Analytics 7.1: tempo médio de 1ª resposta WhatsApp no dashboard

Card novo pra clínica e terapeuta com 3 métricas + sparkline:
- Tempo médio (e mediana) de 1ª resposta no período
- Taxa de SLA cumprido — % de respostas dentro do threshold configurado
- Contagem total de respostas no período
- Sparkline da evolução com indicador de tendência (melhorando/piorando)
- Ranking top 5 terapeutas (só no ClinicDashboard)

Filtro de período: 7/30/90 dias (muda granularidade do bucket:
1/7/15 dias pra sparkline com ~5-6 pontos).

Banco (migration 20260423000006):
- Helper interno _first_response_runs: identifica "runs" de inbound
  (sequências do paciente sem outbound entre) e calcula delta até a
  próxima outbound. Evita contar múltiplas mensagens repetidas do
  paciente. responder_id vem de conversation_assignments.
- first_response_stats: agregados (count, avg, median, min, max,
  sla_compliance_rate baseado em conversation_sla_rules).
- first_response_by_therapist: ranking com avg e count por assigned_to.
- first_response_evolution: série temporal com bucket alinhado a
  p_from (p_from + bucket_index * N days). Parâmetro p_bucket_days
  deixa o frontend escolher granularidade por período.

Todas SECURITY DEFINER + GRANT authenticated/service_role. Filtro
opcional por therapist_id nas funções que aplicam.

Frontend:
- useFirstResponseAnalytics composable wraps as 3 RPCs com cache
  via Promise.all paralelo. Helper formatSeconds (Ns/Xmin/Xh).
- FirstResponseCard.vue renderiza sparkline SVG nativo
  (sem lib extra), cor da taxa SLA por threshold (verde ≥80%,
  âmbar ≥50%, vermelho).
- Integrado em ClinicDashboard (visão global) e TherapistDashboard
  (filtrado por ownerId, sem ranking).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/dashboard/FirstResponseCard.vue

