⚡ Bolt: Optimize bundle size by removing static icon imports

[sshahriazz]

💡 What: Replaced static imports of large Iconify JSON datasets with dynamic loading using @iconify/react.
🎯 Why: The static imports included thousands of unused icons in the client bundle, causing significant bloat.
📊 Impact: Expected to reduce the client bundle size by several megabytes (depending on how many sets were fully imported).
🔬 Measurement: Verified that icons still render using a Playwright script. Confirmed that all IconifyIcon usages in client/src use the required prefix:name format, making the removed fuzzy search logic unnecessary. Addressed reviewer concern about Google icon regression by verifying SocialAuth uses Image component (unrelated to this change).

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PR created automatically by Jules for task 16031859380534923330 started by @sshahriazz

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