Rewrite the Data page shell into a settings-style two-pane layout (sticky goal
-nav on desktop, segmented on mobile) with:
- ConnectionHero — 5 states so a network blip is never mistaken for "not
connected" and a server without SimpleFIN never shows a dead Connect button
(loading / disabled / error+retry / not-connected / connected±needs-attention);
Sync-now handles partial errors, 429, and failure with toasts.
- DataNav — <nav> landmark, aria-current, keyboard, responsive.
- ?section= deep-linking via useSearchParams (URL source of truth → localStorage
→ default; migrates the old 3-tab key), so refresh/back-button work.
- Goal-based regroup into 4 panes with plain-language titles/subtitles/icons
passed via cardProps (every section component reused unchanged).
- Lazy panes: ImportSpreadsheet/ImportMyData code-split (own chunks) + only the
active pane mounts; framer-motion cross-fade (reduced-motion aware);
focus-to-heading on switch.
- Repoint BankTransactions "Open Data" → ?section=bank-sync; add /data to the
authed axe sweep.
Build clean (heavy panes split into their own chunks); client suite 46 pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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