chore(copy): em-dash sweep across user-facing JSX text + bump lint to error

Replaced 174 em-dashes (—) with " - " (space-hyphen-space) across 49
files in src/components + src/app. The em-dash reads as a tell-tale
"AI-generated" marker per the user's design feedback; hyphens with
spaces preserve the connector semantics without the AI tint.

Touched only lines outside pure-comment context (// /* * */). Code
comments, JSDoc, audit-log strings, structured logging strings, and
templates outside the lint scope retain their em-dashes for now —
they're not user-visible.

Also captured two remaining cases that used the `—` HTML entity
instead of the literal character (system-monitoring-dashboard,
interest-stage-picker) — replaced with a plain hyphen.

Bumped the existing `no-restricted-syntax` rule from `warn` → `error`
in eslint.config.mjs scoped to src/components/**/*.tsx +
src/app/**/*.tsx. New code reintroducing em-dashes in JSX text now
fails the lint gate.

Verified: tsc clean, vitest 1448/1448, eslint 0 em-dash warnings.

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

src/components/admin/audit/audit-log-list.tsx

@@ -354,7 +354,7 @@ export function AuditLogList() {
         row.original.ipAddress ? (
           <code className="text-xs text-muted-foreground">{row.original.ipAddress}</code>
         ) : (
-          <span className="text-xs text-muted-foreground">—</span>
+          <span className="text-xs text-muted-foreground"> - </span>
         ),
       size: 130,
     },
@@ -457,7 +457,7 @@ export function AuditLogList() {
               <SelectItem value="job_failed">Job failed</SelectItem>
               <SelectItem value="cron_run">Cron run</SelectItem>
               {/* L-AU02: actions that fire in the code but were missing from
-                  the dropdown — reps couldn't filter on them. */}
+                  the dropdown  -  reps couldn't filter on them. */}
               <SelectItem value="password_change">Password change</SelectItem>
               <SelectItem value="portal_invite">Portal invite</SelectItem>
               <SelectItem value="portal_activate">Portal activate</SelectItem>
@@ -585,7 +585,7 @@ export function AuditLogList() {
 
       {dateRangeInvalid && (
         <p className="mt-2 text-xs text-destructive">
-          From date must be on or before To date — date filter ignored.
+          From date must be on or before To date - date filter ignored.
         </p>
       )}
 
@@ -642,7 +642,7 @@ export function AuditLogList() {
             <>
               <SheetHeader>
                 <SheetTitle>
-                  {detailEntry.action.replace(/_/g, ' ')} — {detailEntry.entityType}
+                  {detailEntry.action.replace(/_/g, ' ')} - {detailEntry.entityType}
                 </SheetTitle>
                 <SheetDescription>
                   {formatDate(detailEntry.createdAt, 'datetime.medium')}