R-718: the close-sign-up and setup-gate cards say the app restarts once

Where the app has its own switch (after_setup.env), both presses restart
it; the cards now say so (app_info.restarts_once, hu+en). Two parity
cases born with the line.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/templates/app_info.html

@@ -95,7 +95,8 @@
 {{- if .SetupGateClosed}}
 <div class="app-info-card" style="margin-top:1rem" id="setup-gate-card">
     <h3>{{T "app_info.setup_gate_title"}}</h3>
-    <p>{{T "app_info.setup_gate_closed"}}</p>
+    <p>{{T "app_info.setup_gate_closed"}}</p>{{- if .SignupNative}}
+    <p class="form-hint" data-restarts-once="true">{{T "app_info.restarts_once"}}</p>{{- end}}
     {{- if .SetupGateHasProbe}}
     <p class="form-hint">{{T "app_info.setup_gate_probe"}}</p>
     <button type="button" class="btn btn-sm btn-outline" onclick="appPress(this, '/apps/{{.Meta.Slug}}/setup-gate/open')">{{T "app_info.setup_gate_done_btn"}}</button>
@@ -109,7 +110,8 @@
 {{- if .CloseSignupOffered}}
 <div class="app-info-card" style="margin-top:1rem" id="close-signup-card">
     <h3>{{T "app_info.signup_title"}}</h3>
-    <p>{{T "app_info.close_signup_text"}}</p>
+    <p>{{T "app_info.close_signup_text"}}</p>{{- if .SignupNative}}
+    <p class="form-hint" data-restarts-once="true">{{T "app_info.restarts_once"}}</p>{{- end}}
     <button type="button" class="btn btn-sm btn-primary" onclick="appPress(this, '/apps/{{.Meta.Slug}}/close-signup')">{{T "app_info.close_signup_btn"}}</button>
     <span class="form-hint app-press-err" style="display:none;color:var(--red)"></span>
 </div>