feat(measure): rework workflow operatore — AVVIA, capoturno, fine ciclo, blocco logout

- task_list: pulsante AVVIA sequenziale + rinomina "Inizia Misure" → "Visualizza Task"
- task_execute header: aggiunti "Lista task", "Riepilogo", "Fermo linea", "Fine Produzione"
- task_execute footer: "Fine ciclo misura" (attivo quando tutte le quote misurate) + "Completato"
- Rimosso auto-advance al task successivo, flusso ora esplicito via Completato
- Misura fuori tolleranza: blocco avanzamento + modale login capoturno (validate_supervisor)
- Blocco logout durante misurazioni attive (icona lucchetto su task_execute)

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

src/frontend/flask_app/blueprints/measure.py

@@ -321,6 +321,33 @@ def save_measurement():
     return jsonify(resp), 201
 
 
+# ---------------------------------------------------------------------------
+# Route: Validate supervisor credentials (AJAX)
+# ---------------------------------------------------------------------------
+@measure_bp.route("/validate-supervisor", methods=["POST"])
+@login_required
+@role_required("MeasurementTec")
+def validate_supervisor():
+    """Validate supervisor (capoturno) credentials for out-of-tolerance authorization."""
+    data = request.get_json(silent=True) or {}
+    username = data.get("username", "").strip()
+    password = data.get("password", "")
+
+    if not username or not password:
+        return jsonify({"error": True, "detail": "Username e password richiesti"}), 400
+
+    resp = api_client.post("/api/auth/login", data={"username": username, "password": password})
+
+    if resp.get("error"):
+        return jsonify({"error": True, "detail": "Credenziali non valide"}), 401
+
+    user = resp.get("user", {})
+    if not user.get("is_admin"):
+        return jsonify({"error": True, "detail": "Utente non autorizzato (richiesto capoturno)"}), 403
+
+    return jsonify({"authorized": True, "supervisor": user.get("display_name", username)}), 200
+
+
 # ---------------------------------------------------------------------------
 # Route: File proxy (browser can't send X-API-Key directly)
 # ---------------------------------------------------------------------------

src/frontend/flask_app/templates/components/navbar.html

@@ -213,6 +213,15 @@
 
             <div class="border-t border-[var(--border-color)] my-1"></div>
 
+            {% if request.endpoint == 'measure.task_execute' %}
+            <span class="flex items-center gap-2.5 px-4 py-2.5 text-sm text-[var(--text-muted)] opacity-50 cursor-not-allowed"
+                  title="{{ _('Logout bloccato durante le misurazioni') }}">
+              <svg class="w-4 h-4" fill="none" stroke="currentColor" stroke-width="1.75" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z"/>
+              </svg>
+              {{ _('Logout') }}
+            </span>
+            {% else %}
             <a href="{{ url_for('auth.logout') }}"
                class="flex items-center gap-2.5 px-4 py-2.5 text-sm text-measure-fail
                       hover:bg-red-50 dark:hover:bg-red-900/20 transition-colors">
@@ -221,6 +230,7 @@
               </svg>
               {{ _('Logout') }}
             </a>
+            {% endif %}
           </div>
         </div>
         {% endif %}

src/frontend/flask_app/templates/measure/task_execute.html

@@ -84,7 +84,7 @@
       </a>
 
       {# Task badge + title #}
-      <div class="flex items-center gap-2 min-w-0 flex-1">
+      <div class="flex items-center gap-2 min-w-0">
         <span class="shrink-0 inline-flex items-center px-2 py-0.5 rounded text-xs font-bold
                      bg-primary-50 dark:bg-primary-900/30 text-primary-700 dark:text-primary-300
                      border border-primary-200 dark:border-primary-800">
@@ -95,6 +95,45 @@
         </h1>
       </div>
 