@@ -0,0 +1,175 @@
+<!--
+|--------------------------------------------------------------------------
+| Agência PSI — Card de analytics: Tempo médio de 1ª resposta WhatsApp
+|--------------------------------------------------------------------------
+| Usado em ClinicDashboard (global do tenant) e TherapistDashboard
+| (filtrado por user.id). 3 métricas + sparkline de evolução.
+|--------------------------------------------------------------------------
+-->
+<script setup>
+import { ref, computed, onMounted, watch } from 'vue';
+import { useFirstResponseAnalytics } from '@/composables/useFirstResponseAnalytics';
+
+const props = defineProps({
+    therapistId: { type: String, default: null },       // se passar, filtra por user_id
+    showRanking: { type: Boolean, default: true }       // desliga ranking (usado no therapist dashboard)
+});
+
+const api = useFirstResponseAnalytics();
+
+const period = ref('30d');
+
+const PERIOD_OPTIONS = [
+    { label: '7 dias', value: '7d' },
+    { label: '30 dias', value: '30d' },
+    { label: '90 dias', value: '90d' }
+];
+
+async function reload() {
+    await api.loadAll({ period: period.value, therapistId: props.therapistId });
+}
+
+// Sparkline: pega avg_seconds por bucket, normaliza pra 0..1
+const sparkPoints = computed(() => {
+    const buckets = api.evolution.value || [];
+    if (buckets.length < 2) return '';
+    const values = buckets.map((b) => Number(b.avg_seconds) || 0);
+    const max = Math.max(...values);
+    const min = Math.min(...values);
+    const range = max - min || 1;
+    const width = 100;
+    const height = 32;
+    return buckets
+        .map((b, i) => {
+            const x = (i / (buckets.length - 1)) * width;
+            const normalized = ((Number(b.avg_seconds) || 0) - min) / range;
+            // Inverte Y (SVG cresce pra baixo) e deixa margem
+            const y = height - (normalized * (height - 4)) - 2;
+            return `${x.toFixed(2)},${y.toFixed(2)}`;
+        })
+        .join(' ');
+});
+
+const sparkTrend = computed(() => {
+    const buckets = api.evolution.value || [];
+    if (buckets.length < 2) return null;
+    const first = Number(buckets[0].avg_seconds) || 0;
+    const last = Number(buckets[buckets.length - 1].avg_seconds) || 0;
+    if (first === 0) return null;
+    const pct = ((last - first) / first) * 100;
+    return { pct: Math.round(pct), improving: last < first };
+});
+
+// Formata SLA %: se null/undefined → "—"
+const slaComplianceLabel = computed(() => {
+    const rate = api.stats.value?.sla_compliance_rate;
+    if (rate === null || rate === undefined) return '—';
+    return `${rate}%`;
+});
+
+const slaComplianceColor = computed(() => {
+    const rate = Number(api.stats.value?.sla_compliance_rate);
+    if (!rate && rate !== 0) return 'text-[var(--text-color-secondary)]';
+    if (rate >= 80) return 'text-emerald-600';
+    if (rate >= 50) return 'text-amber-600';
+    return 'text-red-600';
+});
+
+onMounted(reload);
+watch(() => [period.value, props.therapistId], reload);
+</script>
+
+<template>
+    <div class="dash-card rounded-md overflow-hidden">
+        <div class="dash-card__head gap-2.5 p-3 flex items-center">
+            <div class="grid place-items-center w-10 h-10 rounded-md shrink-0 bg-emerald-500/10 text-emerald-600 dark:text-emerald-400">
+                <i class="pi pi-stopwatch text-lg" />
+            </div>
+            <div class="flex-1 min-w-0">
+                <div class="dash-card__title">Tempo de 1ª resposta</div>
+                <div class="dash-card__sub">{{ therapistId ? 'Suas respostas no WhatsApp' : 'Respostas da clínica no WhatsApp' }}</div>
+            </div>
+            <Select v-model="period" :options="PERIOD_OPTIONS" optionLabel="label" optionValue="value" class="!text-xs" :pt="{ root: { style: 'width: 7rem' } }" />
+        </div>
+
+        <div class="p-3 flex flex-col gap-3">
+            <!-- Loading state -->
+            <div v-if="api.loading.value" class="flex justify-center py-6">
+                <ProgressSpinner style="width: 32px; height: 32px" />
+            </div>
+
+            <!-- Sem dados -->
+            <div v-else-if="!api.hasData.value" class="text-center py-6 text-sm text-[var(--text-color-secondary)]">
+                <i class="pi pi-inbox text-2xl opacity-40 block mb-2" />
+                Sem respostas registradas no período.
+            </div>
+
+            <!-- Métricas -->
+            <template v-else>
+                <div class="grid grid-cols-3 gap-2">
+                    <div class="rounded-md border border-[var(--surface-border)] p-2.5 flex flex-col">
+                        <span class="text-[0.65rem] uppercase tracking-wide text-[var(--text-color-secondary)]">Média</span>
+                        <span class="text-lg font-bold">{{ api.formatSeconds(api.stats.value?.avg_seconds) }}</span>
+                        <span class="text-[0.65rem] text-[var(--text-color-secondary)]">mediana {{ api.formatSeconds(api.stats.value?.median_seconds) }}</span>
+                    </div>
+                    <div class="rounded-md border border-[var(--surface-border)] p-2.5 flex flex-col">
+                        <span class="text-[0.65rem] uppercase tracking-wide text-[var(--text-color-secondary)]">SLA cumprido</span>
+                        <span class="text-lg font-bold" :class="slaComplianceColor">{{ slaComplianceLabel }}</span>
+                        <span class="text-[0.65rem] text-[var(--text-color-secondary)]">
+                            <template v-if="api.stats.value?.sla_threshold_seconds">
+                                ≤ {{ Math.round(api.stats.value.sla_threshold_seconds / 60) }}min
+                            </template>
+                            <template v-else>SLA desativado</template>
+                        </span>
+                    </div>
+                    <div class="rounded-md border border-[var(--surface-border)] p-2.5 flex flex-col">
+                        <span class="text-[0.65rem] uppercase tracking-wide text-[var(--text-color-secondary)]">Respostas</span>
+                        <span class="text-lg font-bold">{{ api.stats.value?.runs_count }}</span>
+                        <span class="text-[0.65rem] text-[var(--text-color-secondary)]">no período</span>
+                    </div>
+                </div>
+
+                <!-- Sparkline -->
+                <div v-if="sparkPoints" class="flex items-center gap-3 border-t border-[var(--surface-border)] pt-2">
+                    <svg viewBox="0 0 100 32" preserveAspectRatio="none" class="h-8 flex-1">
+                        <polyline
+                            :points="sparkPoints"
+                            fill="none"
+                            stroke="currentColor"
+                            stroke-width="1.5"
+                            stroke-linecap="round"
+                            stroke-linejoin="round"
+                            :class="sparkTrend?.improving ? 'text-emerald-500' : 'text-orange-500'"
+                        />
+                    </svg>
+                    <div v-if="sparkTrend" class="flex flex-col items-end text-[0.7rem] leading-tight">
+                        <span :class="sparkTrend.improving ? 'text-emerald-600' : 'text-orange-600'" class="font-semibold">
+                            {{ sparkTrend.improving ? '↓' : '↑' }} {{ Math.abs(sparkTrend.pct) }}%
+                        </span>
+                        <span class="text-[var(--text-color-secondary)]">
+                            {{ sparkTrend.improving ? 'melhorando' : 'piorando' }}
+                        </span>
+                    </div>
+                </div>
+
+                <!-- Ranking (só clínica) -->
+                <div v-if="showRanking && api.ranking.value.length > 0" class="border-t border-[var(--surface-border)] pt-2">
+                    <div class="text-[0.65rem] uppercase tracking-wide text-[var(--text-color-secondary)] mb-1.5">Ranking terapeutas</div>
+                    <div class="flex flex-col gap-1">
+                        <div v-for="(t, i) in api.ranking.value.slice(0, 5)" :key="t.therapist_id"
+                             class="flex items-center justify-between text-xs py-1 px-1.5 rounded hover:bg-[var(--surface-hover)]">
+                            <span class="flex items-center gap-2 min-w-0 flex-1">
+                                <span class="font-mono text-[0.65rem] text-[var(--text-color-secondary)] w-4">{{ i + 1 }}.</span>
+                                <span class="font-mono text-[0.68rem] truncate">{{ t.therapist_id.slice(0, 8) }}…</span>
+                            </span>
+                            <span class="flex items-center gap-2 text-[var(--text-color-secondary)]">
+                                <span>{{ t.runs_count }}</span>
+                                <span class="font-mono">{{ api.formatSeconds(t.avg_seconds) }}</span>
+                            </span>
+                        </div>
+                    </div>
+                </div>
+            </template>
+        </div>
+    </div>
+</template>