docs(jobs): the phone's band, and why it is in flow

CLAUDE.md's jobs section said the header indicator is "the one view of
everything at once, from every page"; that is now true on a desktop
only, and the band is the phone's half.

NOTES.md takes the measurement that decided the shape -- an overlay
band at 424x439 is a lid, not a notification -- and the corollary about
which tier can see it: ui-test, tsc, lint and the Go suite all passed
on the broken version, and what failed was three e2e specs that have
nothing to do with jobs. Run the suite, not the spec you wrote.

CLAUDE.md

@@ -593,11 +593,38 @@ rather than renaming them.
   `ClearFinishedJobs` is global — a Clear under Libraries would discard
   the index build's history too; a finished row dismisses itself.
 
-  The header `job-indicator` is untouched and is still the one view of
-  everything at once, from every page. One consequence worth knowing
-  before writing a spec: a section holding a `job-panel` also holds a
-  `job-details-drawer`, whose own header carries `.header` — so
+  The header `job-indicator` is still the one view of everything at
+  once, from every page — **on a desktop.** One consequence worth
+  knowing before writing a spec: a section holding a `job-panel` also
+  holds a `job-details-drawer`, whose own header carries `.header` — so
   `config-section .header` is ambiguous the moment a job exists.
+
+  **Below 600px that indicator stands down and `<job-band>` takes
+  over** (#62), because a popover is a *disclosure* and background work
+  is the one thing a phone should not make you open something to see —
+  and because #57 deletes the bar it is anchored to and is blocked on
+  it having somewhere else to live. The band is the same `job-panel`,
+  so `applyJobControl` and its index-build confirmation come along
+  rather than being reimplemented; `kinds="*"` is how it says "every
+  kind", which is what the indicator was for.
+
+  Three things about it are load-bearing. **It is in the layout, not
+  over it**, as its own grid row above the main panel: the first
+  version put it in `notification-host`'s fixed band, which reads fine
+  in a screenshot and is unusable — at 424×439 a compact panel is
+  ~200px of a 439px screen and it *covers* what is under it, which four
+  e2e specs caught by failing on taps it was intercepting. **It shows
+  active work only** (`active-only`), because in flow a finished row is
+  furniture that keeps the content pushed down after the work is done;
+  finished rows stay where the work was started, which is #27's rule.
+  And **it renders nothing above 600px**, from `matchMedia` rather than
+  a media query, because that decides whether the element *exists* —
+  Settings already holds four `job-panel`s and a fifth answering for
+  every kind is `bottom-nav`'s "resolved to 2 elements" trap again.
+  `index.css` keeps it `display: none` outside the phone for a second
+  reason: an in-flow grid child with no named area is auto-placed into
+  one of the shell's rows, which is what the skip link is absolutely
+  positioned to avoid.
 - `config` — TOML-based settings. Settings page uses HTMX + templ for server-rendered HTML fragments.
 - `playlist` / `smartplaylist` — Playlist CRUD and rule-based smart playlists.
 - `mediacontrols` — OS media controls behind one `Handler`: MPRIS over