feat(09-02): implement admin quote builder UI with server actions

- src/lib/quote-actions.ts: createQuote server action with nanoid tokens and atomic DB transaction
- src/components/admin/quotes/QuoteBuilderForm.tsx: Two-column form (left: client/offer/price inputs, right: live preview)
- src/components/admin/quotes/OfferSelector.tsx: Grouped dropdown for macro/micro offer selection
- src/components/admin/quotes/PriceOverrideInput.tsx: Price input with server validation feedback
- src/components/admin/quotes/QuotePreview.tsx: Live preview card showing offer details and calculated total
- src/app/admin/quotes/new/page.tsx: Quote builder page rendering form with data from DB
- src/app/admin/quotes/new/actions.ts: Re-export of createQuote for page-level action imports
- src/lib/admin-queries.ts: Added getAllOfferMacrosWithMicros() query for form population

Features:
- Admin selects client and offer (required fields)
- Form validates on blur and displays success/error states
- Server action validates data and rejects if total mismatch
- On success, displays public /quote/[token] link with copy button
- Quote saved as draft state with immutable accepted_total

Completes Phase 9 Plan 2 Wave 1: Admin UI Layer

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/lib/admin-queries.ts

@@ -15,6 +15,7 @@ import {
   services,
   settings,
   offer_micros,
+  offer_macros,
   project_offers,
   offer_phases,
   offer_phase_services,
@@ -35,6 +36,7 @@ import type {
   ServiceCatalog,
   Service,
   OfferMicro,
+  OfferMacro,
   ProjectOffer,
   OfferPhase,
   OfferPhaseService,
@@ -768,4 +770,28 @@ export async function getQuotesByClient(clientId: string): Promise<Quote[]> {
     .from(quotes)
     .where(eq(quotes.client_id, clientId))
     .orderBy(sql`${quotes.created_at} DESC`);
+}
+
+/**
+ * Get all offer macros with their micros (ordered by sort_order)
+ * Used by: /admin/quotes/new form (OfferSelector dropdown)
+ */
+export async function getAllOfferMacrosWithMicros(): Promise<
+  (OfferMacro & { micros: OfferMicro[] })[]
+> {
+  const macros = await db
+    .select()
+    .from(offer_macros)
+    .orderBy(asc(offer_macros.sort_order));
+
+  if (macros.length === 0) return [];
+
+  const allMicros = await db.select().from(offer_micros);
+
+  return macros.map((macro) => ({
+    ...macro,
+    micros: allMicros
+      .filter((micro) => micro.macro_id === macro.id)
+      .sort((a, b) => a.sort_order - b.sort_order),
+  }));
 }