Phase 5 of turning the game into the company landing page.
- Replace purchase-only missions with a data-driven list of short step
chains (goto, locate on map, inspect, order, buy, buy at N places)
in src/game/missions, with pure progress logic on the game state.
- Six missions, most about machines installed in Park Mellat; add two
sites there (lake and sports fields) and record the product model
installed at every site.
- Inspecting a machine opens a machine card with the installed model,
specs, price, an order request and sales contact.
- The objective chip shows the current step; the missions sheet lists
missions with the current one's steps ticked; a brand-coloured arrow
hovers over the target machine.
- Rewards and banners per finished mission, the next step is spoken.
- Tests for mission data, step logic, text and the machine card.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>