Camp: reject (not downgrade) sub-par camps; map: show visited path

Camp rest rules:
  • Standard camp now rejects an uncleared room with a clear message
    instead of silently downgrading to rough — let the player make the
    call rather than spending supplies on a worse rest they didn't pick.
  • campLocationCheck treats a room with a resolved (non-active) combat
    session as cleared, so the natural "just killed, not yet advanced"
    pause still qualifies for a standard camp.
  • Reword fortified-camp gating + babysit help to "zone boss defeated"
    (cache sites aren't a thing yet) so the requirement isn't misleading.

Map: renderVisitedPath adds a 1-indexed breadcrumb of visited rooms to
!expedition map, so players can reference rooms by index (e.g. !revisit 2).

(cherry picked from commit a38fc77eed888e9790c7a7cff24369b98910b43e)

internal/plugin/dnd_expedition_map.go

@@ -119,6 +119,9 @@ func (p *AdventurePlugin) handleExpeditionMapCmd(ctx MessageContext, _ string) e
 			b.WriteString(renderZoneGraphMap(g, run))
 			b.WriteString("\n```\n")
 			b.WriteString("_E=Entry  ?=Exploration  T=Trap  ★=Elite  ☠=Boss  ⚿=Secret · ✓ cleared  ▶ here  · pending  ╳ locked_")
+			if path := renderVisitedPath(g, run); path != "" {
+				b.WriteString("\n**Path:** " + path)
+			}
 			if chain != "" {
 				b.WriteString("\n_Regions: ")
 				b.WriteString(renderRegionLegend(exp))