[M5-S6] Pocket computer map screen #69

User story

As a player, I want the pocket computer to show where I've been, so that I can find my way back in the maze.

Acceptance criteria

• Green-on-black CRT map; rooms fill in as visited; no minimap
• Opens with the menu key once you have the item

Design and references

02 – Items and progression. Cut 6th if late (keep the item and the Dexter scene).

Dependencies

Suggested owner: Alexander (pipeline, art, scenes, deploy).

Verification

Open it in each chunk; visited rooms are right.