* CommandPalette: Rewrite with modular API and Raycast-style UI
Replace the monolithic palette with a command/page registry, capture-phase keyboard routing, fuzzy search with pins and aliases, form pages including Send DM with markdown preview, and a top-anchored shell layout.
* CommandPalette: Fix stylelint errors in palette CSS
Reorder selectors for no-descending-specificity, replace deprecated word-break, and use overflow shorthand on picker list.
* [autofix.ci] apply automated fixes
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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
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