chore: upgrade Prisma 7, LangChain 1.x, Tailwind 4.2, Vue 3.5.29 and other deps

- Prisma 6 → 7: new prisma-client generator, prisma.config.ts, PrismaPg adapter, updated all imports
- LangChain 0.x → 1.x: @langchain/core, langgraph, openai
- Tailwind 4.1 → 4.2.1, daisyUI 5.5.19, Vue 3.5.29, ai 6.0.99, zod 4.3.6
- Fix MessageDirection bug in crm-updates.ts (OUTBOUND → OUT)
- Add server/generated to .gitignore

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

frontend/prisma/schema.prisma

@@ -1,10 +1,10 @@
 generator client {
-  provider = "prisma-client-js"
+  provider = "prisma-client"
+  output   = "../server/generated/prisma"
 }
 
 datasource db {
   provider = "postgresql"
-  url      = env("DATABASE_URL")
 }
 
 enum TeamRole {