add zeit todo

TODO.md

@@ -522,8 +522,38 @@ Implementation notes:
   (`RateLimiter.perHour`, wired into the provider). A batched quote
   call is 1 request, but heavy `r` use plus candle refreshes draw from
   the same hourly budget, so watch for contention.
-- Tiingo websocket streaming would be the natural follow-on for true
+ - Tiingo websocket streaming would be the natural follow-on for true
-  push-based real-time, replacing poll-on-`r` entirely.
+   push-based real-time, replacing poll-on-`r` entirely.
+
+## Precise "as of <clock time>" via a datetime/timezone lib (zeit) - priority LOW
+
+The portfolio tab's live-price footer is deliberately vague static
+text: "(as of intraday quote today)" after a live refresh, falling
+back to "(as of close on YYYY-MM-DD)" otherwise. We can't do better
+today because the codebase has no wall-clock-to-local-time machinery -
+`Date` is days-only, and every time display is either a date or a
+relative "X ago" (`fmt.fmtTimeAgo`). There's no way to render an
+absolute local clock time like "2:34 PM ET".
+
+Pulling in a datetime/timezone library (e.g. [zeit](https://github.com/rockorager/zeit),
+already by the libvaxis author) would let us:
+
+- Show a precise, honest stamp: "(as of 2:34 PM ET)" / "refreshed
+  2:34 PM" instead of "today" / "Xs ago".
+- Fix the current label's weekend/after-hours imprecision. Right now a
+  refresh when the market is closed flips the footer to "intraday quote
+  today" even though Yahoo returned the last close (which on a Saturday
+  is Friday's). With real clock + market-calendar awareness, the label
+  could say "as of Fri close" or "(market closed, last quote Fri 4:00
+  PM ET)" instead of implying live intraday data.
+- Replace `last_refresh_s` "refreshed Xs ago" in the TUI status bar
+  (and the quote/earnings/options "data Xs ago" readouts) with absolute
+  times where that reads better.
+
+Scope is a judgment call: a new dependency for what's currently a
+cosmetic label. Worth it once we want trustworthy timestamps (e.g. for
+screenshots, or to stop conflating "live" with "last close"); not
+before.
 
 ## Audit: em-dash sentinel usage across all tables — priority LOW