fix: reduce result animation delay

[uuzzrm]

Description Closes #2185. Search and image results no longer make later items wait behind a long staggered fade-in. The transition now caps the stagger at five 40 ms steps and uses a 250 ms fade, so the result list finishes entering within roughly 450 ms instead of several seconds. Both result lists also respect prefers-reduced-motion by disabling the transition delay and duration. ## How to test - node node_modules/vitest/vitest.mjs run — 40 files, 357 tests passed. - node node_modules/@biomejs/biome/bin/biome check client/components/Search/Results/Graphical/ImageResultsList.tsx client/components/Search/Results/Graphical/ImageResultsList.test.tsx client/components/Search/Results/Textual/SearchResultsList.tsx client/components/Search/Results/Textual/SearchResultsList.test.tsx client/components/Search/Results/testUtils.ts — passed. - node node_modules/typescript/bin/tsc --noEmit — passed. - node node_modules/vite/bin/vite.js build — passed. The repository's npm-based pre-commit and lint scripts could not run locally because npm is not available in the shell. The direct checks above were run with the bundled Node runtime. The full repository TypeScript check still reports existing debug declaration errors in three server files, and the architectural linter still reports existing server-side external API findings; neither is in the changed files. ## Screenshots Not applicable; this change affects transition timing and reduced-motion behavior.

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[felladrin]

Hi, @uuzzrm! Thanks for the fix, and congrats on your first contribution to this project!