fix(pitch-deck): exclude mcp-server from Next.js tsconfig + resolve FinanzplanSlide conflict

- tsconfig.json: add mcp-server to exclude list so the standalone MCP
  package's imports don't break the Next.js type-check build
- FinanzplanSlide.tsx: resolve merge conflict, keep MonthlyGrid refactor
  from upstream (discards superseded inline table from stash)

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

pitch-deck/tsconfig.json

@@ -17,5 +17,5 @@
     "target": "ES2018"
   },
   "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
-  "exclude": ["node_modules"]
+  "exclude": ["node_modules", "mcp-server"]
 }