feat: sidebar CTA removal, delete phase/task, public dashboard UX, chat panel

1. AdminSidebar: removed yellow "Genera preventivo" CTA (duplicated Preventivi tab nav item)
2. Delete phase/task: new deletePhase/deleteTask server actions with FK cascade and phase-status recompute; DeletePhaseTaskButton client component with window.confirm; trash icons in PhasesTab per phase and per task
3. Public dashboard: extend activeOffers query with offer_macros join (offer_name, offer_type); reorder sidebar 1°Offerte 2°Pagamenti 3°Documenti; OffersSection shows macro public_name as heading (never tier letter/internal_name); PaymentStatus gains totalLabel/overrideAmount/hideRows props — retainer=monthly label + no Acconto/Saldo rows
4. Offer editor: Descrizione textarea (nota interna) and Modalità toggle moved directly under title; Tags section now contains only Categoria/Ticket/Tipo/Obiettivo
5. Basecamp chat: API route supports entity_type="phase" with authorization scoping; comments scope in client-view broadened to include phaseIds and client_id (general); CommentsTab updated with phase/general entities; ChatProvider React context; ChatPanel fixed slide-in panel with FAB (bottom-right) and composer tag selector (Generale + phases); PhaseCard gets chat-bubble icon pre-tagging that phase; inline ChatSection block removed from dashboard main column

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/admin/offers/OfferEditorClient.tsx

@@ -296,6 +296,42 @@ export function OfferEditorClient({
             />
           </h3>
         </div>
+
+        {/* Modalità toggle — directly under title */}
+        <div className="mt-3 flex items-center gap-3">
+          <span className="text-xs text-[#71717a] w-24 shrink-0">Modalità</span>
+          <div className="inline-flex rounded-lg border border-[#e5e7eb] bg-[#fafafa] p-0.5">
+            {([
+              { value: "una_tantum", label: "Una tantum" },
+              { value: "retainer", label: "Retainer" },
+            ] as const).map((opt) => (
+              <button
+                key={opt.value}
+                type="button"
+                onClick={() => updateMacro("offer_type", opt.value)}
+                className={`px-3 py-1 text-sm rounded-md transition-colors ${
+                  macro.offer_type === opt.value
+                    ? "bg-[#1A463C] text-white font-medium"
+                    : "text-[#71717a] hover:text-[#1a1a1a]"
+                }`}
+              >
+                {opt.label}
+              </button>
+            ))}
+          </div>
+        </div>
+
+        {/* Descrizione — nota interna, non visibile al cliente */}
+        <div className="mt-3 flex items-start gap-3">
+          <span className="text-xs text-[#71717a] w-24 shrink-0 pt-2">Descrizione</span>
+          <textarea
+            value={macro.description}
+            onChange={(e) => updateMacro("description", e.target.value)}
+            placeholder="Descrizione interna dell'offerta (non visibile al cliente)..."
+            rows={3}
+            className="flex-1 text-sm border border-[#e5e7eb] rounded-lg px-3 py-2 bg-white resize-none focus:outline-none focus:ring-2 focus:ring-[#1A463C]/30 text-[#1a1a1a] placeholder:text-[#aaaaaa]"
+          />
+        </div>
       </div>
 
       {/* Tags block */}
@@ -324,29 +360,6 @@ export function OfferEditorClient({
           />
         </div>
 
-        <div className="flex items-center gap-3">
-          <span className="text-xs text-[#71717a] w-24 shrink-0">Modalità</span>
-          <div className="inline-flex rounded-lg border border-[#e5e7eb] bg-[#fafafa] p-0.5">
-            {([
-              { value: "una_tantum", label: "Una tantum" },
-              { value: "retainer", label: "Retainer" },
-            ] as const).map((opt) => (
-              <button
-                key={opt.value}
-                type="button"
-                onClick={() => updateMacro("offer_type", opt.value)}
-                className={`px-3 py-1 text-sm rounded-md transition-colors ${
-                  macro.offer_type === opt.value
-                    ? "bg-[#1A463C] text-white font-medium"
-                    : "text-[#71717a] hover:text-[#1a1a1a]"
-                }`}
-              >
-                {opt.label}
-              </button>
-            ))}
-          </div>
-        </div>
-
         <div className="flex items-center gap-3">
           <span className="text-xs text-[#71717a] w-24 shrink-0">Tipo</span>
           <OptionMultiSelect