fix: always redact prompt cache keys in doctor output

Author: ndycode

lib/ui/beginner.ts

@@ -53,7 +53,6 @@ export interface BeginnerAccountSummary {
 export function formatPromptCacheKey(value: string | null | undefined): string {
 	const normalized = value?.trim();
 	if (!normalized) return "none";
-	if (normalized.length <= 8) return normalized;
 	return `${normalized.slice(0, 8)}...`;
 }
 

test/beginner-ui.test.ts

@@ -237,8 +237,8 @@ describe("formatPromptCacheKey", () => {
 		expect(formatPromptCacheKey("   ")).toBe("none");
 	});
 
-	it("keeps short values as-is", () => {
-		expect(formatPromptCacheKey("ses_1234")).toBe("ses_1234");
+	it("redacts short values too", () => {
+		expect(formatPromptCacheKey("ses_1234")).toBe("ses_1234...");
 	});
 
 	it("redacts longer values to an 8-char prefix", () => {