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/client/OffersSection.tsx

@@ -1,6 +1,8 @@
 interface ActiveOffer {
   id: string;
-  public_name: string;       // micro offer public name only (security: see T-05-10)
+  public_name: string;       // micro offer public name (tier label) — NOT shown to client (T-05-10)
+  offer_name: string;        // macro public_name — shown as heading
+  offer_type: string;        // una_tantum | retainer
   cumulative_price: string;  // sum of service prices
   accepted_total: string | null;
 }
@@ -16,7 +18,8 @@ export function OffersSection({ offers }: OffersSectionProps) {
     <div className="space-y-3">
       {offers.map((offer) => (
         <div key={offer.id} className="bg-white rounded-lg border border-[#e5e5e5] p-4">
-          <p className="text-sm font-semibold text-[#1a1a1a]">{offer.public_name}</p>
+          {/* Show macro public_name as heading — never tier letter, never internal_name */}
+          <p className="text-sm font-semibold text-[#1a1a1a]">{offer.offer_name}</p>
           <div className="mt-2 space-y-1">
             <div className="flex items-center justify-between">
               <span className="text-xs text-[#71717a]">Valore incluso</span>