fix: remove /api prefix from conversation API calls in frontend

dashboard/frontend/src/routes/Conversations.svelte

@@ -18,7 +18,7 @@
 
   onMount(async () => {
     try {
-      dates = await get("/api/conversations/dates");
+      dates = await get("/conversations/dates");
       if (dates.length) selectDate(dates[0]);
       loadStats();
     } catch (e) {
@@ -32,8 +32,8 @@
     loading = true;
     error = "";
     try {
-      summary = await get(`/api/conversations/summary/${d}`);
-      conversations = await get(`/api/conversations/list?date=${d}`);
+      summary = await get(`/conversations/summary/${d}`);
+      conversations = await get(`/conversations/list?date=${d}`);
     } catch (e) {
       summary = null;
       if (e.status !== 404) error = e.body?.detail || "Failed to load summary";
@@ -46,8 +46,8 @@
     view = "detail";
     loading = true;
     try {
-      selectedConversation = await get(`/api/conversations/${sessionId}`);
-      messages = await get(`/api/conversations/${sessionId}/messages`);
+      selectedConversation = await get(`/conversations/${sessionId}`);
+      messages = await get(`/conversations/${sessionId}/messages`);
     } catch (e) {
       error = "Failed to load conversation";
     } finally {
@@ -60,7 +60,7 @@
     view = "search";
     loading = true;
     try {
-      searchResults = await get(`/api/conversations/search?q=${encodeURIComponent(searchQuery)}`);
+      searchResults = await get(`/conversations/search?q=${encodeURIComponent(searchQuery)}`);
     } catch (e) {
       error = "Search failed";
     } finally {
@@ -70,7 +70,7 @@
 
   async function loadStats() {
     try {
-      stats = await get("/api/conversations/stats");
+      stats = await get("/conversations/stats");
     } catch (e) {
       console.error("Failed to load stats", e);
     }
@@ -79,7 +79,7 @@
   async function trigger() {
     triggering = true;
     try {
-      await post("/api/conversations/trigger");
+      await post("/conversations/trigger");
       setTimeout(() => selectDate(selectedDate), 5000);
     } catch (e) {
       error = "Trigger failed";