fix(tariffs): include DB-only visible tariffs missing from ezy API

Dyvolis tariffs (ezy_id 2001/2002) exist in DB but ezy returns only
the "Online" 3xxx-series tariffs from its activity endpoint. The merge
loop silently dropped anything not in the ezy response, leaving the
DyvoLis ticket section empty.

Now after building the ezy-merged list, DB-visible tariffs absent from
ezy are appended so every visible tariff shows up regardless of which
ezy activity it belongs to.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/api/tickets/tariffs/route.ts

@@ -18,6 +18,8 @@ export async function GET(): Promise<NextResponse> {
       overrideAccess: true,
     })
 
+    const ezyIdSet = new Set(ezyTariffs.map((t) => t.id))
+
     const merged = ezyTariffs
       .map((t) => {
         const dbRecord = dbTariffs.find((d) => d.ezy_id === t.id)
@@ -34,9 +36,24 @@ export async function GET(): Promise<NextResponse> {
         }
       })
       .filter(<T>(v: T | null): v is T => v !== null)
-      .sort((a, b) => a.sort - b.sort)
 
-    return NextResponse.json({ tariffs: merged })
+    // Include visible DB tariffs not present in ezy (e.g. dyvolis uses a separate ezy activity)
+    const dbOnly = dbTariffs
+      .filter((d) => d.ezy_id != null && !ezyIdSet.has(d.ezy_id as number))
+      .map((d) => ({
+        id: d.ezy_id as number,
+        name: (d.display_name ?? d.last_synced_name) as string,
+        price: (d.last_synced_price ?? 0) as number,
+        categoryTag: d.category_tag as string | null,
+        description: d.description ?? null,
+        image: d.image ?? null,
+        icon: d.icon ?? null,
+        sort: (d.sort ?? 0) as number,
+      }))
+
+    const all = [...merged, ...dbOnly].sort((a, b) => a.sort - b.sort)
+
+    return NextResponse.json({ tariffs: all })
   } catch (err) {
     logger.error({ err }, 'Failed to get tariffs from ezy — trying DB fallback')