release: 1.9.3: Panel-redesign prep: mockups, routes, design contract (docs only)

Panel-redesign prep, docs only: stage 1-2 mockups on all 33 screens, the accepted header/type-scale/contrast corrections, the account e-mail and inbound-delegation decisions, and the routes/quarantine/preflight roadmap screens. Nothing in `internal/web` changes; the design stays `candidate` (3/21) until the redesign itself ships as `2.0.0`.
Added:
  - Panel redesign, account e-mail and notifications: a user's e-mail is its own
  - Panel redesign, contrast: a sweep of every text node against its real ground
  - Panel redesign, header (owner's choice: variant A, with the perforation on a
  - Panel redesign, type scale: about 40 % of the panel's text measured under
  - Panel redesign, header comparison sheet
  … (8 more in CHANGELOG)

Full detail: CHANGELOG.md (1.9.3).

docs/development.md

@@ -107,7 +107,7 @@ than the default «meaningful step» rule in [§ Commits and release build](#com
 2. Git tag `vX.Y.Z` and publish the GitHub Release only on explicit request (see
    [§ Release image](#release-image)).
 
-**Planned version cuts** (from pin `1.9.2`; adjust if semver changes mid-track):
+**Planned version cuts** (from pin `1.9.3`; adjust if semver changes mid-track):
 
 | Stage | ID | Cut |
 |---|---|---|
@@ -120,7 +120,8 @@ than the default «meaningful step» rule in [§ Commits and release build](#com
 | 7 | application auth IPs | `1.9.0` |
 | 8 | port-25 Postfix startup fix | `1.9.1` (PATCH) |
 | 9 | 2026-08-19 code review pass | `1.9.2` (PATCH) |
-| 10 | inbound-antispam-panel | `1.10.0` (planned) |
+| 10 | panel-redesign prep (docs only, owner-requested cut) | `1.9.3` (PATCH) |
+| 11 | inbound-antispam-panel | `1.10.0` (planned) |
 
 Docs-only prep (checklists in plans, no product code) uses the same per-step
 commit rule but **no** version cut until the next product stage ships.