+      {# Lista task + Riepilogo buttons #}
+      <div class="shrink-0 flex items-center gap-1.5">
+        <a href="{{ url_for('measure.task_list', recipe_id=task.recipe_id or 0) }}"
+           class="btn btn-secondary text-xs py-1 px-2.5 gap-1">
+          <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" d="M4 6h16M4 10h16M4 14h16M4 18h16"/>
+          </svg>
+          {{ _('Lista task') }}
+        </a>
+        <button @click="goToSummary()"
+                class="btn btn-secondary text-xs py-1 px-2.5 gap-1">
+          <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" d="M9 17v-2m3 2v-4m3 4v-6m2 10H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/>
+          </svg>
+          {{ _('Riepilogo') }}
+        </button>
+      </div>
+
+      {# Fermo linea + Fine produzione (measurement tasks only) #}
+      <template x-if="subtasks.length > 0">
+        <div class="shrink-0 flex items-center gap-1.5">
+          <button @click="showSupervisorModal = true; supervisorAction = 'fermo_linea'"
+                  class="btn text-xs py-1 px-2.5 gap-1 border-2 border-amber-500 text-amber-700 dark:text-amber-300 bg-amber-50 dark:bg-amber-900/20 hover:bg-amber-100 dark:hover:bg-amber-900/40">
+            <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" d="M10 9v6m4-6v6m7-3a9 9 0 11-18 0 9 9 0 0118 0z"/>
+            </svg>
+            {{ _('Fermo linea') }}
+          </button>
+          <button @click="showSupervisorModal = true; supervisorAction = 'fine_produzione'"
+                  class="btn text-xs py-1 px-2.5 gap-1 border-2 border-red-500 text-red-700 dark:text-red-300 bg-red-50 dark:bg-red-900/20 hover:bg-red-100 dark:hover:bg-red-900/40">
+            <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" d="M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/>
+              <path stroke-linecap="round" stroke-linejoin="round" d="M9 10a1 1 0 011-1h4a1 1 0 011 1v4a1 1 0 01-1 1h-4a1 1 0 01-1-1v-4z"/>
+            </svg>
+            {{ _('Fine Produzione') }}
+          </button>
+        </div>
+      </template>
+
       {# Lot + Serial badges #}
       <div class="shrink-0 flex items-center gap-2">
         {% if lot_number %}
@@ -397,19 +436,47 @@
               x-text="Math.round(progressPercent) + '%'"></span>
       </div>
 
-      {# Right: Summary button #}
+      {# Right: Fine ciclo misura (measurement tasks) / Completato (non-measurement or after cycle) #}
-      <button x-show="isComplete"
+      <template x-if="subtasks.length > 0">
-              x-transition
+        <div class="flex items-center gap-1.5">
-              @click="goToSummary()"
+          <button x-show="isComplete && !cycleConfirmed"
-              class="btn btn-primary text-xs shrink-0 gap-1 py-1.5 px-2.5 shadow-md">
+                  x-transition
-        <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+                  @click="confirmCycle()"
-          <path stroke-linecap="round" stroke-linejoin="round" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"/>
+                  class="btn text-xs shrink-0 gap-1 py-1.5 px-3 shadow-md
-        </svg>
+                         bg-primary text-white hover:bg-primary-700">
-        {{ _('Riepilogo') }}
+            <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
-        <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"/>
-          <path stroke-linecap="round" stroke-linejoin="round" d="M14 5l7 7m0 0l-7 7m7-7H3"/>
+            </svg>
-        </svg>
+            {{ _('Fine ciclo misura') }}
-      </button>
+          </button>
+          <button x-show="cycleConfirmed"
+                  x-transition
+                  @click="goToNextTask()"
+                  class="btn text-xs shrink-0 gap-1 py-1.5 px-3 shadow-md
+                         bg-measure-pass text-white hover:opacity-90">
+            <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" d="M5 13l4 4L19 7"/>
+            </svg>
+            {{ _('Completato') }}
+            <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" d="M14 5l7 7m0 0l-7 7m7-7H3"/>
+            </svg>
+          </button>
+        </div>
+      </template>
+      <template x-if="subtasks.length === 0">
+        <button @click="goToNextTask()"
+                class="btn text-xs shrink-0 gap-1 py-1.5 px-3 shadow-md
+                       bg-measure-pass text-white hover:opacity-90">
+          <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" d="M5 13l4 4L19 7"/>
+          </svg>
+          {{ _('Completato') }}
+          <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" d="M14 5l7 7m0 0l-7 7m7-7H3"/>
+          </svg>
+        </button>
+      </template>
     </div>
   </div>
 
