feat: dochazka Excel export + auto-reload + 162 filter

- Add dochazka Excel export using direct ZIP/XML manipulation of template
  (preserves styles.xml byte-for-byte to avoid Excel "repaired styles" warning)
- Calculate per-person stravné doplatek, transport (AUV), and indiv1
  (closure count + Janouš internet) per sichtovnice.py logic
- Filter exported people to TEMPLATE_NAMES (12 fixed template rows)
- Add server version polling + auto-reload on deploy
- Add FPD check modal for monthly hour validation
- Add "162" filter button to hide first 5 TKB people from view

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/src/ProposalModal.tsx

@@ -59,7 +59,7 @@ export function ProposalModal({ onClose }: ProposalModalProps) {
     >
       <div className="bg-slate-800 border border-slate-600 rounded-xl shadow-2xl w-full max-w-xl max-h-[80vh] flex flex-col">
         <div className="flex items-center justify-between px-5 py-3 border-b border-slate-700">
-          <h2 className="text-sm font-semibold text-slate-200">Navrhy na vylepseni</h2>
+          <h2 className="text-sm font-semibold text-slate-200">Návrhy na vylepšení</h2>
           <button
             onClick={onClose}
             className="text-slate-500 hover:text-slate-300 cursor-pointer text-lg leading-none"