fix(build): resolve three failing tests across integration and tui modules

SessionOrchestratorIntegrationTest: wire approvalRepository into
OrchestratorRepositories constructor which gained the field in the kernel
refactor. TambouiKeyMapperTest: correct ctrl-h to alt-h — the mapper has
always placed ToggleApprovalOverlay under the Alt branch, not Ctrl.
SessionOrchestrator.emit: replace substring(0,7) with take(7) to avoid
StringIndexOutOfBoundsException when session IDs are shorter than 7 chars.

apps/tui/src/test/kotlin/com/correx/apps/tui/input/TambouiKeyMapperTest.kt

@@ -60,8 +60,8 @@ class TambouiKeyMapperTest {
     }
 
     @Test
-    fun `ctrl-h maps to ToggleApprovalOverlay`() {
-        assertEquals(KeyEvent.ToggleApprovalOverlay, mapKey(TambouiKeyEvent(KeyCode.CHAR, KeyModifiers.CTRL, 'h'.code)))
+    fun `alt-h maps to ToggleApprovalOverlay`() {
+        assertEquals(KeyEvent.ToggleApprovalOverlay, mapKey(TambouiKeyEvent(KeyCode.CHAR, KeyModifiers.ALT, 'h'.code)))
     }
 
     @Test