@@ -456,13 +523,77 @@
         </div>
       </div>
 
-      <button @click="goToSummary()"
+      <div class="flex gap-2">
-              class="btn btn-primary w-full justify-center gap-2">
+        <button @click="goToSummary()"
-        {{ _('Vai al Riepilogo') }}
+                class="btn btn-secondary flex-1 justify-center gap-2">
-        <svg class="w-4 h-4" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+          {{ _('Riepilogo') }}
-          <path stroke-linecap="round" stroke-linejoin="round" d="M14 5l7 7m0 0l-7 7m7-7H3"/>
+        </button>
-        </svg>
+        <button @click="showCompletionOverlay = false; cycleConfirmed = true"
-      </button>
+                class="btn btn-primary flex-1 justify-center gap-2">
+          {{ _('Conferma ciclo') }}
+          <svg class="w-4 h-4" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" d="M5 13l4 4L19 7"/>
+          </svg>
+        </button>
+      </div>
+    </div>
+  </div>
+
+  {# ================================================================
+     SUPERVISOR LOGIN MODAL
+     ================================================================ #}
+  <div x-show="showSupervisorModal"
+       x-transition:enter="transition ease-out duration-200"
+       x-transition:enter-start="opacity-0"
+       x-transition:enter-end="opacity-100"
+       x-transition:leave="transition ease-in duration-150"
+       x-transition:leave-start="opacity-100"
+       x-transition:leave-end="opacity-0"
+       x-cloak
+       class="fixed inset-0 z-[60] flex items-center justify-center bg-black/50 backdrop-blur-sm"
+       @click.self="showSupervisorModal = false">
+    <div class="bg-[var(--bg-card)] rounded-2xl shadow-2xl p-6 max-w-sm mx-4 w-full border border-[var(--border-color)]">
+      <div class="flex items-center gap-3 mb-4">
+        <div class="w-10 h-10 rounded-full bg-amber-100 dark:bg-amber-900/30 flex items-center justify-center">
+          <svg class="w-5 h-5 text-amber-600" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z"/>
+          </svg>
+        </div>
+        <div>
+          <h3 class="text-lg font-bold text-[var(--text-primary)]">{{ _('Autorizzazione capoturno') }}</h3>
+          <p class="text-xs text-[var(--text-secondary)]" x-text="supervisorReason"></p>
+        </div>
+      </div>
+
+      <div class="space-y-3 mb-5">
+        <div>
+          <label class="tmf-label text-xs">{{ _('Username') }}</label>
+          <input type="text" x-model="supervisorUsername" class="tmf-input text-sm"
+                 placeholder="{{ _('Username capoturno') }}" @keydown.enter="validateSupervisor()">
+        </div>
+        <div>
+          <label class="tmf-label text-xs">{{ _('Password') }}</label>
+          <input type="password" x-model="supervisorPassword" class="tmf-input text-sm"
+                 placeholder="••••••••" @keydown.enter="validateSupervisor()">
+        </div>
+        <p x-show="supervisorError" class="text-xs text-red-600" x-text="supervisorError"></p>
+      </div>
+
+      <div class="flex gap-2">
+        <button @click="showSupervisorModal = false; supervisorUsername = ''; supervisorPassword = ''; supervisorError = ''"
+                class="btn btn-secondary flex-1 text-sm">
+          {{ _('Annulla') }}
+        </button>
+        <button @click="validateSupervisor()"
+                :disabled="!supervisorUsername || !supervisorPassword || supervisorValidating"
+                class="btn btn-primary flex-1 text-sm gap-1">
+          <svg x-show="supervisorValidating" class="w-4 h-4 animate-spin" fill="none" viewBox="0 0 24 24">
+            <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"/>
+            <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8v4a4 4 0 00-4 4H4z"/>
+          </svg>
+          {{ _('Autorizza') }}
+        </button>
+      </div>
     </div>
   </div>
 
@@ -498,6 +629,16 @@ function taskExecute() {
     errorMessage: '',
     showCompletionOverlay: false,
 
+    // ---- Cycle & workflow state ----
+    cycleConfirmed: false,
+    showSupervisorModal: false,
+    supervisorAction: '',       // 'out_of_tolerance', 'fermo_linea', 'fine_produzione'
+    supervisorUsername: '',
+    supervisorPassword: '',
+    supervisorError: '',
+    supervisorValidating: false,
+    pendingAdvance: false,
+
     // ---- Value from numpad / caliper ----
     currentValue: null,
 
@@ -650,15 +791,17 @@ function taskExecute() {
         // Pause to show result feedback
         await new Promise(r => setTimeout(r, 1000));
 
