Add Settings 'Send Test Digest Email' button (admin) (v0.1.0:75)

Surface the digest test-send endpoint as a clickable admin control so it can be
exercised on the box without curl. Calls POST /api/admin/digest/test-email and
toasts the result (or a 'configure SMTP first' hint). JSX parse-checked.

AGENTS.md

@@ -104,7 +104,7 @@ _Phase 0 substrate + Phase 1 thesis/outreach are built; **deployed box is v0.1.0
 
 - **Working (all draft-only):** CRM + ingest (chunk→embed→Qdrant + retrieval) + redaction boundary; Gmail capture (DWD) + email-activity propose→approve; Thesis Workshop + Architect (Claude) with dual-approval gate; Outreach Draft Assistant + follow-up radar + per-user voice + Tier-B in-thread Gmail draft creation.
 - **Deployed & verified live (2026-06-13):** v0.1.0:74 is **installed and healthy on the box** (`$START9_BOX_HOST` / immense-voyage.local). Grant confirms login works; `/assets/` traversal 404s live (plain + URL-encoded), root health 200. On boot, `ensure_thesis_v2_promoted` makes the v2.0 reserve-asset spine the working *approved* spine (node-level, reversible).
-- **Repo ahead of the box (committed, NOT yet built/deployed):** the box is pristine v74; `main` is at **v0.1.0:75** and carries two unshipped batches. (a) Post-v74: the **list-view soft-delete aggregate fix** (`server.py`: org `contact_count`/`total_funded`, contacts `comm_count`/`last_contact_date` now filter `deleted_at`), three **regression tests**, and an **aggregate test runner**. (b) **v0.1.0:75 — daily-digest Phase A** (outbound SMTP send): the **`configureDigestSmtp`** Start9 action writes a per-package SMTP account to `/data/secrets/smtp/*` (password over stdin; independent of any StartOS system-wide SMTP), `docker_entrypoint.sh` exports `SMTP_*`, `backend/smtp_send.py` (stdlib smtplib) sends, and admin **`POST /api/admin/digest/test-email`** proves the pipe (recipients restricted to the active-admin set — not an open relay). One `make` ships both batches.
+- **Repo ahead of the box (committed, NOT yet built/deployed):** the box is pristine v74; `main` is at **v0.1.0:75** and carries two unshipped batches. (a) Post-v74: the **list-view soft-delete aggregate fix** (`server.py`: org `contact_count`/`total_funded`, contacts `comm_count`/`last_contact_date` now filter `deleted_at`), three **regression tests**, and an **aggregate test runner**. (b) **v0.1.0:75 — daily-digest Phase A** (outbound SMTP send): the **`configureDigestSmtp`** Start9 action writes a per-package SMTP account to `/data/secrets/smtp/*` (password over stdin; independent of any StartOS system-wide SMTP), `docker_entrypoint.sh` exports `SMTP_*`, `backend/smtp_send.py` (stdlib smtplib) sends, and admin **`POST /api/admin/digest/test-email`** proves the pipe (recipients restricted to the active-admin set — not an open relay), surfaced as a **Settings → Admin "Send Test Digest Email" button**. One `make` ships both batches.
 - **Shipped in v0.1.0:74** (security/privacy hardening from the 2026-06-12 full-eval; report in `EVALUATION.md`): closed a pre-auth `/assets/` path traversal (could read crm.db / JWT secret / Gmail key); wired the local-Qwen NER backstop into the outreach redaction boundary (free-prose email bodies were reaching Claude with unknown names in the clear); added `deleted_at IS NULL` to every get-by-id + nested sub-select read path. Verified locally (py_compile, query exec, redaction/outreach tests, containment logic) + two reviewer passes.
 - **Tests (2026-06-15):** **18/18 backend tests green** via `python3 backend/run_tests.py` (+`test_smtp_send.py`/`test_smtp_endpoint.py` this session). `py_compile` clean; the s9pk TypeScript typechecks (`cd start9/0.4 && npm run check`, deps installed); `docker_entrypoint.sh` passes `sh -n`. The 2 stale thesis tests stay fixed (seed structure in `docs/guides/thesis.md`).
 - **Decided, not yet built:** CRM as canonical thesis backbone with the signal-engine reading from it (reconciliation unwired); reply-all for Tier-B drafts (drafts currently reply to the LP only).