Fix TypeScript type-safety debt (576 -> 2 errors, #11)

[azlaan428]

• Add next-auth type augmentation for custom session fields
• Type untyped useState/params across 89 files
• Move authOptions to shared typed module
• Fix incidental bugs: missing useEffect imports, typo, broken import path, lucide-react Icon rename
• Leave 2 pre-existing logic bugs untouched (datatable.tsx, Header.tsx) pending team decision"

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Project	Deployment	Actions	Updated (UTC)
salesfam	Error		Aug 7, 2026 2:25pm