refactor(log): unify request lifecycle logging with session-colored tags

Collapse scattered per-request console lines (request/routing/auth/pending/
usage/stream-usage/stream) into 3 correlated lines: request, transform,
done. Add stable per-session color tag so concurrent request lines are
easy to follow, surface thinking intent, always-on full error logging
for debug, re-enable warn level, and uppercase keyword labels. Also fix
usage overview cards wrapping (5 cards -> grid-cols-5).

Co-authored-by: Cursor <cursoragent@cursor.com>

src/sse/utils/logger.js

@@ -13,6 +13,49 @@ function formatTime() {
   return new Date().toLocaleTimeString("en-US", { hour12: false });
 }
 
+// Colored-dot tags to correlate request lines by session (same session → same color)
+const REQ_TAGS = ["🟢", "🔵", "🟣", "🟡", "🟠", "🔴", "⚪", "🟤"];
+let tagCursor = 0;
+
+// Allocate next rotating tag (fallback when no session seed available)
+export function nextTag() {
+  const tag = REQ_TAGS[tagCursor % REQ_TAGS.length];
+  tagCursor++;
+  return tag;
+}
+
+// Stable tag derived from a session/connection seed: same seed always maps to the same color
+export function tagForSession(seed) {
+  if (!seed) return nextTag();
+  let h = 0;
+  for (let i = 0; i < seed.length; i++) h = (h * 31 + seed.charCodeAt(i)) | 0;
+  return REQ_TAGS[Math.abs(h) % REQ_TAGS.length];
+}
+
+// Print one correlated line: [time] tag symbol message
+export function line(tag, symbol, message) {
+  if (LEVEL > LOG_LEVELS.INFO) return;
+  console.log(`[${formatTime()}] ${tag} ${symbol} ${message}`);
+}
+
+// Like line() but always printed regardless of LOG_LEVEL (errors must never be hidden)
+export function errorLine(tag, symbol, message) {
+  console.log(`[${formatTime()}] ${tag} ${symbol} ${message}`);
+}
+
+// Format thinking intent for the request line ("high(10k)" / "off" / "auto")
+export function fmtThink(intent) {
+  if (!intent || !intent.mode) return null;
+  if (intent.mode === "none") return "off";
+  if (intent.mode === "auto") return "auto";
+  if (intent.mode === "budget") {
+    const k = intent.budget >= 1000 ? `${Math.round(intent.budget / 1000)}k` : `${intent.budget}`;
+    return k;
+  }
+  if (intent.mode === "level") return intent.level;
+  return null;
+}
+
 function formatData(data) {
   if (!data) return "";
   if (typeof data === "string") return data;
@@ -40,7 +83,7 @@ export function info(tag, message, data) {
 export function warn(tag, message, data) {
   if (LEVEL <= LOG_LEVELS.WARN) {
     const dataStr = data ? ` ${formatData(data)}` : "";
-    // console.warn(`[${formatTime()}] ⚠️  [${tag}] ${message}${dataStr}`);
+    console.warn(`[${formatTime()}] ⚠️  [${tag}] ${message}${dataStr}`);
   }
 }