fix: implement in-memory token caching to avoid redundant prefs decryptions (#320)

* fix: implement in-memory token caching to avoid redundant prefs decryptions

Resolves #277

Previously, the `AuthManager.getToken()` method decrypted the entire
`EncryptedSharedPreferences` file on every call. Because this method is
used in the OkHttp interceptor on every HTTP/WS request, and frequently
during navigation, it introduced 10-30ms of redundant work per call.
This compounded to noticeable UI lag (e.g., during chat session switches).

This commit implements thread-safe in-memory caching for the auth token
inside `AuthManager`.
- Added a `@Volatile` `cachedToken` and `tokenInitialized` flag.
- Modified `getToken()` to return the cached value after initial evaluation,
  using double-checked locking (`synchronized(this)`) to avoid race conditions.
- Updated `setToken()` and `setSelectedProfileId()` to correctly invalidate
  or update the cache.
- Added comprehensive unit tests in `AuthManagerTest.kt` to verify caching
  behavior and proper invalidation upon profile switches.

* fix: implement in-memory token caching to avoid redundant prefs decryptions

Resolves #277

Previously, the `AuthManager.getToken()` method decrypted the entire
`EncryptedSharedPreferences` file on every call. Because this method is
used in the OkHttp interceptor on every HTTP/WS request, and frequently
during navigation, it introduced 10-30ms of redundant work per call.
This compounded to noticeable UI lag (e.g., during chat session switches).

This commit implements thread-safe in-memory caching for the auth token
inside `AuthManager`.
- Added a `@Volatile` `cachedToken` and `tokenInitialized` flag.
- Modified `getToken()` to return the cached value after initial evaluation,
  using double-checked locking (`synchronized(this)`) to avoid race conditions.
- Updated `setToken()` and `setSelectedProfileId()` to correctly invalidate
  or update the cache.
- Added comprehensive unit tests in `AuthManagerTest.kt` to verify caching
  behavior and proper invalidation upon profile switches.

* fix: implement in-memory token caching to avoid redundant prefs decryptions

Resolves #277

Previously, the `AuthManager.getToken()` method decrypted the entire
`EncryptedSharedPreferences` file on every call. Because this method is
used in the OkHttp interceptor on every HTTP/WS request, and frequently
during navigation, it introduced 10-30ms of redundant work per call.
This compounded to noticeable UI lag (e.g., during chat session switches).

This commit implements thread-safe in-memory caching for the auth token
inside `AuthManager`.
- Added a `@Volatile` `cachedToken` and `tokenInitialized` flag.
- Modified `getToken()` to return the cached value after initial evaluation,
  using double-checked locking (`synchronized(this)`) to avoid race conditions.
- Updated `setToken()` and `setSelectedProfileId()` to correctly invalidate
  or update the cache.
- Added comprehensive unit tests in `AuthManagerTest.kt` to verify caching
  behavior and proper invalidation upon profile switches.
- Fixed GitGuardian warning by removing the "my_secret_token" from the test.

* fix: implement in-memory token caching to avoid redundant prefs decryptions

Resolves #277

Previously, the `AuthManager.getToken()` method decrypted the entire
`EncryptedSharedPreferences` file on every call. Because this method is
used in the OkHttp interceptor on every HTTP/WS request, and frequently
during navigation, it introduced 10-30ms of redundant work per call.
This compounded to noticeable UI lag (e.g., during chat session switches).

This commit implements thread-safe in-memory caching for the auth token
inside `AuthManager`.
- Added a `@Volatile` `cachedToken` and `tokenInitialized` flag.
- Modified `getToken()` to return the cached value after initial evaluation,
  using double-checked locking (`synchronized(this)`) to avoid race conditions.
- Updated `setToken()` and `setSelectedProfileId()` to correctly invalidate
  or update the cache.
- Added comprehensive unit tests in `AuthManagerTest.kt` to verify caching
  behavior and proper invalidation upon profile switches.
- Fixed GitGuardian warning by removing the "my_secret_token" from the test.
- Fixed merge conflicts and ensured code still tests well.

* fix: implement in-memory token caching to avoid redundant prefs decryptions

Resolves #277

Previously, the `AuthManager.getToken()` method decrypted the entire
`EncryptedSharedPreferences` file on every call. Because this method is
used in the OkHttp interceptor on every HTTP/WS request, and frequently
during navigation, it introduced 10-30ms of redundant work per call.
This compounded to noticeable UI lag (e.g., during chat session switches).

This commit implements thread-safe in-memory caching for the auth token
inside `AuthManager`.
- Added a `@Volatile` `cachedToken` and `tokenInitialized` flag.
- Modified `getToken()` to return the cached value after initial evaluation,
  using double-checked locking (`synchronized(this)`) to avoid race conditions.
- Updated `setToken()` and `setSelectedProfileId()` to correctly invalidate
  or update the cache.
- Added comprehensive unit tests in `AuthManagerTest.kt` to verify caching
  behavior and proper invalidation upon profile switches.
- Fixed GitGuardian warning by removing the "my_secret_token" from the test.

* fix: implement in-memory token caching to avoid redundant prefs decryptions

Resolves #277

Previously, the `AuthManager.getToken()` method decrypted the entire
`EncryptedSharedPreferences` file on every call. Because this method is
used in the OkHttp interceptor on every HTTP/WS request, and frequently
during navigation, it introduced 10-30ms of redundant work per call.
This compounded to noticeable UI lag (e.g., during chat session switches).

This commit implements thread-safe in-memory caching for the auth token
inside `AuthManager`.
- Added a `@Volatile` `cachedToken` and `tokenInitialized` flag.
- Modified `getToken()` to return the cached value after initial evaluation,
  using double-checked locking (`synchronized(this)`) to avoid race conditions.
- Updated `setToken()` and `setSelectedProfileId()` to correctly invalidate
  or update the cache.
- Added comprehensive unit tests in `AuthManagerTest.kt` to verify caching
  behavior and proper invalidation upon profile switches.
- Fixed GitGuardian warning by removing the "my_secret_token" from the test.

---------

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/test/java/com/m57/hermescontrol/ui/connect/ConnectViewModelTest.kt

@@ -613,14 +613,12 @@ class ConnectViewModelTest {
             val viewModel = ConnectViewModel(mockApp)
             viewModel.onPairingString("hermes://connect?host=192.168.1.1&port=8888&token=abc123")
 
-            // Wait for parsing coroutine to finish
-            advanceUntilIdle()
-
             val state = viewModel.uiState.value
             assertEquals("192.168.1.1", state.host)
             assertEquals("8888", state.port)
             assertEquals("abc123", state.token)
             // Should have triggered connect
+            advanceUntilIdle()
             assertTrue("connection should succeed after pairing", viewModel.uiState.value.connectionSuccess)
         }
 }