ux: improve proposals states

frontend/src/pages/proposals.astro

@@ -44,7 +44,7 @@ import { API_BASE as apiBase } from '../lib/api';
         </div>
       </div>
 
-      <div id="proposals-list" class="list">
+      <div id="proposals-list" class="list" aria-live="polite">
         <div class="state-card ui-card"><p class="loading">Loading proposals...</p></div>
       </div>
     </div>
@@ -78,6 +78,62 @@ import { API_BASE as apiBase } from '../lib/api';
     container.innerHTML = html;
   }
 
+  function renderErrorState(message) {
+    const container = document.getElementById('proposals-list');
+    if (!container) return;
+
+    container.innerHTML = `
+      <div class="state-card ui-card">
+        <p class="error">${message}</p>
+        <p class="hint">Check your connection and try again.</p>
+        <div class="state-actions">
+          <button type="button" class="ui-btn ui-btn-primary" id="retry-load">Retry</button>
+          <a class="ui-btn ui-btn-secondary" href="/communities">Browse communities</a>
+        </div>
+      </div>
+    `;
+
+    document.getElementById('retry-load')?.addEventListener('click', loadProposals);
+  }
+
+  function renderEmptyState(isFiltered) {
+    const container = document.getElementById('proposals-list');
+    if (!container) return;
+
+    container.innerHTML = `
+      <div class="state-card ui-card">
+        <p class="empty">${isFiltered ? 'No proposals match your filters.' : 'No proposals found.'}</p>
+        <p class="hint">Try adjusting search, status, or sort.</p>
+        <div class="state-actions">
+          <button type="button" class="ui-btn ui-btn-secondary" id="reset-filters">Reset filters</button>
+          <a class="ui-btn ui-btn-primary" href="/communities">Go to communities</a>
+        </div>
+      </div>
+    `;
+
+    document.getElementById('reset-filters')?.addEventListener('click', () => {
+      const searchInput = document.getElementById('search-input');
+      const statusFilter = document.getElementById('status-filter');
+      const sortFilter = document.getElementById('sort-filter');
+      if (searchInput) searchInput.value = '';
+      if (statusFilter) statusFilter.value = '';
+      if (sortFilter) sortFilter.value = 'newest';
+      filterProposals();
+    });
+  }
+
+  function hasActiveFilters() {
+    const searchInput = document.getElementById('search-input');
+    const statusFilter = document.getElementById('status-filter');
+    const sortFilter = document.getElementById('sort-filter');
+
+    const query = searchInput?.value.toLowerCase().trim() || '';
+    const status = statusFilter?.value || '';
+    const sort = sortFilter?.value || 'newest';
+
+    return Boolean(query || status || sort !== 'newest');
+  }
+
   async function loadProposals() {
     const container = document.getElementById('proposals-list');
     if (!container) return;
@@ -88,7 +144,7 @@ import { API_BASE as apiBase } from '../lib/api';
       allProposals = await res.json();
       renderProposals(allProposals);
     } catch (error) {
-      container.innerHTML = '<div class="error"><p>Failed to load proposals.</p></div>';
+      renderErrorState('Failed to load proposals.');
     }
   }
 
@@ -97,7 +153,7 @@ import { API_BASE as apiBase } from '../lib/api';
     if (!container) return;
 
     if (proposals.length === 0) {
-      container.innerHTML = '<div class="state-card ui-card"><p class="empty">No proposals found.</p></div>';
+      renderEmptyState(hasActiveFilters());
       return;
     }
 
@@ -171,6 +227,14 @@ import { API_BASE as apiBase } from '../lib/api';
     gap: 1rem;
   }
 
+  .state-actions {
+    margin-top: 1.25rem;
+    display: flex;
+    gap: 0.75rem;
+    justify-content: center;
+    flex-wrap: wrap;
+  }
+
   .proposal-card {
     display: block;
     padding: 1.1rem;

frontend/src/pages/proposals/[id].astro

@@ -28,6 +28,24 @@ const proposalId = id ?? '';
   let quadraticAllocations = {};
   let starRatings = {};
 
+  function renderProposalErrorState(message) {
+    const container = document.getElementById('proposal-content');
+    if (!container) return;
+
+    container.innerHTML = `
+      <div class="state-card ui-card">
+        <p class="error">${escapeHtml(message)}</p>
+        <p class="hint">It may have been deleted, or you may not have access.</p>
+        <div class="state-actions">
+          <button type="button" class="ui-btn ui-btn-primary" id="retry-proposal">Retry</button>
+          <a class="ui-btn ui-btn-secondary" href="/proposals">Back to proposals</a>
+        </div>
+      </div>
+    `;
+
+    document.getElementById('retry-proposal')?.addEventListener('click', loadProposal);
+  }
+
   function escapeHtml(value) {
     return String(value || '').replace(/[&<>"']/g, function(ch) {
       switch (ch) {
@@ -407,7 +425,7 @@ const proposalId = id ?? '';
       }
 
     } catch (error) {
-      container.innerHTML = '<div class="error">Proposal not found</div>';
+      renderProposalErrorState('Proposal not found.');
     }
   }
 
@@ -600,7 +618,12 @@ const proposalId = id ?? '';
       const comments = await res.json();
 
       if (comments.length === 0) {
-        container.innerHTML = '<p class="empty-comments">No comments yet. Be the first to share your thoughts!</p>';
+        container.innerHTML = `
+          <div class="state-card ui-card ui-card-soft">
+            <p class="empty">No comments yet.</p>
+            <p class="hint">Be the first to share your thoughts.</p>
+          </div>
+        `;
         return;
       }
 
@@ -619,7 +642,17 @@ const proposalId = id ?? '';
         `;
       }).join('');
     } catch (e) {
-      container.innerHTML = '<p class="error-small">Failed to load comments</p>';
+      container.innerHTML = `
+        <div class="state-card ui-card ui-card-soft">
+          <p class="error">Failed to load comments.</p>
+          <p class="hint">Try again in a moment.</p>
+          <div class="state-actions">
+            <button type="button" class="ui-btn ui-btn-secondary" id="retry-comments">Retry</button>
+          </div>
+        </div>
+      `;
+
+      document.getElementById('retry-comments')?.addEventListener('click', loadComments);
     }
   }
 
@@ -659,6 +692,14 @@ const proposalId = id ?? '';
     max-width: 880px;
   }
 
+  .state-actions {
+    margin-top: 1.25rem;
+    display: flex;
+    gap: 0.75rem;
+    justify-content: center;
+    flex-wrap: wrap;
+  }
+
   .results-chart-host {
     display: none;
   }