[PM-14445] TS strict for Key Management, Keys and Lock component (#13121)

* PM-14445: TS strict for Key Management Biometrics

* formatting

* callbacks not null expectations

* state nullability expectations updates

* unit tests fix

* secure channel naming, explicit null check on messageId

* KM-14445: TS strict for Key Management, Keys and Lock component

* conflicts resolution, new strict check failures

* null simplifications

* migrate legacy encryption when no active user throw error instead of hiding it

* throw instead of return

libs/common/src/key-management/crypto/abstractions/encrypt.service.ts

@@ -33,7 +33,7 @@ export abstract class EncryptService {
     encThing: Encrypted,
     key: SymmetricCryptoKey,
     decryptTrace?: string,
-  ): Promise<Uint8Array>;
+  ): Promise<Uint8Array | null>;
   abstract rsaEncrypt(data: Uint8Array, publicKey: Uint8Array): Promise<EncString>;
   abstract rsaDecrypt(data: EncString, privateKey: Uint8Array): Promise<Uint8Array>;
   abstract resolveLegacyKey(key: SymmetricCryptoKey, encThing: Encrypted): SymmetricCryptoKey;

libs/common/src/key-management/crypto/services/encrypt.service.implementation.ts

@@ -136,7 +136,7 @@ export class EncryptServiceImplementation implements EncryptService {
     encThing: Encrypted,
     key: SymmetricCryptoKey,
     decryptContext: string = "no context",
-  ): Promise<Uint8Array> {
+  ): Promise<Uint8Array | null> {
     if (key == null) {
       throw new Error("No encryption key provided.");
     }