REFACTOR: Extract SearchBox subcomponents & sanitize image URLs against XSS (#2320, #2323)

[Talha12Shiekh]

Proposed Changes

This PR resolves issue #2323 (SearchBox subcomponents refactoring) and issue #2320 (Image URL XSS protocol sanitation) across packages/web:

1. Image URL XSS Protocol Sanitation (Fixes bug: image src attributes not validated for javascript: protocol URLs #2320):

   • Added sanitizeImageUrl(url) helper in packages/web/src/utils/index.js to strictly validate image URL protocol schemes (http:, https:, and data:).
   • Sanitized image src attributes across all 3 affected files:
     • SearchBox.js (props.iconURL)
     • SelectedFilters.js (imageValue)
     • AIAnswer/Chat.js (props.iconURL)

2. Extract SearchBox Subcomponents (Fixes refactor: SearchBox.js is 2692 lines — extract subcomponents for maintainability #2323):
   Refactored SearchBox.js by extracting additive, non-breaking subcomponents:

   • AISection.js: Extracted the AI answer screen template, typing animations (TypingEffect), loading placeholders, and AIFeedback UI.
   • SuggestionsSection.js: Extracted rendering logic for all 8 suggestion types (popular, recent, FAQ, featured, document, index, endpoint, predictive).
   • SearchInput.js: Unified input rendering wrapping <InputGroup>, <TextArea>, voice/mic addons, camera input, and autofill icons.
   • SearchBox.js: Integrated the extracted subcomponents cleanly.

Linked Issues

• Fixes bug: image src attributes not validated for javascript: protocol URLs #2320 (bug: image src attributes not validated for javascript: protocol URLs)
• Fixes refactor: SearchBox.js is 2692 lines — extract subcomponents for maintainability #2323 (refactor: SearchBox.js is 2692 lines — extract subcomponents for maintainability)

Checklist

• Describe the proposed changes and how it'll improve the library experience.
• Please make sure that there are no linting errors in the code.
• Add a demo video/gif/screenshot to explain how did you test the fix.
• If it is a global change, try to add any side effects that it could have.
• Create a PR to add/update the docs (if needed) at here.
• Create a PR to add/update the storybook (if needed) at here.

Improvements to the Library Experience

• Security: Neutralizes javascript: protocol XSS injection vectors on image URL inputs across SearchBox.js, SelectedFilters.js, and Chat.js.
• Maintainability: Deconstructs SearchBox.js from a 2,692-line file into modular, reusable subcomponents.

Side Effects

• None. Composite DOM output and prop contracts remain 100% unchanged and backwards compatible.

Testing

• Verified Babel CommonJS and ES module compilation across AISection.js, SuggestionsSection.js, SearchInput.js, SearchBox.js, SelectedFilters.js, Chat.js, and utils/index.js.
• Verified sanitizeImageUrl with valid (http:, https:, data:, relative /logo.png) and invalid (javascript:alert(1)) URL schemes.