chain blocks: single-line layout, user message display, raw json fix, range label with time

Program.cs

@@ -64,21 +64,65 @@ app.MapGet("/api/cost-chains", (Func<SqliteConnection> factory, string from, str
 {
     using var db = factory();
     var rows = db.Query(@"
-        SELECT chainId,
-               SUM(CAST(json_extract(data, '$.message.usage.cost.total') AS REAL)) AS totalCost,
-               COUNT(*) AS count,
-               MIN(timestamp) AS first,
-               MAX(timestamp) AS last
-        FROM entries
-        WHERE json_extract(data, '$.message.usage.cost.total') IS NOT NULL
-          AND timestamp >= @from AND timestamp < @to
-          AND chainId IS NOT NULL
-        GROUP BY chainId
-        ORDER BY totalCost DESC
-        LIMIT @limit OFFSET @offset",
+        SELECT c.chainId,
+               c.totalCost,
+               c.count,
+               c.first,
+               c.last,
+               e.data AS chainData
+        FROM (
+            SELECT chainId,
+                   SUM(CAST(json_extract(data, '$.message.usage.cost.total') AS REAL)) AS totalCost,
+                   COUNT(*) AS count,
+                   MIN(timestamp) AS first,
+                   MAX(timestamp) AS last
+            FROM entries
+            WHERE json_extract(data, '$.message.usage.cost.total') IS NOT NULL
+              AND timestamp >= @from AND timestamp < @to
+              AND chainId IS NOT NULL
+            GROUP BY chainId
+            ORDER BY totalCost DESC
+            LIMIT @limit OFFSET @offset
+        ) c
+        LEFT JOIN entries e ON e.id = c.chainId",
         new { from, to, limit, offset });
 
-    return Results.Ok(rows);
+    var result = rows.Select((dynamic r) =>
+    {
+        string? userMsg = null;
+        try
+        {
+            string raw = r.chainData;
+            var doc = System.Text.Json.JsonDocument.Parse(raw);
+            var msg = doc.RootElement.GetProperty("message");
+            var content = msg.GetProperty("content");
+            string fullText;
+            if (content.ValueKind == System.Text.Json.JsonValueKind.String)
+                fullText = content.GetString()!;
+            else
+            {
+                fullText = string.Join("\n", content.EnumerateArray()
+                    .Where(c => c.TryGetProperty("type", out var t) && t.GetString() == "text")
+                    .Select(c => c.GetProperty("text").GetString()));
+            }
+
+            userMsg = StripSystemPrefixes(fullText);
+            if (userMsg?.Length > 200) userMsg = userMsg[..200] + "...";
+        }
+        catch { }
+
+        return new
+        {
+            chainId = (string)r.chainId,
+            totalCost = (double)r.totalCost,
+            count = (long)r.count,
+            first = (string)r.first,
+            last = (string)r.last,
+            userMessage = userMsg ?? ""
+        };
+    });
+
+    return Results.Ok(result);
 });
 
 // GET /api/cost-summary?from=&to=
@@ -233,3 +277,40 @@ app.MapPost("/api/sync", async () =>
 });
 
 app.Run();
+
+static string StripSystemPrefixes(string text)
+{
+    var lines = text.Split('\n').ToList();
+    var inCodeBlock = false;
+
+    // Strip from top
+    while (lines.Count > 0)
+    {
+        var t = lines[0].Trim();
+        if (string.IsNullOrEmpty(t)) { lines.RemoveAt(0); continue; }
+        // [Direct ...], [Current ...], [System ...], [message_id ...], [message-id ...], [Chat messages ...], [Queued messages ...]
+        if (t.StartsWith('[') && (t.StartsWith("[Direct ") || t.StartsWith("[Current ") ||
+            t.StartsWith("[System ") || t.StartsWith("[message_id:") || t.StartsWith("[message-id ") ||
+            t.StartsWith("[Chat messages ") || t.StartsWith("[Queued messages ")))
+            { lines.RemoveAt(0); continue; }
+        // [Telegram ... id:xxx ...] msg - strip only the bracket prefix, keep the message after ]
+        if (t.StartsWith("[Telegram ") && t.Contains(']'))
+        {
+            var afterBracket = t[(t.IndexOf(']') + 1)..].Trim();
+            if (!string.IsNullOrEmpty(afterBracket)) { lines[0] = afterBracket; break; }
+            lines.RemoveAt(0); continue;
+        }
+        // "Conversation info", "Queued #N", "---", "Assistant:"
+        if (t.StartsWith("Conversation info") || t.StartsWith("Queued #") ||
+            t.StartsWith("Assistant:") || t == "---") { lines.RemoveAt(0); continue; }
+        // Code block boundaries and JSON content inside
+        if (t == "```json" || t == "```") { inCodeBlock = !inCodeBlock; lines.RemoveAt(0); continue; }
+        if (inCodeBlock) { lines.RemoveAt(0); continue; }
+        // "User: " prefix
+        if (t.StartsWith("User: ")) { lines[0] = t["User: ".Length..]; break; }
+        break;
+    }
+
+    var result = string.Join("\n", lines).Trim();
+    return string.IsNullOrEmpty(result) ? text.Split('\n').LastOrDefault(l => !string.IsNullOrWhiteSpace(l))?.Trim() ?? "" : result;
+}