-        // Check if all done
+        // Out-of-tolerance: block advancement, require supervisor
+        if (pf === 'fail') {
+          this.pendingAdvance = true;
+          this.supervisorAction = 'out_of_tolerance';
+          this.showSupervisorModal = true;
+          return;
+        }
+
+        // Check if all done — show overlay but do NOT auto-navigate
         if (this.completedCount >= this.totalSubtasks) {
-          const taskIds = window.__allTaskIds || [];
+          this.showCompletionOverlay = true;
-          const currentIdx = taskIds.indexOf(this.task.id);
-          if (currentIdx >= 0 && currentIdx < taskIds.length - 1) {
-            window.location.href = '{{ url_for("measure.task_execute", task_id=0) }}'.replace('/0', '/' + taskIds[currentIdx + 1]);
-          } else {
-            this.showCompletionOverlay = true;
-          }
           return;
         }
 
@@ -705,6 +848,73 @@ function taskExecute() {
       }
     },
 
+    // ---- Confirm measurement cycle (Fine ciclo misura) ----
+    confirmCycle() {
+      this.cycleConfirmed = true;
+      this.showCompletionOverlay = false;
+    },
+
+    // ---- Navigate to next task (Completato) ----
+    goToNextTask() {
+      const taskIds = window.__allTaskIds || [];
+      const currentIdx = taskIds.indexOf(this.task.id);
+      if (currentIdx >= 0 && currentIdx < taskIds.length - 1) {
+        window.location.href = '{{ url_for("measure.task_execute", task_id=0) }}'.replace('/0', '/' + taskIds[currentIdx + 1]);
+      } else {
+        this.goToSummary();
+      }
+    },
+
+    // ---- Supervisor reason text ----
+    get supervisorReason() {
+      if (this.supervisorAction === 'out_of_tolerance') return '{{ _("Misurazione fuori tolleranza") }}';
+      if (this.supervisorAction === 'fermo_linea') return '{{ _("Fermo linea richiesto") }}';
+      if (this.supervisorAction === 'fine_produzione') return '{{ _("Fine produzione richiesta") }}';
+      return '';
+    },
+
+    // ---- Validate supervisor credentials ----
+    async validateSupervisor() {
+      this.supervisorError = '';
+      this.supervisorValidating = true;
+
+      try {
+        const csrfToken = document.querySelector('meta[name=csrf-token]')?.content || '';
+        const resp = await fetch('{{ url_for("measure.validate_supervisor") }}', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json', 'X-CSRFToken': csrfToken },
+          body: JSON.stringify({ username: this.supervisorUsername, password: this.supervisorPassword })
+        });
+        const data = await resp.json();
+
+        if (!resp.ok || data.error) {
+          this.supervisorError = data.detail || '{{ _("Credenziali non valide o utente non autorizzato") }}';
+          this.supervisorValidating = false;
+          return;
+        }
+
+        // Authorized — close modal and proceed
+        this.showSupervisorModal = false;
+        this.supervisorUsername = '';
+        this.supervisorPassword = '';
+        this.supervisorValidating = false;
+
+        if (this.supervisorAction === 'out_of_tolerance') {
+          this.pendingAdvance = false;
+          if (this.completedCount >= this.totalSubtasks) {
+            this.showCompletionOverlay = true;
+          } else {
+            this.advanceToNext();
+          }
+        }
+        // fermo_linea and fine_produzione are handled by GAIA integration (future)
+
+      } catch (err) {
+        this.supervisorError = '{{ _("Errore di connessione") }}';
+        this.supervisorValidating = false;
+      }
+    },
+
     // ---- Go to summary ----
     goToSummary() {
       const recipeId = this.task.recipe_id || 0;

