Assign sequential pod IDs from the master with NVS-stable bindings.

Replaces MAC-byte self-IDs with master allocation (1–255), slave preferred-ID reconnect, debug reset via UART/UI, and rate-limited ASSIGN to avoid ESP-NOW NO_MEM storms.

Co-authored-by: Cursor <cursoragent@cursor.com>

goTool/webui/index.html

@@ -540,6 +540,12 @@
                       title="Master-Tap-Config an alle Slaves (ESP-NOW)">
                 Tap-Cfg alle
               </button>
+              <button type="button" class="btn btn-outline-danger btn-sm"
+                      @click="resetClientIdMap()"
+                      :disabled="busy || !hostUp()"
+                      title="NVS-ID-Map + Live-Registry leeren; Online-Slaves verlieren Binding">
+                ID-Map leeren
+              </button>
               <span class="badge bg-secondary" x-text="(state.clients || []).length + ' registered'"></span>
             </div>
           </div>
@@ -1957,6 +1963,26 @@
             this.busy = false;
           }
         },
+        async resetClientIdMap() {
+          if (!confirm('ID-Map leeren? Master vergisst alle MAC→ID-Zuordnungen; Online-Slaves verlieren ihr Binding.')) {
+            return;
+          }
+          this.busy = true;
+          try {
+            const r = await fetch('/api/clients/reset-id-map', { method: 'POST' });
+            const data = await r.json();
+            if (!r.ok || !data.success) {
+              this.flash(data.error || 'ID-Map leeren fehlgeschlagen', false);
+              return;
+            }
+            this.state = { ...this.state, clients: [] };
+            this.flash('ID-Map geleert — Slaves melden sich neu an', true);
+          } catch (e) {
+            this.flash(String(e), false);
+          } finally {
+            this.busy = false;
+          }
+        },
         async restart(clientId = 0) {
           this.busy = true;
           try {