Cover digital assets and vehicles with proper fast-path instruments

Digital assets: nonprobate.js's suggestion previously claimed channel
'bank-mandate' with label 'Multi-sig / pre-authorized release' — a
mismatch, since bank-mandate's fields (institution/nominee/reference)
don't fit crypto custody at all. New "digital-custody" channel with
custody-type-specific fields: exchange beneficiary feature, self-custody
multi-sig (warns that it only works if a living co-signer is already
configured), or key-escrow with executor (warns explicitly: never store
the actual seed phrase or private key in this app or any single record —
only a reference to WHERE access is arranged).

Vehicles/jewelry/valuables: were lumped into the same "trust" suggestion
as land, which is overkill for movable property that hands over cleanly
by a simple Hibah. Suggestion now points straight to Hibah for these;
land keeps the trust suggestion since it has no such easy path.

CoverageDashboard's suggestion-inline text simplified from an ad-hoc
ternary chain into a clean NEXT_STEP_TAB map, now correctly covering
hibah/trust/digital-custody/business-continuity.

e2e-digital-vehicle.cjs: new suite verifying digital asset exposed ->
custody-type warnings -> export -> covered, and vehicle exposed -> Hibah
suggestion (not trust) -> covered via Hibah link -> 100% combined
coverage. 10/10 passing. Re-verified all four prior suites (32/32,
16/16, 12/12, 10/10) — 80/80 total, no regressions.

src/lib/DeathTrigger.svelte

@@ -79,6 +79,8 @@
         ? 'ACTION: Notify the bank with the death certificate and the death-mandate /\njoint-account documentation on file. Funds release per the mandate terms — this\nis a bank process, not a court process.'
         : row.channel === 'business-continuity'
         ? 'ACTION: Execute the pre-agreed buy-sell provision or partnership continuation\nclause on file. If Takaful-funded, file the Takaful death claim to release the\nbuyout funds. This is a private agreement between co-owners/shareholders, not a\nprobate filing.'
+        : row.channel === 'digital-custody'
+        ? 'ACTION: File the death claim with the custodial platform\'s own beneficiary\nfeature, or have the named multi-sig co-signer/key-escrow holder execute access\nper the plan on file. This is a platform or private-key process, not a probate\nfiling — and never requires disclosing a seed phrase to this app.'
         : 'ACTION: Contact the trustee/nominee holder to execute the pre-arranged transfer\nunder the trust deed. This is an internal trustee record update, not a probate\nfiling.',
       '',
       'This packet was generated by Nur Falah on a local device. It is a drafting aid;',