width: 1rem;
+    height: 1rem;
+    cursor: pointer;
+}
+
 /* Column toggle bar */
 
 .column-toggle {
@@ -927,6 +986,62 @@ td.placeholder {
     opacity: 0.5;
 }
 
+/* Wildlife bars (nectar/pollen 1-4 scale) */
+
+.wildlife-bar-wrap {
+    display: inline-block;
+    width: 80px;
+    height: 10px;
+    background: #e0e0e0;
+    border-radius: 5px;
+    overflow: hidden;
+    vertical-align: middle;
+}
+
+.wildlife-bar {
+    height: 100%;
+    border-radius: 5px;
+    transition: width 0.3s ease;
+}
+
+.wildlife-bar-1 { background: #c8e6c9; }
+.wildlife-bar-2 { background: #81c784; }
+.wildlife-bar-3 { background: #4caf50; }
+.wildlife-bar-4 { background: #2e7d32; }
+
+.wildlife-bar-label {
+    margin-left: 0.5rem;
+    font-size: 0.85rem;
+    font-weight: 500;
+}
+
+/* Native status badges */
+
+.native-badge {
+    display: inline-block;
+    padding: 0.2rem 0.6rem;
+    border-radius: 3px;
+    font-size: 0.8rem;
+    font-weight: 500;
+    background: var(--accent-light);
+    color: var(--text);
+}
+
+.native-badge-heimisch {
+    background: #e8f5e9;
+    color: #2e7d32;
+}
+
+.native-badge-archaeophyt {
+    background: #e3f2fd;
+    color: #1565c0;
+}
+
+.native-badge-neophyt {
+    background: #fff3e0;
+    color: #e65100;
+}
+
 /* Responsive */
 
 @media (max-width: 768px) {