feat(kanban): bocadillo agente + PDF descargable en reporte diario (issue 0094)

Anade tres capas sobre el reporte diario del issue 0093:

1) Bocadillo del agente: cuadro azul encima de "Tareas hechas" con un
   resumen en lenguaje natural (max 4 frases) generado por claude -p
   sobre el JSON del reporte. Botones Regenerar e icono Settings.

2) Settings del prompt: modal con textarea editable para el template
   del agente (key=daily_report_prompt). Compartido por todos los
   usuarios. Boton Restablecer por defecto.

3) PDF descargable: boton que abre ventana nueva con HTML imprimible
   (estilo A4, KPIs filtrados, tabla con enlaces absolutos por card).
   Permite compartir el listado de tareas hechas con los solicitantes.

Backend:
- Migration 013 anade tablas daily_summaries y settings; seed del
  prompt por defecto en castellano.
- daily_summary.go con GetSetting/SetSetting, GetDailySummary/Upsert,
  runClaudePrompt (envuelve claude -p) y GenerateDailySummary que
  orquesta DailyReportFor + plantilla + claude + persist.
- Nuevos endpoints:
  * GET  /api/reports/daily/summary
  * POST /api/reports/daily/summary
  * GET  /api/settings/{key}
  * PUT  /api/settings/{key}

Frontend:
- api.ts: getDailySummary, generateDailySummary, getSetting, setSetting.
- DailyReport.tsx: estado de summary, settingsOpen, promptDraft,
  filterRequester, filterAssignee, filteredDoneCards, exportPDF.
- Bocadillo con IconSparkles + IconRefresh + IconSettings.
- Modal de prompt con Guardar/Cancelar/Reset.
- Filtros Select por solicitante y asignado encima de la tabla.
- exportPDF abre window.open con HTML self-contained que incluye
  enlaces ${origin}/?card=${id} y window.print() automatico.

E2E nuevo (daily-summary-pdf.spec.ts): CRUD del setting, GET summary
shape, presencia del boton PDF/Settings/Regenerar en el modal. No
invoca claude real (binario externo, no disponible en CI).

Suite completa 11/11 pasa.

frontend/src/components/DailyReport.tsx

@@ -1,19 +1,25 @@
 import {
+  ActionIcon,
   Alert,
   Avatar,
   Badge,
   Box,
+  Button,
   Card as MCard,
   Divider,
   Group,
   Loader,
+  Modal,
   Paper,
   ScrollArea,
+  Select,
   SimpleGrid,
   Stack,
   Table,
   Text,
+  Textarea,
   Title,
+  Tooltip,
   UnstyledButton,
 } from "@mantine/core";
 import { BarChart } from "@mantine/charts";
@@ -23,14 +29,25 @@ import {
   IconCalendarStats,
   IconCheck,
   IconClock,
+  IconDownload,
   IconHourglass,
   IconLock,
   IconPlus,
   IconRefresh,
+  IconSettings,
+  IconSparkles,
   IconTrendingUp,
 } from "@tabler/icons-react";
 import { useEffect, useMemo, useState } from "react";
-import { dailyReport, type DailyReport as Report } from "../api";
+import {
+  dailyReport,
+  generateDailySummary,
+  getDailySummary,
+  getSetting,
+  setSetting,
+  type DailyReport as Report,
+  type DailySummary,
+} from "../api";
 import { formatDuration } from "./format";
 import { tagColor } from "./colors";
 
@@ -39,6 +56,10 @@ interface Props {
   onJumpToCard?: (cardId: string) => void;
 }
 
+const PROMPT_KEY = "daily_report_prompt";
+const PROMPT_DEFAULT =
+  "Eres un coach de equipo. Resume el reporte diario en un MAXIMO de 4 frases cortas, mencionando: (1) total de tareas hechas y quien destaco, (2) cualquier card reabierta o deadline vencido que merezca atencion, (3) cards estancadas criticas (30+ dias) si las hay, (4) una frase corta de animo o aviso si toca. Tono natural, primera persona del plural, sin emojis. No inventes datos; usa solo los del JSON del reporte.";
+
 function fmtDate(s: string): string {
   try {
     const d = new Date(s + "T00:00:00");
@@ -134,6 +155,13 @@ function RankingList<T extends { name: string; count: number; user_id?: string }
 export function DailyReportView({ date, onJumpToCard }: Props) {
   const [data, setData] = useState<Report | null>(null);
   const [err, setErr] = useState<string | null>(null);
+  const [summary, setSummary] = useState<DailySummary | null>(null);
+  const [summaryLoading, setSummaryLoading] = useState(false);
+  const [summaryErr, setSummaryErr] = useState<string | null>(null);
+  const [settingsOpen, setSettingsOpen] = useState(false);
+  const [promptDraft, setPromptDraft] = useState("");
+  const [filterRequester, setFilterRequester] = useState<string | null>(null);
+  const [filterAssignee, setFilterAssignee] = useState<string | null>(null);
 
