test: expand service coverage and modernize test infrastructure

- replace legacy mockito-all with mockito-junit-jupiter
- add tests for AppState, MQTT service, process manager, and animation file service
- rewrite service tests for stronger edge-case coverage
- refactor services for testability (MQTT client/process launcher/output path injection)
- fix duplicate payload ID handling in BinaryEventService
- update README and docs testing/source-map sections

docs/KNOWN_ISSUES.md

@@ -28,15 +28,7 @@ Impact:
 
 - log output may indicate startup intent, but process is not actually launched via that path
 
-## 4. Legacy Mockito Dependency
-
-Mockito-based tests fail on Java 17 due to old `mockito-all:2.0.2-beta`.
-
-Impact:
-
-- full CI-style green test run is blocked until dependency modernization
-
-## 5. Encoding Artifacts in Logs/Strings
+## 4. Encoding Artifacts in Logs/Strings
 
 Some source/log text contains mojibake characters in comments/messages.
 

docs/SOURCE_MAP.md

@@ -51,9 +51,16 @@ Package-level map of all Java source files in `src/main/java` and tests in `src/
 
 ## Test Sources
 
+### `vassistent.model`
+
+- `AppStateTest.java`
+
 ### `vassistent.service`
 
+- `AnimationFileServiceTest.java`
 - `BinaryEventServiceTest.java`
 - `DataPersistenceServiceTest.java`
 - `EvaluationServiceTest.java`
+- `MqttClientServiceTest.java`
+- `ProcessManagerServiceTest.java`
 - `StatisticsServiceTest.java`

docs/TESTING.md

@@ -8,32 +8,36 @@ mvn test
 
 ## Current Test Suite
 
-Located in `src/test/java/vassistent/service`:
+Located in:
 
-- `BinaryEventServiceTest`
-- `DataPersistenceServiceTest`
-- `EvaluationServiceTest`
-- `StatisticsServiceTest`
+- `src/test/java/vassistent/model/AppStateTest`
+- `src/test/java/vassistent/service/AnimationFileServiceTest`
+- `src/test/java/vassistent/service/BinaryEventServiceTest`
+- `src/test/java/vassistent/service/DataPersistenceServiceTest`
+- `src/test/java/vassistent/service/EvaluationServiceTest`
+- `src/test/java/vassistent/service/MqttClientServiceTest`
+- `src/test/java/vassistent/service/ProcessManagerServiceTest`
+- `src/test/java/vassistent/service/StatisticsServiceTest`
+
+Coverage focus:
+
+- state change notifications
+- payload validation and processing flow
+- level evaluation thresholds
+- MQTT lifecycle and topic routing
+- process launch/shutdown command sequencing
+- animation file output mapping
+- SQLite persistence behavior
+- rolling averages and ratio calculations
 
 ## Current Status (Java 17)
 
-The suite does not fully pass on Java 17 because of legacy Mockito dependency:
+- full suite passes with `mvn test`
+- test stack:
+  - `org.junit.jupiter:junit-jupiter`
+  - `org.mockito:mockito-junit-jupiter`
 
-- project uses `mockito-all:2.0.2-beta`
-- this version relies on CGLIB behavior that conflicts with modern Java module access
-- result: Mockito-based tests fail at initialization (`InaccessibleObjectException`)
+## Notes
 
-Tests not depending on Mockito are expected to run successfully.
-
-## Recommended Fix
-
-Replace legacy dependency with modern Mockito stack, for example:
-
-- `org.mockito:mockito-core` (or `mockito-junit-jupiter`)
-- ensure JUnit Jupiter engine is configured by Surefire
-
-After dependency update, rerun:
-
-```powershell
-mvn test
-```
+- some tests are integration-style and use temporary SQLite databases
+- test output may include logger lines because services log during execution