Add configurable home background image with blur and dim controls#29

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Copilot wants to merge 11 commits into

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copilot/add-background-blur-feature

Commits on Dec 29, 2025

Initial plan
Copilot
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feat: add configurable home background blur

Copilot
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Sunwuyuan
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refine background settings validation and safety

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harden background url handling

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improve background url sanitization

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harden css escaping for background

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tighten background url validation

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restrict background protocols and document scaling

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Sunwuyuan
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Add configurable home background image with blur and dim controls

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Sunwuyuan
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chore: add browser globals for eslint

Copilot
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Sunwuyuan
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chore: inline eslint globals

Copilot
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Sunwuyuan
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