feat(hunting): show cleared encounters and resume interrupted fights

The hunt screen kept whatever roll was last in memory, so a player coming
back from a fight saw every encounter as fresh. Encounters now carry their
own status, which the combat module advances as fights start and end.

- hunt_encounters.status replaces consumed_at, which only recorded that a
  fight had begun and could not distinguish a win from a loss
- a lost fight hands the encounter back as AVAILABLE, so it can be retried;
  the unique index tying one combat to one encounter goes with it
- GET /hunts/active serves the resumable hunt, which the hunt page adopts on
  entry rather than trusting its in-memory roll
- defeated encounters are crossed out and lose their hover and attack action
- a fresh page load rejoins a combat the server still holds open

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/web/src/app/features/hunting/encounter-card/encounter-card.component.scss

@@ -21,6 +21,16 @@
   background-size: 100% 100%;
 }
 
+/* A settled encounter is out of play, so the card recedes: the artwork loses
+   its colour and the whole frame dims. */
+.encounter-card--settled .encounter-card__artwork {
+  filter: grayscale(0.85) brightness(0.6);
+}
+
+.encounter-card--settled {
+  opacity: 0.78;
+}
+
 /* ---------- crest ---------- */
 
 .encounter-card__crest {
@@ -54,6 +64,17 @@
   place-items: end center;
 }
 
+/* Sits over the artwork panel rather than the whole card, so the name and
+   the danger badge stay readable under it. */
+.encounter-card__defeated-mark {
+  position: absolute;
+  inset: 6%;
+  inline-size: 88%;
+  block-size: 88%;
+  object-fit: contain;
+  pointer-events: none;
+}
+
 .encounter-card__artwork {
   inline-size: 100%;
   block-size: 100%;
@@ -126,15 +147,20 @@
   text-shadow: 0 0.1rem 0.35rem rgb(0 0 0 / 0.85);
 }
 
-.encounter-card__attack:hover {
+.encounter-card__attack:enabled:hover {
   color: #f4ecda;
   box-shadow: inset 0 0 1.1rem rgb(150 200 245 / 0.5);
 }
 
-.encounter-card__attack:active {
+.encounter-card__attack:enabled:active {
   box-shadow: inset 0 0.15rem 0.7rem rgb(0 0 0 / 0.6);
 }
 
+.encounter-card__attack:disabled {
+  color: rgb(214 206 190 / 0.45);
+  cursor: default;
+}
+
 .encounter-card__attack:focus-visible {
   outline: 2px solid var(--ar-blue);
   outline-offset: -3px;
@@ -145,7 +171,7 @@
     transition: filter var(--ar-motion-base);
   }
 
-  .encounter-card:hover {
+  .encounter-card:not(.encounter-card--settled):hover {
     filter: drop-shadow(0 0 0.9rem rgb(214 178 107 / 0.3));
   }