fix(cli): remove explicit any type to pass ESLint checks

Replace 'any' type annotation with proper type guard in inventory-store.ts
and add optional chaining in test to satisfy TypeScript strict checks.

All three platforms (Ubuntu, macOS, Windows) CI checks now pass.

cli/src/stores/inventory-store.ts

@@ -74,8 +74,8 @@ export class InventoryStore {
         const lockData = JSON.stringify({ pid: process.pid, timestamp: Date.now() })
         await writeFile(lockPath, lockData)
         return lockHandle
-      } catch (err: any) {
-        if (err.code !== 'EEXIST') throw err
+      } catch (err) {
+        if (err instanceof Error && 'code' in err && err.code !== 'EEXIST') throw err
 
         // Lock exists, check if it's stale (older than 30 seconds)
         // 30s threshold chosen to balance between:

cli/test/unit/stores/inventory-store.test.ts

@@ -62,7 +62,7 @@ describe('InventoryStore', () => {
 
     const inventory = await store.read()
     expect(inventory.items).toHaveLength(1)
-    expect(inventory.items[0].slug).toBe('test-skill')
+    expect(inventory.items[0]?.slug).toBe('test-skill')
   })
 
   test('removeTarget returns false when item not found', async () => {