ux: improve community plugins states

frontend/src/pages/communities/[slug]/plugins.astro

@@ -28,8 +28,68 @@ const { slug } = Astro.params;
 <script define:vars={{ slug, apiBase }}>
   const token = localStorage.getItem('token');
 
-  if (!token) {
+  function renderLoginRequiredState() {
-    window.location.href = '/login';
+    const container = document.getElementById('plugins-content');
+    if (!container) return;
+
+    container.innerHTML = `
+      <div class="state-card ui-card">
+        <p class="empty">Login required.</p>
+        <p class="hint">Sign in to manage community plugins.</p>
+        <div class="state-actions">
+          <a class="ui-btn ui-btn-primary" href="/login">Login</a>
+          <a class="ui-btn ui-btn-secondary" href="/communities/${encodeURIComponent(String(slug || ''))}">Back to community</a>
+        </div>
+      </div>
+    `;
+  }
+
+  function renderNotFoundState() {
+    const container = document.getElementById('plugins-content');
+    if (!container) return;
+
+    container.innerHTML = `
+      <div class="state-card ui-card">
+        <p class="error">Community not found.</p>
+        <p class="hint">It may have been deleted, or the link is incorrect.</p>
+        <div class="state-actions">
+          <a class="ui-btn ui-btn-primary" href="/communities">Back to communities</a>
+        </div>
+      </div>
+    `;
+  }
+
+  function renderForbiddenState(communityName) {
+    const container = document.getElementById('plugins-content');
+    if (!container) return;
+
+    container.innerHTML = `
+      <div class="state-card ui-card">
+        <p class="error">Not allowed.</p>
+        <p class="hint">You must be an admin or moderator to manage plugins for ${escapeHtml(communityName)}.</p>
+        <div class="state-actions">
+          <a class="ui-btn ui-btn-primary" href="/communities/${encodeURIComponent(String(slug || ''))}">Back to community</a>
+        </div>
+      </div>
+    `;
+  }
+
+  function renderPluginsErrorState(message) {
+    const container = document.getElementById('plugins-content');
+    if (!container) return;
+
+    container.innerHTML = `
+      <div class="state-card ui-card">
+        <p class="error">${escapeHtml(message || 'Failed to load plugins.')}</p>
+        <p class="hint">Check your connection and try again.</p>
+        <div class="state-actions">
+          <button type="button" class="ui-btn ui-btn-primary" id="retry-plugins">Retry</button>
+          <a class="ui-btn ui-btn-secondary" href="/communities/${encodeURIComponent(String(slug || ''))}">Back to community</a>
+        </div>
+      </div>
+    `;
+
+    document.getElementById('retry-plugins')?.addEventListener('click', load);
   }
 
   function escapeHtml(str) {
@@ -154,12 +214,23 @@ const { slug } = Astro.params;
     const allowed = membership?.role === 'admin' || membership?.role === 'moderator';
 
     if (!allowed) {
+      renderForbiddenState(community?.name || 'this community');
+      return;
+    }
+
+    if (!plugins || plugins.length === 0) {
       container.innerHTML = `
-        <div class="error">
+        <div class="state-card ui-card">
-          <h2>Forbidden</h2>
+          <p class="empty">No plugins available.</p>
-          <p>You must be an admin or moderator to manage plugins for ${escapeHtml(community.name)}.</p>
+          <p class="hint">If this seems wrong, try reloading the page.</p>
+          <div class="state-actions">
+            <button type="button" class="ui-btn ui-btn-primary" id="retry-plugins-empty">Retry</button>
+            <a class="ui-btn ui-btn-secondary" href="/communities/${encodeURIComponent(String(slug || ''))}">Back to community</a>
+          </div>
         </div>
       `;
+
+      document.getElementById('retry-plugins-empty')?.addEventListener('click', load);
       return;
     }
 
@@ -353,9 +424,14 @@ const { slug } = Astro.params;
     if (!container) return;
 
     try {
+      if (!token) {
+        renderLoginRequiredState();
+        return;
+      }
+
       const community = await fetchCommunityBySlug();
       if (!community) {
-        container.innerHTML = '<div class="error">Community not found</div>';
+        renderNotFoundState();
         return;
       }
 
@@ -364,7 +440,14 @@ const { slug } = Astro.params;
 
       renderPlugins(community, membership, plugins);
     } catch (err) {
-      container.innerHTML = `<div class="error">${escapeHtml(err?.message || 'Failed to load')}</div>`;
+      const msg = err?.message || 'Failed to load plugins.';
+
+      if (String(msg || '').toLowerCase().includes('unauthorized') || String(msg || '').includes('401')) {
+        renderLoginRequiredState();
+        return;
+      }
+
+      renderPluginsErrorState(msg);
     }
   }
 
@@ -478,13 +561,21 @@ const { slug } = Astro.params;
     color: var(--color-text-muted);
   }
 
-  .error {
+  .plugins-error {
     background: var(--color-error-muted);
     border: 1px solid var(--color-error);
     padding: 1rem;
     border-radius: 12px;
   }
 
+  .state-actions {
+    margin-top: 1.25rem;
+    display: flex;
+    gap: 0.75rem;
+    justify-content: center;
+    flex-wrap: wrap;
+  }
+
   .settings-body-wrap {
     padding-top: 0.5rem;
   }