The board approval percentage calculation had fragile fallbacks that could
miss the pricing_configs data and fall back to the old membership_value.
Added cascading fallbacks: PricingEngine → branch+qual → branch-only →
any active pricing → membership_value (last resort).

Also fixed the JS preview in show.php which was using the stored
membership_value (114,000) instead of the current plan price (150,000)
for the real-time calculation hint.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>