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>

open-sse/utils/usageTracking.js

@@ -4,6 +4,9 @@
 
 import { FORMATS } from "../translator/formats.js";
 
+// Legacy per-chunk usage console line; off by default (superseded by "📊 done")
+const DEBUG_USAGE = process.env.LOG_USAGE_VERBOSE === "1";
+
 // ANSI color codes
 export const COLORS = {
   reset: "\x1b[0m",
@@ -401,6 +404,10 @@ export function estimateUsage(body, contentLength, targetFormat = FORMATS.OPENAI
 export function logUsage(provider, usage, model = null, connectionId = null, apiKey = null) {
   if (!usage || typeof usage !== "object") return;
 
+  // Console output moved to the unified "📊 done" line (streamingHandler). Kept as
+  // a no-op hook so callers stay unchanged; usage persistence happens via saveUsageStats.
+  if (!DEBUG_USAGE) return;
+
   const p = provider?.toUpperCase() || "UNKNOWN";
 
   // Support both formats: