BE-051: todo view — WORK-005 freshness greyscale on ticket rows

Now: OPEN

Input

Context

Ordered by gritzko 2026-07-19: the todo board (BE-038 view, be/views/todo/todo.js) should fade its rows by age exactly like the work view does since WORK-005 (e4614c19). The formula is TAKEN FROM THE CODE, views/work/work.js:400-412 fadeHex(ts):

days = floor((ronToMs(be.now) - ronToMs(ts)) / 24h); perceptual ramp lvl = days<=0 ? 0 : min(days+1, 8) (day 1 jumps to #222, #000/#111 indistinguishable); channel = lvl*0x11 → fresh #000000 .. week+ #888888.
Delivery: a row-leading bare #rrggbb O token (pager-only, btns guard work.js:419); view/bro.js paintWhyRow tints the row's default cells; the plain path stays chrome-free.

Goals

Todo rows fade on the same greyscale ramp: a ticket page's freshness ts drives fadeHex, freshest tickets black, week+ old at #888.

Freshness source for a page: the ticket file's mtime (io.stat) — the board already stats pages in pageFile.
Same delivery: leading #rrggbb O token per row in the pager, plain output untouched.

Constraints

Reuse, don't duplicate: lift fadeHex into a shared helper (view/bro.js or shared/render) and point BOTH views at it — no second copy of the ramp.
be.now is the time truth (never read-back), ronToMs conversions as in work.js.
No pager changes: paintWhyRow already applies the token.

WIP

Design decisions

TODOs

extract fadeHex to the shared seam; work view keeps behavior (view test stays green)
red: todo view golden pins a fresh row #000000 and an aged row's grade
feed page mtime → fadeHex O token on todo rows, pager-only; green + pty look