   useEffect(() => {
     setData(null);
@@ -141,8 +169,43 @@ export function DailyReportView({ date, onJumpToCard }: Props) {
     dailyReport(date)
       .then(setData)
       .catch((e) => setErr((e as Error).message));
+    setSummary(null);
+    setSummaryErr(null);
+    getDailySummary(date)
+      .then((s) => setSummary(s.exists ? s : null))
+      .catch(() => {});
   }, [date]);
 
+  const regenerateSummary = async () => {
+    setSummaryLoading(true);
+    setSummaryErr(null);
+    try {
+      const s = await generateDailySummary(date);
+      setSummary({ ...s, exists: true });
+    } catch (e) {
+      setSummaryErr((e as Error).message);
+    } finally {
+      setSummaryLoading(false);
+    }
+  };
+
+  const openSettings = async () => {
+    try {
+      const s = await getSetting(PROMPT_KEY);
+      setPromptDraft(s.value || PROMPT_DEFAULT);
+    } catch {
+      setPromptDraft(PROMPT_DEFAULT);
+    }
+    setSettingsOpen(true);
+  };
+
+  const saveSettings = async () => {
+    await setSetting(PROMPT_KEY, promptDraft);
+    setSettingsOpen(false);
+  };
+
+  const resetSettings = () => setPromptDraft(PROMPT_DEFAULT);
+
   const hourlyChartData = useMemo(() => {
     if (!data) return [];
     return data.hourly_moves.map((n, h) => ({
@@ -151,6 +214,119 @@ export function DailyReportView({ date, onJumpToCard }: Props) {
     }));
   }, [data]);
 
