v0.7.9.7 — a device that said it was available all day after it was gone

The last item off 0.7.9.6's sweep, parked there as the one genuine maybe.
It had a second half worth more than the first.

#101 — Telegraph (+4), Telephone (+8) and Radio (+12) are "once a day,
when dispatching facing trains, add +N to the other train's number".
`enhancementText(key)` takes only the KEY, so the tooltip could not vary
with anything: a spent Radio read "Once a day, add +12..." for the rest
of the Day, advertising a bonus that was not there. That is `trainRules`
before #100, in another corner of the same view.

THE HALF THAT ACTUALLY SURPRISES. `spendDispatchBonus` reads
`areaOf(s, s.clock.superintendent)` — the SUPERINTENDENT's own devices,
not the train owner's — and the Fedora moves every STAGES_PER_SHIFT (3)
Stages, four times a Day. So a player's Radio does nothing at all for
three-quarters of the Day, and is spent automatically, without its owner
being asked, during the quarter it is theirs. Neither half was anywhere
on the board.

The card now reads as one of three states — available and dispatching,
unspent but idle while somebody else holds the Fedora, or spent until the
next Day — and names the shift length, because "not now" without "for how
long" is half an answer. A spent device is struck through on the board.
Shown on EVERY district, not only the viewer's (Jesse's call): it is
public, and a rival's spent Radio is what you want to know before forcing
a meet.

What counts as a device is `enhancementRule(key)?.dispatchBonus` rather
than three keys written out in the view — the ladder lives in
ENHANCEMENT_RULES and a fourth rung would otherwise be silently exempt.

A STALE COMMENT CORRECTED, AND PINNED. `advance.ts` warned that indexing
a SEAT-keyed area with the PLAYER holding the Fedora "is right only while
seating is the identity map". It read as a live Employee Rotation bug and
was not one: `areaOf(s, p)` IS `areaAtSeat(s, seatOf(s, p))`. A comment
that sends the next reader chasing a bug that does not exist costs about
what the bug would. Rewritten, and the claim is now a test — seating set
to a real permutation, and the Superintendent's own district rather than
the seat with the same index is the one that reads as dispatching.

TWO THINGS MUTATION CAUGHT THAT PASSING DID NOT. A test asserted the
ABSENCE of /spent|Fedora/ with the Fedora held, and a mutant with the
`dispatchBonus` guard deleted PASSED it — the leaked text in that case
says "Available today, and this district is dispatching", which contains
neither word. A test that something was left alone has to compare it
against what it should be, so it asserts equality with `enhancementText`
now, in both Fedora states. And the replay wire format needed the field:
cells pack positionally, so the flag is index 9 and reads `?? []`, the
same tolerance `standingWest` uses — older recordings report no device
spent, which is what they drew at the time, so every published replay is
unchanged.

943 tests pass, up from 934.

NOT VERIFIED AT A TABLE, like 0.7.9.6. #39 and #35 still stand.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y5boPxP6JHRYMm8adXaF5R

src/sim/board-svg.ts

@@ -1098,9 +1098,18 @@ export function officeSvg(
       // card, the old y = H-46 baseline printed the label straight along the rail itself.
       // Hover text per enhancement, from the card catalogue — an Interlocking used to be a bare word
       // on the card with nothing to say what it did, or that it does not do it yet.
+      // A SPENT dispatch device is struck through (#101). Telegraph/Telephone/Radio are "once a
+      // day", and the label said the same thing before and after the Superintendent spent one — so
+      // the card advertised a +12 that was not there. Per-`tspan` rather than per-`text` so the
+      // names still read as one row, and `?? []` because `piecePreview` builds a cell literal by
+      // hand and has no flags.
+      const spentFlags = cell.enhancementsSpent ?? [];
+      const names = cell.enhancements
+        .map((n, i) => (spentFlags[i] ? `<tspan class="bs-enh-spent">${esc(n)}</tspan>` : esc(n)))
+        .join(' · ');
       out += `<text class="bs-enh" x="6" y="26" data-tip="${esc(
         (cell.enhancementsWhat ?? []).join(' · '),
-      )}">${esc(cell.enhancements.join(' · '))}</text>`;
+      )}">${names}</text>`;
     }
     if (selectedTrain) {
       /**
@@ -1336,6 +1345,7 @@ export const BOARD_CSS = `
 .bs-mod{font:10px ui-monospace,monospace}
 text.bs-mod{fill:#c8a04a}
 .bs-enh{fill:#7fb0e6;font:9px ui-monospace,monospace}
+.bs-enh-spent{fill:#5b6b7d;text-decoration:line-through}
 .bs-rowlab{fill:#5f6b7a;font:600 9px ui-monospace,monospace;letter-spacing:.1em}
 /* THE EDGE OF THE DISTRICT. Deliberately quiet — it is a boundary, not an action — and dashed, so it
    reads as a line on the table rather than as rail. Nothing is laid outside it (§2.1). */