refactor: encapsulate state management for spec and suggestions generation

- Made the generation status variables private and introduced getter functions for both spec and suggestions generation states.
- Updated relevant route handlers to utilize the new getter functions, improving encapsulation and reducing direct access to shared state.
- Enhanced code maintainability by centralizing state management logic.

apps/server/src/routes/app-spec/common.ts

@@ -3,13 +3,22 @@
  */
 
 import { createLogger } from "../../lib/logger.js";
-import { getErrorMessage as getErrorMessageShared } from "../common.js";
 
 const logger = createLogger("SpecRegeneration");
 
-// Shared state for tracking generation status
-export let isRunning = false;
-export let currentAbortController: AbortController | null = null;
+// Shared state for tracking generation status - private
+let isRunning = false;
+let currentAbortController: AbortController | null = null;
+
+/**
+ * Get the current running state
+ */
+export function getSpecRegenerationStatus(): {
+  isRunning: boolean;
+  currentAbortController: AbortController | null;
+} {
+  return { isRunning, currentAbortController };
+}
 
 /**
  * Set the running state and abort controller