+  const requesterOptions = useMemo(() => {
+    if (!data) return [];
+    const set = new Set<string>();
+    for (const c of data.done_cards) if (c.requester) set.add(c.requester);
+    return Array.from(set).sort();
+  }, [data]);
+
+  const assigneeOptions = useMemo(() => {
+    if (!data) return [];
+    const m = new Map<string, string>();
+    for (const c of data.done_cards) {
+      if (c.assignee_id) m.set(c.assignee_id, c.assignee_name || c.assignee_id);
+    }
+    return Array.from(m.entries()).map(([value, label]) => ({ value, label }));
+  }, [data]);
+
+  const filteredDoneCards = useMemo(() => {
+    if (!data) return [];
+    return data.done_cards.filter((c) => {
+      if (filterRequester && c.requester !== filterRequester) return false;
+      if (filterAssignee && c.assignee_id !== filterAssignee) return false;
+      return true;
+    });
+  }, [data, filterRequester, filterAssignee]);
+
+  const exportPDF = () => {
+    if (!data) return;
+    const win = window.open("", "_blank");
+    if (!win) return;
+    const origin = window.location.origin;
+    const dateLabel = (() => {
+      try {
+        return new Date(data.date + "T00:00:00").toLocaleDateString("es-ES", {
+          weekday: "long",
+          day: "2-digit",
+          month: "long",
+          year: "numeric",
+        });
+      } catch {
+        return data.date;
+      }
+    })();
+    const filterSub: string[] = [];
+    if (filterRequester) filterSub.push(`solicitante=${filterRequester}`);
+    if (filterAssignee) {
+      const a = assigneeOptions.find((o) => o.value === filterAssignee);
+      filterSub.push(`asignado=${a?.label || filterAssignee}`);
+    }
+    const escape = (s: string) =>
+      s.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/"/g, "&quot;");
+    const rows = filteredDoneCards
+      .map((c) => {
+        const tags = (c.tags || []).map(escape).join(", ");
+        const link = `${origin}/?card=${c.id}`;
+        return `<tr>
+          <td class="num">${String(c.seq_num).padStart(5, "0")}</td>
+          <td><a href="${link}">${escape(c.title)}</a></td>
+          <td>${escape(c.requester || "")}</td>
+          <td>${escape(c.assignee_name || "")}</td>
+          <td>${escape(tags)}</td>
+          <td class="num">${formatDuration(c.lead_time_ms)}</td>
+        </tr>`;
+      })
+      .join("");
+    const html = `<!doctype html>
+<html lang="es"><head><meta charset="utf-8" />
+<title>Reporte ${data.date}</title>
+<style>
+  @page { margin: 18mm 15mm; }
+  body { font-family: system-ui, sans-serif; color: #222; }
+  h1 { font-size: 18pt; margin-bottom: 4px; }
+  .sub { color: #666; font-size: 10pt; margin-bottom: 16px; }
+  .kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 18px; }
+  .kpi { border: 1px solid #ddd; border-radius: 6px; padding: 8px; }
+  .kpi .l { font-size: 8pt; color: #888; text-transform: uppercase; }
+  .kpi .v { font-size: 16pt; font-weight: 700; }
+  table { width: 100%; border-collapse: collapse; font-size: 9pt; }
+  th, td { border-bottom: 1px solid #e5e5e5; padding: 6px 4px; text-align: left; vertical-align: top; }
+  th { background: #f5f5f5; font-weight: 600; }
+  td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
+  a { color: #1c7ed6; text-decoration: none; }
+  a:hover { text-decoration: underline; }
+  footer { margin-top: 20px; font-size: 8pt; color: #888; }
+</style></head><body>
+<h1>Reporte diario · ${escape(dateLabel)}</h1>
+<div class="sub">${escape(data.date)} · ${escape(data.tz)}${
+      filterSub.length ? " · filtros: " + filterSub.map(escape).join(", ") : ""
+    }</div>
+<div class="kpis">
+  <div class="kpi"><div class="l">Hechas</div><div class="v">${filteredDoneCards.length}</div></div>
+  <div class="kpi"><div class="l">Lead time avg</div><div class="v">${formatDuration(data.lead_time.avg_ms)}</div></div>
+  <div class="kpi"><div class="l">Deadlines on-time</div><div class="v">${data.deadlines.met}/${data.deadlines.met + data.deadlines.missed}</div></div>
+  <div class="kpi"><div class="l">Reabiertas</div><div class="v">${data.kpis.reopened}</div></div>
+</div>
+${summary?.summary ? `<p style="border-left:4px solid #1c7ed6; padding:8px 12px; background:#eef6fd; border-radius:4px;">${escape(summary.summary)}</p>` : ""}
+<table>
+  <thead><tr>
+    <th class="num">#</th>
+    <th>Titulo</th>
+    <th>Solicitante</th>
+    <th>Asignado</th>
+    <th>Tags</th>
+    <th class="num">Lead time</th>
+  </tr></thead>
+  <tbody>${rows || '<tr><td colspan="6" style="text-align:center;color:#888;">Sin tareas que cumplan el filtro.</td></tr>'}</tbody>
+</table>
+<footer>Generado por kanban · ${escape(origin)}</footer>
+<script>window.addEventListener("load", () => setTimeout(() => window.print(), 250));</script>
+</body></html>`;
+    win.document.write(html);
+    win.document.close();
+  };
+
   if (err) {
     return (
       <Alert color="red" icon={<IconAlertTriangle size={14} />}>
@@ -234,14 +410,63 @@ export function DailyReportView({ date, onJumpToCard }: Props) {
         />
       </SimpleGrid>
 
