Enhance Schedule component by resetting time fields on cancel and draft mode toggle; improve session scheduling logic to prevent conflicts by adjusting start times if necessary.

client/src/components/Schedule.tsx

@@ -96,6 +96,9 @@ function Schedule({ selectedDay, slots, events }: Props) {
 
   function handleClickCancel() {
     setDraftMode(false);
+    setStartTime("");
+    setEndTime("");
+    setDuration(undefined);
   }
 
   async function addSchesuledSession() {
@@ -129,6 +132,9 @@ function Schedule({ selectedDay, slots, events }: Props) {
   function handleClickScheduleDemo() {
     setDateForInstantStart(undefined);
     setStartAt(new Date());
+    setStartTime("");
+    setEndTime("");
+    setDuration(undefined);
     setDraftMode(true);
   }
 
@@ -184,9 +190,12 @@ function Schedule({ selectedDay, slots, events }: Props) {
 
   useEffect(() => {
     function handleEscKey(e: KeyboardEvent) {
-      if (!draftMode && e.key !== "Escape") return;
+      if (!draftMode || e.key !== "Escape") return;
 
       setDraftMode(false);
+      setStartTime("");
+      setEndTime("");
+      setDuration(undefined);
     }
 
     document.addEventListener("keyup", handleEscKey, false);
@@ -194,7 +203,7 @@ function Schedule({ selectedDay, slots, events }: Props) {
     return () => {
       document.removeEventListener("keyup", handleEscKey, false);
     };
-  }, []);
+  }, [draftMode]);
 
   return (
     <div className="relative h-screen overflow-y-auto bg-[#F2F2F2] text-sm">

server/src/routes/scheduledSessions.ts

@@ -4,6 +4,7 @@ import Build from "../models/Build.js";
 import Schedule from "../models/Schedule.js";
 import {
   addMinutes,
+  addSeconds,
   areIntervalsOverlapping,
   endOfDay,
   isValid,
@@ -78,7 +79,7 @@ router.get("/:buildId", async (req, res) => {
 router.post("/", async (req, res) => {
   const { companyId, buildId, slot, startAt, client, duration } = req.body;
 
-  const startAtISO = parseISO(startAt);
+  let startAtISO = parseISO(startAt);
 
   if (!isValid(startAtISO)) {
     return res.status(400).json({
@@ -96,9 +97,50 @@ router.post("/", async (req, res) => {
     });
   }
 
+  // Check for conflicts at the same minute and adjust time if needed
+  // This prevents multiple sessions from starting simultaneously on the same server
+  // We check all sessions regardless of company, build, or slot to prevent server conflicts
+  let adjustedStartAt = startAtISO;
+  let maxAttempts = 100; // Prevent infinite loop
+  let attempts = 0;
+
+  while (attempts < maxAttempts) {
+    // Find sessions starting within 10 seconds of our target time
+    // This ensures sessions don't start simultaneously on the same session server
+    const conflictingSessions = await ScheduledSession.find({
+      startAt: {
+        $gte: adjustedStartAt,
+        $lt: addSeconds(adjustedStartAt, 10),
+      },
+    });
+
+    if (conflictingSessions.length === 0) {
+      // No conflict found, use this time
+      break;
+    }
+
+    // Find the latest conflicting session and schedule after it
+    // This gives the first build time to start and fill video memory
+    // so the second build will start on another server with more available memory
+    const latestSession = conflictingSessions.reduce((latest, session) =>
+      new Date(session.startAt) > new Date(latest.startAt) ? session : latest
+    );
+
+    adjustedStartAt = addSeconds(new Date(latestSession.startAt), 10);
+    attempts++;
+  }
+
+  if (attempts >= maxAttempts) {
+    return res.status(400).json({
+      status: "error",
+      message: "Не удалось найти свободное время для планирования сеанса",
+    });
+  }
+
+  startAtISO = adjustedStartAt;
   const endAtISO = addMinutes(startAtISO, duration);
 
-  // Check for overlapping sessions first
+  // Check for overlapping sessions in the same slot
   const scheduledSessions = await ScheduledSession.find({
     companyId,
     buildId,