feat(kiwi-fe): add OrchUsagePill component with calm low-budget state

frontend/src/components/OrchUsagePill.vue

@@ -0,0 +1,70 @@
+<template>
+  <!-- Only shown when user has opted in AND a lifetime key is present (usage != null) -->
+  <div
+    v-if="enabled && usage !== null"
+    class="orch-usage-pill"
+    :class="{ 'orch-usage-pill--low': isLow }"
+    :title="`Cloud recipe calls this period: ${usage.calls_used} of ${usage.calls_total}`"
+  >
+    <span class="orch-usage-pill__label">
+      {{ usage.calls_used + usage.topup_calls }} / {{ usage.calls_total }} calls
+      <span class="orch-usage-pill__reset">· resets {{ resetsLabel }}</span>
+    </span>
+    <a
+      class="orch-usage-pill__topup"
+      href="https://circuitforge.tech/kiwi/topup"
+      target="_blank"
+      rel="noopener"
+    >Topup</a>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import { useOrchUsage } from '@/composables/useOrchUsage'
+
+const { usage, enabled, resetsLabel } = useOrchUsage()
+
+// Warn visually when less than 20% remains — calm yellow only, no red/panic
+const isLow = computed(() => {
+  if (!usage.value || usage.value.calls_total === 0) return false
+  const remaining = usage.value.calls_total - usage.value.calls_used + usage.value.topup_calls
+  return remaining / usage.value.calls_total < 0.2
+})
+</script>
+
+<style scoped>
+.orch-usage-pill {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--spacing-xs);
+  padding: 0.25rem 0.625rem;
+  border-radius: 999px;
+  font-size: var(--font-size-sm);
+  background: var(--color-bg-secondary);
+  color: var(--color-text-secondary);
+  border: 1px solid var(--color-border);
+}
+
+.orch-usage-pill--low {
+  background: var(--color-warning-bg);
+  border-color: var(--color-warning-border);
+  color: var(--color-warning);
+}
+
+.orch-usage-pill__reset {
+  opacity: 0.7;
+}
+
+.orch-usage-pill__topup {
+  color: var(--color-primary);
+  text-decoration: none;
+  font-weight: 500;
+  white-space: nowrap;
+  margin-left: var(--spacing-xs);
+}
+
+.orch-usage-pill__topup:hover {
+  text-decoration: underline;
+}
+</style>