src/frontend/flask_app/templates/measure/task_list.html

@@ -60,8 +60,19 @@
           {% endif %}
         </div>
 
-        <!-- Right: Traceability Badges -->
+        <!-- Right: AVVIA + Traceability -->
-        <div class="flex flex-col gap-2 sm:items-end shrink-0">
+        <div class="flex flex-col gap-3 sm:items-end shrink-0">
+          {% if tasks %}
+          <a href="{{ url_for('measure.task_execute', task_id=tasks[0].id) }}"
+             class="btn gap-3 w-full sm:w-auto justify-center text-lg font-bold
+                    bg-red-600 hover:bg-red-700 text-white shadow-lg hover:shadow-xl
+                    px-8 py-3 rounded-xl transition-all duration-200">
+            <svg class="w-6 h-6" fill="none" stroke="currentColor" stroke-width="2.5" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" d="M5 3l14 9-14 9V3z"/>
+            </svg>
+            {{ _('AVVIA') }}
+          </a>
+          {% endif %}
           {% if lot_number %}
           <div class="inline-flex items-center gap-2 px-3 py-1.5 rounded-lg text-sm
                       bg-amber-50 dark:bg-amber-900/20 border border-amber-200 dark:border-amber-800
@@ -185,7 +196,7 @@
                 <path stroke-linecap="round" stroke-linejoin="round" d="M14.752 11.168l-3.197-2.132A1 1 0 0010 9.87v4.263a1 1 0 001.555.832l3.197-2.132a1 1 0 000-1.664z"/>
                 <path stroke-linecap="round" stroke-linejoin="round" d="M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/>
               </svg>
-              {{ _('Inizia Misure') }}
+              {{ _('Visualizza Task') }}
               <svg class="w-4 h-4 transition-transform group-hover:translate-x-0.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" d="M9 5l7 7-7 7"/>
               </svg>

src/frontend/flask_app/translations/en/LC_MESSAGES/messages.po

@@ -699,6 +699,54 @@ msgstr "Save settings"
 msgid "Salvato"
 msgstr "Saved"
 
+msgid "AVVIA"
+msgstr "START"
+
+msgid "Visualizza Task"
+msgstr "View Task"
+
+msgid "Lista task"
+msgstr "Task list"
+
+msgid "Fermo linea"
+msgstr "Line stop"
+
+msgid "Fine Produzione"
+msgstr "End Production"
+
+msgid "Fine ciclo misura"
+msgstr "End measurement cycle"
+
+msgid "Completato"
+msgstr "Completed"
+
+msgid "Conferma ciclo"
+msgstr "Confirm cycle"
+
+msgid "Autorizzazione capoturno"
+msgstr "Supervisor authorization"
+
+msgid "Misurazione fuori tolleranza"
+msgstr "Measurement out of tolerance"
+
+msgid "Fermo linea richiesto"
+msgstr "Line stop requested"
+
+msgid "Fine produzione richiesta"
+msgstr "End of production requested"
+
+msgid "Username capoturno"
+msgstr "Supervisor username"
+
+msgid "Credenziali non valide o utente non autorizzato"
+msgstr "Invalid credentials or unauthorized user"
+
+msgid "Autorizza"
+msgstr "Authorize"
+
+msgid "Logout bloccato durante le misurazioni"
+msgstr "Logout blocked during measurements"
+
 msgid "Sessione in scadenza"
 msgstr "Session expiring"
 

src/frontend/flask_app/translations/it/LC_MESSAGES/messages.po

@@ -729,6 +729,54 @@ msgstr "Salva impostazioni"
 msgid "Salvato"
 msgstr "Salvato"
 
+msgid "AVVIA"
+msgstr "AVVIA"
+
+msgid "Visualizza Task"
+msgstr "Visualizza Task"
+
+msgid "Lista task"
+msgstr "Lista task"
+
+msgid "Fermo linea"
+msgstr "Fermo linea"
+
+msgid "Fine Produzione"
+msgstr "Fine Produzione"
+
+msgid "Fine ciclo misura"
+msgstr "Fine ciclo misura"
+
+msgid "Completato"
+msgstr "Completato"
+
+msgid "Conferma ciclo"
+msgstr "Conferma ciclo"
+
+msgid "Autorizzazione capoturno"
+msgstr "Autorizzazione capoturno"
+
+msgid "Misurazione fuori tolleranza"
+msgstr "Misurazione fuori tolleranza"
+
+msgid "Fermo linea richiesto"
+msgstr "Fermo linea richiesto"
+
+msgid "Fine produzione richiesta"
+msgstr "Fine produzione richiesta"
+
+msgid "Username capoturno"
+msgstr "Username capoturno"
+
+msgid "Credenziali non valide o utente non autorizzato"
+msgstr "Credenziali non valide o utente non autorizzato"
+
+msgid "Autorizza"
+msgstr "Autorizza"
+
+msgid "Logout bloccato durante le misurazioni"
+msgstr "Logout bloccato durante le misurazioni"
+
 msgid "Sessione in scadenza"
 msgstr "Sessione in scadenza"