Malte Langkabel dc58f6ea32 make HeaderBar read block stock and expansion cost from the simulation
HeaderBar was the only panel caching event payloads as truth. It now holds
a const Simulation* and re-reads getBuildingBlocksStock() /
getCurrentExpansionCost() in the handlers, per the "events are refresh
signals" rule.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GH8ZMRY3vhxxXcaUxBqxkk
2026-08-02 20:49:38 +02:00
2026-07-12 09:16:49 +02:00
2026-07-22 21:44:20 +02:00
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