Add typed account and password settings

- Add admin account list, create, role, delete, and password workflows
- Execute identity-checked mutations through the existing dispatcher
- Bound queued credential lifetime and wipe transient secrets
- Add explicit password generation with saved-value acknowledgement
- Handle self-revocation and uncertain outcomes without automatic
  retries
- Register optional account routes without disrupting terminal
  transports
- Expand host regressions and document contracts and pending target
  checks

Validated host suites and pio run; hardware validation remains pending.

docs/agent/code-map.md

@@ -78,6 +78,10 @@ This is a semantic map, not a complete file inventory. Start here, then read the
 
 - 8D.9: `web_serial_settings.{c,h}` owns strict 256-byte typed mutation admission and one session-bound pending/result slot. Existing `admin_ssh_console` dispatcher consumes only an ID, revalidates currentness/dequeue deadline and calls canonical serial APIs. `web_server.c` adds optional GET/POST `/api/settings/serial-operation` (19 handlers total); `web_cookie_auth_require_json()` retains Origin/CSRF/admin policy, private optional registration supports exact GET/POST. UI adds explicit framing/lifecycle/persistence with automatic completion checks (1 s, at most 10 GETs/15 s overall), refresh on known terminal results and manual uncertainty recovery without socket/lease changes. Settings stay visible/stale while pending; only Reset confirms NVS overwrite; selecting the current view is a no-op. `/api/status` uses a consistent zero-wait serial snapshot (`running:null` when unavailable). Tests: cookie `--serial-settings` (10 groups), `--settings` (6), UI (35 after UX refinement), console boundary and lifecycle (13). Build verified, target/signoff pending; bounds and failure contracts: `docs/phase8d9_implementation.md`. Supersedes 8D.8's no-8D.9 status above.
 
+- 8D.10 first slice: `web_account_settings.{c,h}` owns compact admin account list and one session-bound other-account role/delete operation slot. `user_database_get_accounts()` is a zero-wait key/secret-free projection; `*_current()` role/delete wrappers compare target ID/auth generation under the canonical mutation lock. Existing dispatcher routes IDs; successful calls target-revoke web/SSH. Optional GET `/api/settings/accounts`, GET/POST `/api/settings/account-operation` raise handlers to 22, sockets/tasks/stacks/queue depth unchanged. UI Accounts subview preserves terminal/lease semantics, confirms mutations and auto-checks/refreshes with manual uncertainty recovery. Tests: cookie `--accounts` (5), canonical accounts, dispatcher, lifecycle (14), UI (41 + CSP). Target pending; create/password/generated-secret/self changes remain next slice, 8D.10 incomplete. Record: `docs/phase8d10_implementation.md`.
+
+- **Current 8D.10 slice 2 (supersedes first-slice exclusions above):** `web_account_settings.{c,h}` adds create/password/self and separate bodyless POST `/api/settings/accounts/generate-password`; `user_database_set_password_current()` shares mutation-lock target checks and canonical commit logic, `user_database_generate_password_value()` generates without mutation. 768-byte/four-receive admission, 96-byte secret-free results; one-second periodic timer cancels/wipes queued non-executing credentials after 30 seconds plus scheduling latency, while dispatcher wipes executing locals on return. Generation has no retained retrieval; UI uses 60-second context-bound acknowledgement before separate submission. Self revocation can deny result retrieval; 401/disconnect is uncertain. Browser-shell restrictions unchanged. Missing generated-route registration found in review is fixed: independent optional endpoint, 23 handlers, failure isolation/restart coverage. Implementation complete, host-tested/build-verified; target/signoff pending. Parent PASS canonical accounts/boundary, parser 294, cookie accounts 9/shared and serial-settings 10, transport 25/tickets 12, store/serial and diff check; UI agent PASS 57/CSP, route agent lifecycle 15. Parent build 25.61 s, 95,908 B RAM / 1,694,237 B flash (+80/+9,880 vs slice 1; +200/+25,400 vs final 8D.9 UX). Timer runtime costs/stack margins remain unmeasured; no 8D.11. Exact evidence attribution: `docs/phase8d10_implementation.md`.
+
 ### Browser admin backend (8D.5)
 
 - **8D.7 current status (2026-09-07): implemented scope validated; M2 explicitly signed off by the user ("Jupp, sign M2 off").** Supersedes M2-open/target-pending/continuation statements in the historical slices below; accepted M2 does not require revalidation. User verified certificate rotation and web start/stop via UART0/SSH admin/web admin, restarting after browser stop via another route; full mix without broker drops up to 230400 baud after external adapter correction is user-reported. Intermittent supported two serial + one admin admission failures, recently not recurring, are accepted nonblocking, not fixed. Browser self/generated/key/legacy-credential and other owner command restrictions remain deferred; bootstrap/recovery remain permanently UART0-only. Numeric memory reserves/stack margins remain unapproved; no full parity or individual unreported checklist passes. Next: separately requested 8D.8 read-only settings entry and Serial page; sign-off alone authorizes no implementation. Evidence: `docs/phase8d7_implementation.md`.