Do NOT rebuild it: web/ is a working Vite + React terminal with panes for position, oracle, keeper, backing, governance, redemption and work, and all of that stays. Build output goes to dist/, which is what is served. Two changes: it gains a light theme, and it gains charts, because at the moment every pane is a block of figures and nothing shows the protocol's shape.

NO BACKEND, NO INDEXER, NO SUBGRAPH. Every figure comes from a contract read or from logs read in the browser. Where a historical log range is needed, chunk it and fall back to the Sepolia Blockscout API (https://eth-sepolia.blockscout.com/api/v2/...); a public RPC silently returns an EMPTY ARRAY for ranges it declines rather than erroring, so an empty log result must render as "could not read" and NEVER as "no positions". That distinction matters: a keeper who sees an empty loan book sits still while a position rots.

ONE: TWO THEMES.

Light is the treasury-paper palette and these seven hexes exactly, with no new hue: ivory #F7F5EF, surface #FFFDF8, ink #16202E, slate #5A6472, hairline #D8D3C7, engraved green #2F5D50, oxblood #8C2F2F. Dark is what the site already has — keep its tokens (--bg #111, --surface #161616, --text #eee, --muted #a8a8a8, --rule #3a3a3a, --raised #202020) and tighten them to the same structure the light theme uses.

Default to the operating system via prefers-color-scheme, with an explicit toggle whose choice persists. Set theme-color per theme rather than the hardcoded #111111 it has now. EVERY colour must resolve from a token defined in BOTH themes and never a literal: a colour defined in only one theme is how a page ends up rendering one theme's text on the other theme's background, and it is the usual way this change breaks.

TWO: THE LOAN BOOK, as a collateral-ratio strip. This is the headline.

A horizontal axis of collateral ratio with three zones drawn as bands: liquidatable below minCR(), redeemable between minCR() and redemptionCeilingCR(), safe above. Every open position is a mark on that axis whose AREA is proportional to its debt. Read the live minCR() and redemptionCeilingCR(), never constants — minCR rises as the health index falls, so the bands MOVE, and watching a position cross into the redeemable band as NHI drops is the single most informative thing this interface can show.

Discover positions from the vault's own CollateralDeposited logs since its deployment block, collect the distinct owners, then read positions(owner) for each. Drop any whose debt is zero.

Colour carries meaning only: oxblood for a position inside minCR, engraved green outside it. No third hue, no gradient, no glow.

Label each position with a deterministic two-word name derived from its address — a fixed curated word list in the engraving and currency vocabulary the design already speaks, so the same address always reads the same way. This is a READABILITY device and must never be described as privacy: the addresses are public and this mapping is deterministic. The full address must stay visible on hover, and the keeper pane must keep showing real addresses next to anything that acts on them.

THREE: FOUR SMALLER CHARTS.

Oracle update cadence: a sparkline of accepted values from each feed's AttestationAccepted logs, with every update drawn as a visible point. The IRREGULAR SPACING is the story — this protocol buys its price on demand rather than receiving it on a clock — so do not smooth the gaps away, and mark the staleness limit.

Supply composition: one stacked bar splitting supply into collateral-backed and work-minted, with the backing ratio drawn across it and par marked.

Price against the divergence band: the primary feed and spot as two marks inside a band derived from maxDivergenceBps(), so how close the protocol sits to halting is visible.

Work ceiling headroom: one bar of totalWorkMinted against the live workCeiling().

FOUR: MOTION, and only where it carries information. The bands slide when minCR changes. Marks ease to their new ratio when a price lands rather than jumping. The sparkline draws in on load and appends a point when a new attestation arrives. Figures tick to new values instead of snapping. Keep the durations and easing the site already uses, and keep honouring prefers-reduced-motion.

The interface must still fit one viewport with no page scroll at 1280x800 and 1440x900, with only panes scrolling on their own overflow, and must still work at phone width.