Retire the Pipeline page's "+ New Opportunity" button (v0.1.0:88)

Opportunities are now born only from a fundraising-grid investor row
("+ Pipeline"), which matches how the team works — they live in the grid,
not on the board. The old "+ New Opportunity" button created a deal by
picking a contact, a path that contradicts the grid-is-canonical model and
the contact-vs-investor framing.

Remove the button, its create-by-contact modal, the now-dead handler/state,
and the Pipeline page's unused /api/contacts fetch. Replace the button with a
muted "Add deals from the Fundraising Grid" hint. The board is now a view +
stage-management surface. Frontend-only; no backend or schema change.

Render-smoke green.

ROADMAP.md

@@ -179,6 +179,7 @@ Open design questions (settled at build time): send time = **6 PM box-local** (c
 - Revisit the stray contact-create side-door (the "Create Opportunity" modal `POST /api/contacts`) once the grid-driven flow exists.
 
 **As built (decisions locked with Grant 2026-06-17):** UX = **row action + seed modal** ("Add to Pipeline" per grid row → captures primary contact / target fund / expected amount / stage / probability). The durable link is `opportunities.fundraising_investor_id` (**migration 0005**, additive + reversible); "is in pipeline?" / "what stage?" are **derived from a live opp join**, never a denormalized flag (no drift). **Ownership split:** the grid owns whether the link exists + the seed; the **board owns stage/probability/owner/close/next-step** — a grid save never reseeds a live opp (`POST /api/fundraising/pipeline/link` is idempotent: one live opp/investor, re-link returns the existing one). Contact is **reused from the grid's synced `fundraising_contacts.contact_id`** — the `POST /api/contacts` side-door is **gone**. Grid `lead` → opp owner (fallback acting user). Two **read-only** grid columns (Pipeline action + Pipeline Stage) injected on read; their row values are stripped on write so they never persist or dirty the autosave. **Remove from pipeline** (`POST .../unlink`) **soft-deletes the opp; the grid row is left fully intact** (Grant's explicit ask). Deleting an investor from the grid archives its orphaned opp (`reconcile_grid_pipeline_links`, called after `sync_fundraising_relational`). **Folded in:** the P2 soft-delete leak in `handle_pipeline_report` + dashboard pipeline aggregates (archived opps no longer counted). Tests: `backend/test_grid_pipeline_link.py` (link/idempotent/round-trip/guards/unlink-intact/re-link/orphan/aggregates), 28/28 suite green, render-smoke green. **Deploy:** server-side → needs an **s9pk build + install** (v87); get authorization first.
+- **Follow-up (v0.1.0:88, frontend-only, build+deploy pending):** retired the Pipeline page's **"+ New Opportunity"** button + its create-by-contact modal — an opportunity is now born **only** from a fundraising-grid investor row ("+ Pipeline"), matching how the team works (they live in the grid). The board is now a view + stage-management surface; button replaced with a muted "Add deals from the Fundraising Grid" hint. Removed the dead handler/state + the page's unused `/api/contacts` fetch.
 - **Deferred (not built):** no write-back of committed dollars into grid fund cells (grid stays canonical for committed $); a graveyarded investor with a live opp still shows its stage (deliberate — a live deal is a live deal).
 
 **Keep the Contacts table — as the read-only per-person directory it already is.** Confirmed 2026-06-16: the grid models **investor entity → many people** correctly today. The grid "contacts" column is a multi-pill editor; each pill syncs to a `fundraising_contacts` row AND its own classic `contacts` row (5-person family office → 1 investor + 5 contacts, linked via `fundraising_contacts.contact_id`, migration 0004). The Contacts page is **read-only for creation** (header: "added from the Fundraising Grid"; no New-Contact button), edit-only via the detail slide-over — the desired flow already holds. Email capture already rolls **multiple people up to one investor** (matcher indexes each pill's email separately, all → same `fundraising_investor_id`; `email_investor_links` records both investor and specific person). No build here — future email-surfacing UI should present comms grouped by investor across all its people.