+      {/* Bocadillo de agente — encima de tareas hechas */}
+      <Paper
+        withBorder
+        radius="md"
+        p="sm"
+        bg="var(--mantine-color-blue-light)"
+        style={{ borderLeftWidth: 4, borderLeftColor: "var(--mantine-color-blue-6)" }}
+      >
+        <Group justify="space-between" align="flex-start" wrap="nowrap">
+          <Group gap={6} align="flex-start" wrap="nowrap" style={{ flex: 1, minWidth: 0 }}>
+            <IconSparkles size={18} color="var(--mantine-color-blue-6)" style={{ flexShrink: 0, marginTop: 2 }} />
+            <Box style={{ flex: 1 }}>
+              {summaryErr && (
+                <Alert color="red" mb={4} icon={<IconAlertTriangle size={14} />}>
+                  {summaryErr}
+                </Alert>
+              )}
+              {summaryLoading ? (
+                <Group gap={6}><Loader size="xs" /><Text size="sm" c="dimmed">Generando resumen…</Text></Group>
+              ) : summary?.summary ? (
+                <>
+                  <Text size="sm" style={{ whiteSpace: "pre-wrap" }}>{summary.summary}</Text>
+                  {summary.generated_at && (
+                    <Text size="xs" c="dimmed" mt={4}>
+                      Generado {new Date(summary.generated_at).toLocaleString()} · {summary.model}
+                    </Text>
+                  )}
+                </>
+              ) : (
+                <Text size="sm" c="dimmed" fs="italic">Aun no hay resumen del dia. Pulsa "Generar".</Text>
+              )}
+            </Box>
+          </Group>
+          <Group gap={4} wrap="nowrap">
+            <Tooltip label={summary?.exists ? "Regenerar" : "Generar"} withArrow>
+              <ActionIcon variant="subtle" color="blue" onClick={regenerateSummary} loading={summaryLoading} aria-label="Regenerar resumen">
+                <IconRefresh size={16} />
+              </ActionIcon>
+            </Tooltip>
+            <Tooltip label="Configurar prompt" withArrow>
+              <ActionIcon variant="subtle" color="gray" onClick={openSettings} aria-label="Configurar prompt">
+                <IconSettings size={16} />
+              </ActionIcon>
+            </Tooltip>
+          </Group>
+        </Group>
+      </Paper>
+
       <MCard withBorder radius="md" p="sm">
-        <Group justify="space-between" mb="xs">
-          <Text fw={600} size="sm">
-            Tareas hechas
-          </Text>
-          <Group gap={6}>
+        <Group justify="space-between" mb="xs" wrap="wrap" gap={6}>
+          <Group gap={6} wrap="wrap">
+            <Text fw={600} size="sm">
+              Tareas hechas
+            </Text>
             <Badge size="xs" variant="light">
-              N {k.done}
+              N {filteredDoneCards.length}
+              {filteredDoneCards.length !== data.done_cards.length ? ` / ${data.done_cards.length}` : ""}
             </Badge>
             <Text size="xs" c="dimmed">
               Lead time avg {data.lead_time.samples > 0 ? formatDuration(data.lead_time.avg_ms) : "—"} · p50{" "}
@@ -249,8 +474,41 @@ export function DailyReportView({ date, onJumpToCard }: Props) {
               {data.lead_time.samples > 0 ? formatDuration(data.lead_time.p95_ms) : "—"}
             </Text>
           </Group>
+          <Group gap={6} wrap="nowrap">
+            <Select
+              size="xs"
+              placeholder="Solicitante"
+              data={requesterOptions}
+              value={filterRequester}
+              onChange={setFilterRequester}
+              clearable
+              searchable
+              style={{ width: 160 }}
+              aria-label="Filtrar por solicitante"
+            />
+            <Select
+              size="xs"
+              placeholder="Asignado"
+              data={assigneeOptions}
+              value={filterAssignee}
+              onChange={setFilterAssignee}
+              clearable
+              searchable
+              style={{ width: 160 }}
+              aria-label="Filtrar por asignado"
+            />
+            <Button
+              size="xs"
+              leftSection={<IconDownload size={14} />}
+              variant="light"
+              onClick={exportPDF}
+              data-test="daily-report-pdf"
+            >
+              PDF
+            </Button>
+          </Group>
         </Group>
-        {data.done_cards.length === 0 ? (
+        {filteredDoneCards.length === 0 ? (
           <Text size="xs" c="dimmed">
             Sin hechas en este dia.
           </Text>
@@ -268,7 +526,7 @@ export function DailyReportView({ date, onJumpToCard }: Props) {
                 </Table.Tr>
               </Table.Thead>
               <Table.Tbody>
-                {data.done_cards.map((c) => (
+                {filteredDoneCards.map((c) => (
                   <Table.Tr key={c.id}>
                     <Table.Td>
                       <Text size="xs" c="dimmed">
@@ -518,6 +776,35 @@ export function DailyReportView({ date, onJumpToCard }: Props) {
           </Text>
         </Group>
       </Group>
+
+      <Modal opened={settingsOpen} onClose={() => setSettingsOpen(false)} title="Prompt del agente diario" size="lg" zIndex={500}>
+        <Stack gap="sm">
+          <Text size="xs" c="dimmed">
+            Plantilla que el agente recibe junto al JSON del reporte. Compartida por todos los usuarios.
+          </Text>
+          <Textarea
+            autosize
+            minRows={6}
+            maxRows={20}
+            value={promptDraft}
+            onChange={(e) => setPromptDraft(e.currentTarget.value)}
+            data-test="daily-report-prompt"
+          />
+          <Group justify="space-between">
+            <Button size="xs" variant="subtle" onClick={resetSettings}>
+              Restablecer por defecto
+            </Button>
+            <Group gap={6}>
+              <Button size="xs" variant="subtle" color="gray" onClick={() => setSettingsOpen(false)}>
+                Cancelar
+              </Button>
+              <Button size="xs" onClick={saveSettings} data-test="daily-report-prompt-save">
+                Guardar
+              </Button>
+            </Group>
+          </Group>
+        </Stack>
+      </Modal>
     </Stack>
   );
 }