Test phase alignment after device silence and keep diagnostics current

tools/chatgui/tests/test_call_delay.cpp

@@ -127,9 +127,25 @@ static void tail_and_reset() {
     DEBUG_INFO(DEBUG_CATEGORY_CALL, "PASS delay final tail preserved without flush, reset clears phase/history");
 }
 
+static void phase_after_silence() {
+    for (unsigned block : {240, 480, 777, 960}) for (unsigned silence : {1, 239, 480, 777, 959}) {
+        Trial t;
+        t.timeline.silence(silence); t.delay.silence(silence); t.device += silence;
+        t.available = 5 * 960; // Прямой режим без SoundTouch; стартовая фаза произвольна.
+        uint64_t next = 960;
+        for (uint64_t time = 0; time < 20 * 48000; time += block) {
+            while (next <= time) { t.available += 960; next += 960; }
+            t.pull(block);
+        }
+        auto s = t.delay.stats();
+        CHECK(!s.entered && !s.exited && s.cuts > 0 && !s.phase && s.tempo == 1);
+    }
+    DEBUG_INFO(DEBUG_CATEGORY_CALL, "PASS delay phase: 20 arbitrary initial silence/block combinations converge using cuts only");
+}
+
 int main() {
     debug_config_init(); debug_set_level(DEBUG_LEVEL_INFO);
     for (unsigned block : {240, 480, 777, 960}) for (unsigned phase : {0, 239, 479, 719, 959}) steady(block, phase);
-    switching(); tail_and_reset();
+    switching(); tail_and_reset(); phase_after_silence();
     return 0;
 }