Stage 17: backend defect fixes (nudge code, TG name, robot names/timing, multi-device push, move-duration metric + admin analytics)

- #3 nudge-on-own-turn: distinct result code nudge_own_turn + i18n (was reused 'not_your_turn')
- #2 sanitize connector registration name to the editable format; Player/Игрок-XXXXX fallback
- #5 variant-aware robot name pools (composed full/colloquial first + surname forms; ru gets <=20% latin)
- #4 move-number-aware robot move timing (early 1-5min -> late 10-90min, skew k=4)
- #7 emit move event to the actor too (multi-device sync); opponent_moved stays in-app only
- #1 live game_move_duration{variant,phase} histogram + admin console per-user min/avg/max columns and an inline-SVG move-time-by-move-number chart (offline from the journal)
- ProvisionRobot bypasses editor name validation (system names like 'Peter J.')

backend/internal/adminconsole/templates/pages/users.gohtml

@@ -2,7 +2,7 @@
 <h1>Users</h1>
 {{with .Data}}
 <table class="list">
-<thead><tr><th>Account</th><th>Display name</th><th>Kind</th><th>Lang</th><th>Created</th></tr></thead>
+<thead><tr><th>Account</th><th>Display name</th><th>Kind</th><th>Lang</th><th>Created</th><th title="per-move think time across all games">Move min</th><th>avg</th><th>max</th></tr></thead>
 <tbody>
 {{range .Items}}
 <tr>
@@ -11,9 +11,10 @@
 <td>{{.Kind}}</td>
 <td>{{.Language}}</td>
 <td>{{.CreatedAt}}</td>
+{{if .HasMoveStats}}<td>{{.MoveMin}}</td><td>{{.MoveAvg}}</td><td>{{.MoveMax}}</td>{{else}}<td colspan="3"><span class="note">—</span></td>{{end}}
 </tr>
 {{else}}
-<tr><td colspan="5"><span class="note">no users</span></td></tr>
+<tr><td colspan="8"><span class="note">no users</span></td></tr>
 {{end}}
 </tbody>
 </table>