Cache search results in shared links — no re-searching on open

When sharing a search, the actual results are now saved alongside
the search config. Opening a shared link shows the cached results
instantly instead of re-running the search against all stores.

- Add results_json column to shared_searches (migration 006)
- Frontend sends current results array when creating a share
- Share page loads cached results directly, shows date saved
- "Search Live Prices" button available to re-run with fresh data
- Falls back to live search if no cached results exist

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/client/src/lib/api.ts

@@ -133,6 +133,7 @@ export function saveSharedSearch(data: {
   excludedStores?: string;
   sortBy?: string;
   sortAsc?: boolean;
+  results?: any[];
 }) {
   return api<any>('/api/share', { method: 'POST', body: JSON.stringify(data) });
 }

src/client/src/routes/results/+page.svelte

@@ -135,6 +135,7 @@
         excludedStores: excludedStores.size > 0 ? [...excludedStores].join(',') : undefined,
         sortBy,
         sortAsc,
+        results,
       });
       const shareUrl = `${window.location.origin}/share/${shared.share_id}`;
       await navigator.clipboard.writeText(shareUrl);

src/client/src/routes/share/[id]/+page.svelte

@@ -34,8 +34,20 @@
         excludedStores = new Set(shared.excluded_stores.split(','));
       }
 
-      // Run the search with saved store selection
+      // Use cached results if available, otherwise re-search
+      if (shared.results && shared.results.length > 0) {
+        results = shared.results;
+        searchDone = true;
+        meta = {
+          totalResults: shared.results.length,
+          storeCount: new Set(shared.results.map((r) => r.storeName)).size,
+          duration: 0,
+          errors: [],
+        };
+        loading = false;
+      } else {
         doSearch(shared.store_ids || undefined);
+      }
     } catch {
       loadError = 'Shared search not found or has expired.';
       loading = false;
@@ -156,7 +168,12 @@
       </h1>
       {#if meta}
         <span class="text-2xs text-text-tertiary">
-          ({meta.totalResults} results from {meta.storeCount} stores in {meta.duration}ms)
+          ({meta.totalResults} results from {meta.storeCount} stores{#if meta.duration > 0} in {meta.duration}ms{/if})
+        </span>
+      {/if}
+      {#if sharedConfig?.created_at}
+        <span class="text-2xs text-text-tertiary">
+          &middot; saved {new Date(sharedConfig.created_at + 'Z').toLocaleDateString()}
         </span>
       {/if}
     </div>
@@ -164,7 +181,9 @@
       {#if shareMessage}
         <span class="text-2xs text-emerald-400">{shareMessage}</span>
       {/if}
-      <a href="/results?q={encodeURIComponent(query)}" class="btn-secondary text-xs py-1">Search Again</a>
+      <a href="/results?q={encodeURIComponent(query)}" class="btn-secondary text-xs py-1">
+        Search Live Prices
+      </a>
       <a href="/" class="btn-secondary text-xs py-1">New Search</a>
     </div>
   </div>

src/server/db/migrations/006_add_shared_results.sql

@@ -0,0 +1 @@
+ALTER TABLE shared_searches ADD COLUMN results_json TEXT;

src/server/models/shared-search.ts

@@ -11,6 +11,7 @@ export interface SharedSearch {
   excluded_stores: string | null;
   sort_by: string;
   sort_asc: number;
+  results_json: string | null;
   created_at: string;
 }
 
@@ -25,13 +26,14 @@ export function createSharedSearch(data: {
   excludedStores?: string;
   sortBy?: string;
   sortAsc?: boolean;
+  results?: any[];
 }): SharedSearch {
   const db = getDatabase();
   const shareId = generateShareId();
 
   db.run(`
-    INSERT INTO shared_searches (share_id, query, store_ids, filter_text, excluded_stores, sort_by, sort_asc)
+    INSERT INTO shared_searches (share_id, query, store_ids, filter_text, excluded_stores, sort_by, sort_asc, results_json)
-    VALUES (?, ?, ?, ?, ?, ?, ?)
+    VALUES (?, ?, ?, ?, ?, ?, ?, ?)
   `, [
     shareId,
     data.query,
@@ -40,6 +42,7 @@ export function createSharedSearch(data: {
     data.excludedStores || null,
     data.sortBy || 'price',
     data.sortAsc !== false ? 1 : 0,
+    data.results ? JSON.stringify(data.results) : null,
   ]);
 
   saveDatabase();
@@ -47,5 +50,7 @@ export function createSharedSearch(data: {
 }
 
 export function getSharedSearch(shareId: string): SharedSearch | undefined {
-  return queryOne('SELECT * FROM shared_searches WHERE share_id = ?', [shareId]);
+  const row = queryOne('SELECT * FROM shared_searches WHERE share_id = ?', [shareId]);
+  if (!row) return undefined;
+  return row;
 }

src/server/routes/share.ts

@@ -24,6 +24,7 @@ export const shareRoutes: FastifyPluginAsync = async (app) => {
           excludedStores: { type: 'string' },
           sortBy: { type: 'string' },
           sortAsc: { type: 'boolean' },
+          results: { type: 'array' },
         },
       },
     },
@@ -36,6 +37,13 @@ export const shareRoutes: FastifyPluginAsync = async (app) => {
   app.get<{ Params: { id: string } }>('/share/:id', async (request, reply) => {
     const shared = getSharedSearch(request.params.id);
     if (!shared) return reply.code(404).send({ error: 'Shared search not found' });
-    return shared;
+
+    // Parse cached results JSON
+    let results = null;
+    if (shared.results_json) {
+      try { results = JSON.parse(shared.results_json); } catch { /* ignore */ }
+    }
+
+    return { ...shared, results, results_json: undefined };
   });
 };