dashboard: strip <system-reminder> blocks from the user-message preview

Claude Code wraps every user turn with injected <system-reminder>…</system-reminder>
context (email, date, tool notes), which the LAST USER MESSAGE column was showing
instead of what was actually typed. Add humanText(): strip those blocks for the
preview so the column reads e.g. "hello claude", falling back to the raw text
for turns that are only injected content. The detail overlay still keeps the full
message. Applies to both the live path and the mock echo.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: garthvh

server.mjs

@@ -277,7 +277,7 @@ function track(body, inputTokens) {
     id: genId("act"), ts: Date.now(), model: body.model, ollamaModel: null,
     stream: !!body.stream, status: "active", inputTokens, outputTokens: 0,
     durationMs: null, stopReason: null, error: null,
-    preview: blockText(lastUser?.content ?? "").replace(/\s+/g, " ").slice(0, 200),
+    preview: humanText(lastUser?.content).slice(0, 200),
     userMessage: blockText(lastUser?.content ?? "").slice(0, BODY_CAP),
     responseText: "",
     _start: Date.now(), _lastPush: 0, _cacheFraction: fraction, _cacheHit: hit,
@@ -316,6 +316,19 @@ function blockText(content) {
   return JSON.stringify(content);
 }
 
+// The human's actual text for the dashboard preview. Claude Code wraps each user
+// turn with injected <system-reminder>…</system-reminder> context blocks; strip
+// them so the column shows what was typed, not the boilerplate. Falls back to the
+// raw text for turns that are only injected content (e.g. tool-result turns).
+function humanText(content) {
+  const raw = blockText(content ?? "");
+  const stripped = raw
+    .replace(/<system-reminder>[\s\S]*?<\/system-reminder>/gi, " ")
+    .replace(/\s+/g, " ")
+    .trim();
+  return stripped || raw.replace(/\s+/g, " ").trim();
+}
+
 function anthropicToOllamaMessages(body) {
   const out = [];
   const sys = systemToString(body.system);
@@ -619,7 +632,7 @@ const MOCK_WORDS = ("the quick brown fox jumps over the lazy dog while testing "
 async function handleMock(res, body, claudeModel, msgId, inputTokens, rec) {
   rec.ollamaModel = "mock";
   const lastUser = [...(body.messages || [])].reverse().find((m) => m.role === "user");
-  const preview = blockText(lastUser?.content ?? "").slice(0, 80);
+  const preview = humanText(lastUser?.content).slice(0, 80);
   const intro = `[mock:${claudeModel}] Echoing your request ("${preview}"). `;
   const words = [intro, ...Array.from({ length: MOCK_TOKENS }, (_, i) => MOCK_WORDS[i % MOCK_WORDS.length] + " ")];
   const sleep = (ms) => new Promise((r) => setTimeout(r, ms));