catalog: the lifecycle implementation itself (fixes the previous commit)

The previous commit landed only the new test/badge files: a 'git stash' used
to compare REUSE.md ref-check output silently dropped the staged index, so
every modification to an existing file was left behind and that commit does
not build. This adds the metadata field, the predicates, the fail-closed
deploy gate, the catalog filter, the funcmap entries, the template edits and
the docs that those tests exercise.

controller/internal/web/templates/app_info.html

@@ -10,6 +10,7 @@
         {{if .Stack.Deployed}}
             <span class="stack-state-badge state-{{stateColor .Stack.State}}">{{stateLabel .Stack.State}}</span>
             {{if .Stack.Orphaned}}<span class="badge badge-orphaned">Elavult</span>{{end}}
+            {{template "meta_badge" (lifecycleBadge .Meta)}}
             {{if .EffectiveSubdomain}}<a href="https://{{.EffectiveSubdomain}}.{{.Domain}}{{.Meta.OpenPath}}" target="_blank" class="btn btn-sm btn-outline">Megnyitás ↗</a>{{end}}
             <a href="/stacks/{{.Stack.Name}}/logs" class="btn btn-sm btn-outline">Napló</a>
             {{if .Stack.Orphaned}}
@@ -19,7 +20,9 @@
                 <a href="/stacks/{{.Stack.Name}}/deploy" class="btn btn-sm btn-outline">Beállítások</a>
             {{end}}
         {{else}}
-            <a href="/stacks/{{.Stack.Name}}/deploy" class="btn btn-sm btn-primary" onclick="return checkBeforeDeploy(event, '{{.Stack.Name}}')">Telepítés</a>
+            {{/* Server-side the deploy endpoint refuses a non-installable template; hide the button
+                 so the page never offers an action that would be rejected. */}}
+            {{if canInstall .Meta}}<a href="/stacks/{{.Stack.Name}}/deploy" class="btn btn-sm btn-primary" onclick="return checkBeforeDeploy(event, '{{.Stack.Name}}')">Telepítés</a>{{end}}
         {{end}}
     </div>
 </div>
@@ -49,6 +52,12 @@
             {{if .Meta.Resources.PiCompatible}}<span class="meta-badge meta-badge-ok">Pi kompatibilis</span>{{else}}<span class="meta-badge meta-badge-warn">Csak x86</span>{{end}}
             {{if .Meta.Resources.HungarianUI}}<span class="meta-badge meta-badge-ok">Magyar felület</span>{{end}}
         </div>
+        {{if .Meta.IsAbandoned}}
+        <div class="alert alert-warning" style="margin-top:.75rem">
+            Az alkalmazás fejlesztője felhagyott a fejlesztéssel. A telepített verzió továbbra is használható,
+            de frissítések és biztonsági javítások már nem érkeznek hozzá.
+        </div>
+        {{end}}
     </div>
 </div>