refactor: dedupe speech core vitest shim

src/plugins/capability-runtime-vitest-shims/speech-core.ts

@@ -1,6 +1,3 @@
-import { rmSync } from "node:fs";
-
-export type { SpeechProviderPlugin } from "../../plugins/types.js";
 export type {
   SpeechDirectiveTokenParseContext,
   SpeechDirectiveTokenParseResult,
@@ -8,6 +5,7 @@ export type {
   SpeechModelOverridePolicy,
   SpeechProviderConfig,
   SpeechProviderConfiguredContext,
+  SpeechProviderPlugin,
   SpeechProviderResolveConfigContext,
   SpeechProviderResolveTalkConfigContext,
   SpeechProviderResolveTalkOverridesContext,
@@ -17,64 +15,15 @@ export type {
   SpeechVoiceOption,
   TtsDirectiveOverrides,
   TtsDirectiveParseResult,
-} from "../../tts/provider-types.js";
+} from "../../plugin-sdk/speech-core.js";
 
-const TEMP_FILE_CLEANUP_DELAY_MS = 5 * 60 * 1000;
-
-export function requireInRange(value: number, min: number, max: number, label: string): void {
-  if (!Number.isFinite(value) || value < min || value > max) {
-    throw new Error(`${label} must be between ${min} and ${max}`);
-  }
-}
-
-export function normalizeLanguageCode(code?: string): string | undefined {
-  const trimmed = code?.trim();
-  if (!trimmed) {
-    return undefined;
-  }
-  const normalized = trimmed.toLowerCase();
-  if (!/^[a-z]{2}$/.test(normalized)) {
-    throw new Error("languageCode must be a 2-letter ISO 639-1 code (e.g. en, de, fr)");
-  }
-  return normalized;
-}
-
-export function normalizeApplyTextNormalization(mode?: string): "auto" | "on" | "off" | undefined {
-  const trimmed = mode?.trim();
-  if (!trimmed) {
-    return undefined;
-  }
-  const normalized = trimmed.toLowerCase();
-  if (normalized === "auto" || normalized === "on" || normalized === "off") {
-    return normalized;
-  }
-  throw new Error("applyTextNormalization must be one of: auto, on, off");
-}
-
-export function normalizeSeed(seed?: number): number | undefined {
-  if (seed == null) {
-    return undefined;
-  }
-  const next = Math.floor(seed);
-  if (!Number.isFinite(next) || next < 0 || next > 4_294_967_295) {
-    throw new Error("seed must be between 0 and 4294967295");
-  }
-  return next;
-}
-
-export function scheduleCleanup(
-  tempDir: string,
-  delayMs: number = TEMP_FILE_CLEANUP_DELAY_MS,
-): void {
-  const timer = setTimeout(() => {
-    try {
-      rmSync(tempDir, { recursive: true, force: true });
-    } catch {
-      // ignore cleanup errors
-    }
-  }, delayMs);
-  timer.unref();
-}
+export {
+  normalizeApplyTextNormalization,
+  normalizeLanguageCode,
+  normalizeSeed,
+  requireInRange,
+  scheduleCleanup,
+} from "../../plugin-sdk/speech-core.js";
 
 export async function summarizeText(): Promise<never> {
   throw new Error("summarizeText is unavailable in the Vitest capability contract shim");