Phase 7: daily summary and read-only Hub API (AUD-73)

- internal/hub: project side of the frozen ask-contract. GET /capabilities,
  read-only POST /ask answerer (no LLM, <3s), and the outbound POST /notify
  client.
- internal/apprise: daily-summary delivery through the house Apprise API.
- internal/summary: deterministic plain-text daily summary builder.
- internal/store: CountByCategory, MessagesByCategory, and summary CRUD.
- internal/server: /capabilities and /ask (bearer-token protected), plus the
  Reports screen (/reports, build, send, delete).
- main.go: -summary, -summary-send, and -notify CLI entry points for n8n.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

web/static/app.css

@@ -531,3 +531,25 @@ a:hover { text-decoration: underline; }
   .unsub-row { flex-direction: column; align-items: stretch; }
   .rules-version { flex-direction: column; align-items: stretch; }
 }
+
+/* Phase 7 (FR-10): Reports screen and daily summary. */
+.report {
+  border: 1px solid var(--hairline);
+  border-radius: 4px;
+  padding: var(--space-sm);
+  margin-bottom: var(--space-md);
+  display: grid;
+  gap: var(--space-xs);
+}
+.report:last-child { margin-bottom: 0; }
+.report-head { display: flex; align-items: center; gap: var(--space-sm); flex-wrap: wrap; }
+.report-text {
+  margin: 0;
+  padding: var(--space-sm);
+  background: var(--surface-2, var(--canvas));
+  border-radius: 4px;
+  font: var(--type-caption);
+  color: var(--ink-secondary);
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
+}