feat: add EncounterCard component for hunt encounter selection

Task 9 of Playable Slice 0.2 (First Hunt). Artwork-forward encounter
card reusing travel-panel's dark-fantasy panel chrome (tokens, border,
gradient, button style). Emits encounter.id (never monster.key) on
Angreifen click, preserving the frontend security boundary.

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

@@ -0,0 +1,18 @@
+import { Component, EventEmitter, Input, Output } from '@angular/core';
+import { HuntEncounter } from '../../../core/api/game-api.models';
+import { DangerBadgeComponent } from '../../../shared/danger-badge/danger-badge.component';
+
+@Component({
+  selector: 'app-encounter-card',
+  imports: [DangerBadgeComponent],
+  templateUrl: './encounter-card.component.html',
+  styleUrl: './encounter-card.component.scss',
+})
+export class EncounterCardComponent {
+  @Input({ required: true }) encounter!: HuntEncounter;
+  @Output() readonly attack = new EventEmitter<string>();
+
+  protected onAttack(): void {
+    this.attack.emit(this.encounter.id);
+  }
+}