Show selected grid cell on the map and polish map UI.

[aivanchenk]

Summary

• Draw the snapped 0.05° cell as a filled polygon with dashed guide lines to the viewport edges
• Fly to the selected cell on click (min zoom 9)
• Map readout: 2-column grid, kicker inline with title, selection divider
• Nav and control panel share elevated surface tokens; lighter shadows in light mode
• Theme-aware selection colors; brand mark via accent mask
• OpenFreeMap basemaps; brighten place labels on dark map

Review plan

• Click a pixel in light and dark mode, see cell box, guides, and readout update
• History slider still loads the time series
• Nav and control panel readable on the map background

[gemini-code-assist]

Code Review

This pull request transitions the map base styles to OpenFreeMap, introduces custom dark map style patching to improve label legibility, adds animated view state transitions when focusing on selected grid cells, and refactors the brand mark to use CSS masks. Feedback focuses on improving the robustness of the dark map style loading and fallback mechanism: specifically, allowing the darkMapStyle state to accept a string fallback URL, handling fetch failures by setting the fallback URL and clearing the cached promise to allow retries, and avoiding redundant label brightening loops when the style is already pre-patched.

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[github-actions]

🚀 Vercel preview deployed

Preview URL: https://earth-prints-gldsj4rau-anastasiia-s-projects10.vercel.app

[lazarusA]

Looks good. And we should keep the pixel selected, however in #25 I meant to write that we should also show all the pixels that were cached, the 40x40 box maybe in a different shadow color (orange? yellow-ish, grey?, is open ). Sorry, I din't write that there, but it should be easy to add now.

Edit: The 40x40 numbers should eventually be retrieved from the array properties, not hard-coded.

[lazarusA]

After looking at the performance and how smooth the clicking is I think we don't need to draw the corresponding chunk size grid fetched. So, we can leave that for later, and a different issue should be opened, plus, it should be optional, namely, the user should be able to show/hide the extent.