remove cost logging from agent runs; extract secrets into own tab

- stop capturing/displaying total_cost_usd from Claude CLI (theoretical cost is misleading for subscription users)
- remove Cost column from action logs table and GitHub Job Summary
- extract SecretsCard into its own sidebar tab with KeyRound icon
- remove children prop from AgentSettingsSection

Made-with: Cursor

utils/log.ts

@@ -339,40 +339,24 @@ export function formatIndentedField(label: string, content: string): string {
 export function formatUsageSummary(entries: AgentUsage[]): string {
   if (entries.length === 0) return "";
 
-  const hasCost = entries.some((e) => e.costUsd !== undefined);
-
-  const header = hasCost
-    ? "| Agent | Input | Output | Cache Read | Cache Write | Cost |"
-    : "| Agent | Input | Output | Cache Read | Cache Write |";
-
+  const header = "| Agent | Input | Output | Cache Read | Cache Write |";
+  const separatorRow = "| --- | ---: | ---: | ---: | ---: |";
   const fmt = (n: number) => n.toLocaleString("en-US");
 
-  const separatorRow = hasCost
-    ? "| --- | ---: | ---: | ---: | ---: | ---: |"
-    : "| --- | ---: | ---: | ---: | ---: |";
+  const rows = entries.map(
+    (e) =>
+      `| ${e.agent} | ${fmt(e.inputTokens)} | ${fmt(e.outputTokens)} | ${fmt(e.cacheReadTokens ?? 0)} | ${fmt(e.cacheWriteTokens ?? 0)} |`
+  );
 
-  const rows = entries.map((e) => {
-    const base = `| ${e.agent} | ${fmt(e.inputTokens)} | ${fmt(e.outputTokens)} | ${fmt(e.cacheReadTokens ?? 0)} | ${fmt(e.cacheWriteTokens ?? 0)} |`;
-    return hasCost
-      ? `${base} ${e.costUsd !== undefined ? `$${e.costUsd.toFixed(4)}` : "-"} |`
-      : base;
-  });
-
-  // totals row (only useful when there are multiple entries)
   const totalsRows: string[] = [];
   if (entries.length > 1) {
     const totalInput = entries.reduce((sum, e) => sum + e.inputTokens, 0);
     const totalOutput = entries.reduce((sum, e) => sum + e.outputTokens, 0);
     const totalCacheRead = entries.reduce((sum, e) => sum + (e.cacheReadTokens ?? 0), 0);
     const totalCacheWrite = entries.reduce((sum, e) => sum + (e.cacheWriteTokens ?? 0), 0);
-    const totalBase = `| **Total** | **${fmt(totalInput)}** | **${fmt(totalOutput)}** | **${fmt(totalCacheRead)}** | **${fmt(totalCacheWrite)}** |`;
-
-    if (hasCost) {
-      const totalCost = entries.reduce((sum, e) => sum + (e.costUsd ?? 0), 0);
-      totalsRows.push(`${totalBase} **$${totalCost.toFixed(4)}** |`);
-    } else {
-      totalsRows.push(totalBase);
-    }
+    totalsRows.push(
+      `| **Total** | **${fmt(totalInput)}** | **${fmt(totalOutput)}** | **${fmt(totalCacheRead)}** | **${fmt(totalCacheWrite)}** |`
+    );
   }
 
   return [