0.2.27-0.2.32: LP portal polish, brand palette, default investor logins

Cumulative checkpoint since 0.2.26:
- 0.2.27/28: entity valuation-history table; investor gain/loss = NAV +
  distributions vs paid-in
- 0.2.29: Reset Fund Partners (endpoint, Partners-tab button, CLI, action)
- 0.2.30: "Current Capital Balance" label, %-only gain/loss
- 0.2.31: Management Entities rename, Carry Vehicle type, chart
  distributions-line gate
- 0.2.32: LP-facing polish pass
  * Ten31 brand palette from the logo (navy/mint); orange retired
  * portfolio summary card across funds; gain labeled "net of paid-in"
  * whole-dollar headline figures; "History · N quarters" toggle
  * documents grouped by year with a "New" badge (users.docs_seen_at)
  * eNAV-created members start on default password with login enabled;
    enable-investor-logins CLI + StartOS action for existing accounts
  * password minimum raised to 8 chars; login help line (Portal@ten31.xyz)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/pages/EntityDocuments.tsx

@@ -61,7 +61,7 @@ export default function EntityDocuments() {
                 </td>
                 <td className="px-4 py-2 text-gray-500">{formatDate(d.created_at)}</td>
                 <td className="px-4 py-2 text-right whitespace-nowrap">
-                  <a href={api.downloadUrl(d.id)} className="text-orange-600 hover:text-orange-700 mr-3">
+                  <a href={api.downloadUrl(d.id)} className="text-accent-600 hover:text-accent-700 mr-3">
                     Download
                   </a>
                   <button