fix(audit-wave-9): copy/terminology sweep (copy-auditor)

Address the highest-impact items from the copy-auditor's CRITICAL +
HIGH + MEDIUM bands:

**C2 portal raw-status leak**
- Drop the staff-only `leadCategory` chip from the portal interests
  page entirely. Privacy + optics: clients should never see "hot lead"
  in their own portal. `eoiStatus` was already wrapped in
  `portalSigningLabel`; only the categorical chip remained.

**C3 signing-status label drift**
- Add `src/lib/labels/document-status.ts` as the single source of
  truth for the {draft, sent, partially_signed, completed, expired,
  cancelled} lifecycle: labels (CRM + portal variants), StatusPill
  variant, and the "active / in-flight" set.
- Wire it into interest-eoi-tab, interest-contract-tab,
  interest-reservation-tab — they previously redefined identical
  STATUS_LABELS / ACTIVE_STATUSES blocks per-file.

**H1 + M3 verbiage codemod**
- `Save Changes` → `Save changes` (sentence case, matches the
  surrounding admin/CRM pattern).
- `Saving...` (ASCII three dots) → `Saving…` (Unicode ellipsis).
  Matches the project's UTF-8-elsewhere convention and reads
  correctly via screen-readers.

**M1 envelope jargon → signing request**
- smart-archive-dialog: "Leave envelope pending" → "Leave signing
  request pending"; "Void the signing envelope" → "Cancel the signing
  request"; section header updated to match.
- document-detail: "voids the signing envelope" → "cancels the signing
  request".
- bulk-archive-wizard: "leave invoices/signing envelopes alone" →
  "leave invoices/signing requests alone".
- Documenso admin page intentionally keeps `envelope` (dev/integration
  vocabulary).

**M5 Hot Lead casing**
- Normalize `Hot Lead` / `General Interest` / `Specific Qualified` to
  sentence case in `constants.ts` LABEL_OVERRIDES and all per-file
  lead-category maps so the CRM trend (sentence case) is consistent.

**C1 surface-level rename**
- "Linked prospect (optional)" → "Linked interest (optional)" on the
  berth status-change dialog.
- "Deal Documents" tab → "Interest Documents" (URL/route kept as
  `/deal-documents` to avoid breaking deep links; rename deferred).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/admin/custom-fields/custom-field-form.tsx

@@ -319,7 +319,7 @@ function CustomFieldFormBody({ open, onOpenChange, field, onSuccess }: CustomFie
               Cancel
             </Button>
             <Button type="submit" disabled={loading}>
-              {loading ? 'Saving...' : isEdit ? 'Save Changes' : 'Create Field'}
+              {loading ? 'Saving…' : isEdit ? 'Save changes' : 'Create Field'}
             </Button>
           </DialogFooter>
         </form>

src/components/admin/document-templates/template-form.tsx

@@ -197,7 +197,7 @@ export function TemplateForm({ open, onOpenChange, template, onSuccess }: Templa
               Cancel
             </Button>
             <Button type="submit" disabled={loading || !!jsonError}>
-              {loading ? 'Saving…' : isEdit ? 'Save Changes' : 'Create Template'}
+              {loading ? 'Saving…' : isEdit ? 'Save changes' : 'Create Template'}
             </Button>
           </SheetFooter>
         </form>

src/components/admin/ports/port-form.tsx

@@ -208,7 +208,7 @@ function PortFormBody({ open, onOpenChange, port, onSuccess }: PortFormProps) {
               Cancel
             </Button>
             <Button type="submit" disabled={loading || !name.trim() || !slug.trim()}>
-              {loading ? 'Saving...' : isEdit ? 'Save Changes' : 'Create Port'}
+              {loading ? 'Saving…' : isEdit ? 'Save changes' : 'Create Port'}
             </Button>
           </SheetFooter>
         </form>

src/components/admin/roles/role-form.tsx

@@ -307,7 +307,7 @@ function RoleFormBody({ open, onOpenChange, role, onSuccess }: RoleFormProps) {
               Cancel
             </Button>
             <Button type="submit" disabled={loading || !name.trim()}>
-              {loading ? 'Saving...' : isEdit ? 'Save Changes' : 'Create Role'}
+              {loading ? 'Saving…' : isEdit ? 'Save changes' : 'Create Role'}
             </Button>
           </SheetFooter>
         </form>

src/components/admin/settings/settings-manager.tsx

@@ -503,7 +503,7 @@ export function SettingsManager() {
                       }
                     }}
                   >
-                    {saving === setting.key ? 'Saving...' : 'Save'}
+                    {saving === setting.key ? 'Saving…' : 'Save'}
                   </Button>
                 </div>
               );

src/components/admin/tags/tag-form.tsx

@@ -144,7 +144,7 @@ export function TagForm({ open, onOpenChange, tag, onSuccess }: TagFormProps) {
               Cancel
             </Button>
             <Button type="submit" disabled={loading || !name.trim()}>
-              {loading ? 'Saving...' : isEdit ? 'Save Changes' : 'Create Tag'}
+              {loading ? 'Saving…' : isEdit ? 'Save changes' : 'Create Tag'}
             </Button>
           </SheetFooter>
         </form>

src/components/admin/users/user-form.tsx

@@ -327,7 +327,7 @@ function UserFormBody({ open, onOpenChange, user, onSuccess }: UserFormProps) {
                   Cancel
                 </Button>
                 <Button type="submit" disabled={loading || !displayName.trim() || !roleId}>
-                  {loading ? 'Saving...' : isEdit ? 'Save changes' : 'Create user'}
+                  {loading ? 'Saving…' : isEdit ? 'Save changes' : 'Create user'}
                 </Button>
               </SheetFooter>
             </form>

src/components/admin/webhooks/webhook-form.tsx

@@ -142,7 +142,7 @@ export function WebhookForm({ open, onOpenChange, webhook, onSuccess }: WebhookF
                 type="submit"
                 disabled={loading || !name.trim() || !url.trim() || events.length === 0}
               >
-                {loading ? 'Saving...' : isEdit ? 'Save Changes' : 'Create Webhook'}
+                {loading ? 'Saving…' : isEdit ? 'Save changes' : 'Create Webhook'}
               </Button>
             </SheetFooter>
           </form>