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/berths/berth-detail-header.tsx

@@ -222,16 +222,16 @@ function StatusChangeDialog({
           </div>
           {showInterestPicker && (
             <div className="space-y-2">
-              <Label>Linked prospect (optional)</Label>
+              <Label>Linked interest (optional)</Label>
               <InterestLinkPicker
                 value={interestId ?? null}
                 options={interestOptions}
                 onChange={(id) => setValue('interestId', id ?? undefined)}
               />
               <p className="text-xs text-muted-foreground">
-                Link this status change to the prospect (interest) it relates to. The change will
-                appear on that interest&apos;s timeline, and the berth gets attached to the prospect
-                automatically if it wasn&apos;t already.
+                Link this status change to the interest it relates to. The change will appear on
+                that interest&apos;s timeline, and the berth gets attached to it automatically if it
+                wasn&apos;t already.
               </p>
             </div>
           )}
@@ -240,7 +240,7 @@ function StatusChangeDialog({
               Cancel
             </Button>
             <Button type="submit" disabled={isSubmitting}>
-              {isSubmitting ? 'Saving...' : 'Update Status'}
+              {isSubmitting ? 'Saving…' : 'Update Status'}
             </Button>
           </DialogFooter>
         </form>

src/components/berths/berth-form.tsx

@@ -474,7 +474,7 @@ export function BerthForm({ berth, open, onOpenChange }: BerthFormProps) {
               Cancel
             </Button>
             <Button type="submit" disabled={isSubmitting}>
-              {isSubmitting ? 'Saving...' : 'Save Changes'}
+              {isSubmitting ? 'Saving…' : 'Save changes'}
             </Button>
           </SheetFooter>
         </form>

src/components/berths/berth-interests-tab.tsx

@@ -41,9 +41,9 @@ const CATEGORY_RANK: Record<string, number> = {
 };
 
 const CATEGORY_LABELS: Record<string, string> = {
-  hot_lead: 'Hot Lead',
-  specific_qualified: 'Specific Qualified',
-  general_interest: 'General Interest',
+  hot_lead: 'Hot lead',
+  specific_qualified: 'Specific qualified',
+  general_interest: 'General interest',
 };
 
 interface ListResponse {

src/components/berths/berth-tabs.tsx

@@ -461,7 +461,7 @@ export function buildBerthTabs(berth: BerthData): DetailTab[] {
     },
     {
       id: 'deal-documents',
-      label: 'Deal Documents',
+      label: 'Interest Documents',
       content: <BerthDealDocumentsTab berthId={berth.id} />,
     },
     // Waiting List + Maintenance Log tabs were stubs ("coming soon")