feat: improve pdf:text-layer extractor robustness and install wizard responsiveness

[pingSubhajit]

Summary

This PR enhances the pdf:text-layer extractor with improved PDF.js configuration and reduces warning noise, while also making the install wizard fully responsive for mobile and tablet devices.

Changes

PDF Text Layer Extractor Improvements

• Proper PDF.js asset configuration: Dynamically resolves and configures standardFontDataUrl and cMapUrl paths to prevent "standardFontDataUrl" warnings during extraction
• Reduced console noise: Sets PDF.js verbosity level to ERRORS only, eliminating non-critical warnings in CLI output
• Page-level concurrency: Extracts text from multiple pages in parallel (respects assetProcessing.concurrency setting, capped at 8)
• Memory management: Properly calls doc.destroy() after extraction to free resources
• Early termination: Stops parsing additional pages once maxOutputChars is reached
• Improved error handling: Gracefully handles per-page extraction failures without aborting the entire document
• Added TypeScript declarations: New pdfjs-dist-legacy.d.ts for the legacy PDF.js module exports

Install Wizard Responsive Design

• Mobile-friendly header with adjusted padding and gap spacing
• Mobile Reset button in header (visible on smaller screens)
• Collapsible step navigation sidebar on mobile with horizontal scrollable step buttons
• Live preview panel displayed inline on mobile/tablet (below xl breakpoint)
• Responsive grid layouts for chunk settings (1/2/3 columns based on breakpoint)
• Responsive review summary grid and action buttons
• Full-width navigation buttons on mobile with proper visibility handling

Cleanup

• Removed deep-merge.ts from registry file copy list (no longer needed as separate file)
• Updated init test to reflect the removal

Testing

• Verified PDF extraction produces cleaner console output
• Confirmed install wizard displays correctly across mobile, tablet, and desktop viewports

[vercel]

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Project	Deployment	Review	Updated (UTC)
unrag-web	Ready	Preview, Comment	Jan 8, 2026 6:47pm