Added

• Research tree in the stars: the research panel is now a full-screen, pannable tech tree floating over the starfield, with glass tech cards, glowing circuit traces between them, and a little celebration when something unlocks.
• Research queue: click any tech and its whole prerequisite path queues up, purchasing itself automatically as research points come in. The queue survives saving and loading.
• Shareable world seeds: every new game gets a world seed code you can reroll, paste, or share, and the pause menu shows your current world's code with a Copy button. The same code recreates the same worlds.

Changed

• Research categories now match the build tray, so the tree and the tray teach one shared map of technology, and the techs were reorganised to fit.
• Returning to the Main Menu or quitting from the pause menu now asks for confirmation first.
• Mysterious late-game buildings no longer show up in the build tray before they're discovered.
• The tutorial now teaches researching in two clear steps: pick a tech, then confirm it in its inspector.

Fixed

• The asteroid highlight no longer draws over the top bar, and clicking empty space deselects an inspected asteroid.
• The empire's "Economy over time" chart no longer spills out of its card when your balance dips into debt.
• The Help panel's tutorial tip no longer hides behind the very panel it describes.
• A batch of backlog bugs fixed.

Balance

• Station core oxygen production rebalanced, with each core type now supplying its own amount.