Tweak energy map descriptions.

[matkoniecz]

No description provided.

[Copilot]

Pull Request Overview

This PR tweaks the energy map descriptions to improve clarity and consistency in the user interface. The changes update terminology to better distinguish between residential and non-residential energy ratings.

• Updated map titles to use "residential" and "non-residential" terminology
• Modified legend text to clarify coverage for buildings without EPC data
• Changed the color for "No EPC identified" areas from light gray to darker gray

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
app/src/frontend/config/category-maps-config.ts	Updated energy rating map titles and legend descriptions for better clarity
app/map_styles/polygon.xml	Updated polygon color to match the legend color change

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