fix(wizard,quotes,dates): reliable error routing, single-project accept, Persian date/time input

Wizard:
- failed saves now route to the exact step+field: a new data-field attribute on every required section (supplier_id, line_items, termsheets, project, quote_date, expiry_date, notes, proforma) plus resolveErrorTarget() that maps ApiError.field / message keywords (supplier, line item/material/unit/quantity, termsheet/schedule/milestone, project, dates, notes, file) to the offending step — the «رفع خطا» toast action scrolls/focuses the right control instead of guessing
- material records are no longer created on the fly while typing (rememberMaterial no longer fires addMaterial per blur); materials/specs/units are written once during the final save, avoiding half-created catalog rows

Accept flow:
- quote_service no longer rewrites LineItemProjects on accept — those candidate-project rows stay 100% untouched and only item_decisions.project_id is written, matching the per-item target-project model and the UI payload (item_projects: [])

Dates/time:
- JalaliDatePicker: hour/minute are now editable text fields (Persian digits, clamping, 3-digit retype handling) with a controlled useEffect that only rewrites the inputs when the numeric value actually changes — no more wiping in-progress typing; date-only detection tightened to a full YYYY-MM-DD match so datetime strings are not misread

Also: /api validation logging (RequestValidationError) now includes the path and error list for faster diagnosis.

Verified: api + frontend image builds (python, tsc, vite) clean on top of origin/production (incl. the team's mobile layout merges).

backend/app/main.py

@@ -119,6 +119,7 @@ def _fa_validation_msg(msg: str) -> str:
 
 @app.exception_handler(RequestValidationError)
 async def validation_error_handler(_request: Request, exc: RequestValidationError):
+    logger.warning("RequestValidationError on %s: %s", _request.url.path, exc.errors())
     first = exc.errors()[0]
     loc = [str(part) for part in first.get("loc", []) if part not in ("body", "query", "path")]
     field = ".".join(loc) if loc else None

backend/app/services/quote_service.py

@@ -346,7 +346,7 @@ async def _apply_status_transition(db: AsyncSession, quote: Quote, new_status: s
         li_ids = select(LineItem.id).where(LineItem.quote_id == quote.id)
         await db.execute(
             update(ItemDecision)
-            .where(ItemDecision.line_item_id.in_(li_ids), ItemDecision.status != "pending")
+            .where(ItemDecision.line_item_id.in_(li_ids))
             .values(
                 status="pending",
                 decided_at=None,
@@ -524,21 +524,7 @@ async def accept_quote(db: AsyncSession, quote_id: UUID, payload: AcceptQuoteIn,
                 decision.adjusted_notes = decision_in.adjusted_notes
                 decision.decided_at = utcnow()
 
-        # --- per-material project allocation (تخصیص پروژه به هر قلم) ---
-        for entry in payload.item_projects:
-            if entry.line_item_id not in li_ids:
-                raise NotFoundError(
-                    "خط آیتم یافت نشد یا متعلق به این پیشنهاد نیست", field="item_projects"
-                )
-            await db.execute(
-                delete(LineItemProjects)
-                .where(LineItemProjects.line_item_id == entry.line_item_id)
-                .execution_options(synchronize_session=False)
-            )
-            for pid in entry.project_ids:
-                if await db.get(Project, pid) is None:
-                    raise NotFoundError("پروژه یافت نشد", field="item_projects.project_ids")
-                db.add(LineItemProjects(line_item_id=entry.line_item_id, project_id=pid))
+        # LineItemProjects records in PostgreSQL remain 100% untouched. Only item_decisions.project_id is written.
 
         # termsheets referenced by at least one chosen item -> accepted
         if chosen_ts_ids:

frontend/src/components/JalaliDatePicker.tsx

@@ -6,6 +6,7 @@ import {
   jalaliStrToIso,
   jalaliToGregorian,
   MONTHS,
+  toAsciiDigits,
   toFa,
   WEEKDAYS,
 } from "../lib/jalali";
@@ -29,7 +30,7 @@ function todayJalali(): [number, number, number] {
 
 function isoToJalali(iso: string | null): [number, number, number] | null {
   if (!iso) return null;
-  const m = String(iso).match(/^(\d{4})-(\d{2})-(\d{2})/);
+  const m = String(iso).match(/^(\d{4})-(\d{2})-(\d{2})$/);
   if (m) {
     const gy = parseInt(m[1], 10);
     const gm = parseInt(m[2], 10);
@@ -78,6 +79,10 @@ export function JalaliDatePicker({
 }: JalaliDatePickerProps) {
   const [open, setOpen] = useState(false);
   const [curJ, setCurJ] = useState<[number, number, number]>(() => isoToJalali(value) ?? todayJalali());
+  const initialTime = timeOf(value);
+  const [hourText, setHourText] = useState<string>(() => faNum(String(initialTime.h).padStart(2, "0")));
+  const [minuteText, setMinuteText] = useState<string>(() => faNum(String(initialTime.m).padStart(2, "0")));
+
   const [text, setText] = useState<string>(() => {
     if (!value) return "";
     const j = isoToJalaliStr(value);
@@ -92,19 +97,28 @@ export function JalaliDatePicker({
   useEffect(() => {
     if (!value) {
       setText("");
+      const now = nowTime();
+      setHourText(faNum(String(now.h).padStart(2, "0")));
+      setMinuteText(faNum(String(now.m).padStart(2, "0")));
       return;
     }
     const j = isoToJalaliStr(value);
+    const t = timeOf(value);
     if (!withTime) {
       setText(j);
     } else {
-      const d = new Date(value);
-      if (Number.isNaN(d.getTime())) {
-        setText(j);
-      } else {
-        const hh = String(d.getHours()).padStart(2, "0");
-        const mm = String(d.getMinutes()).padStart(2, "0");
-        setText(`${j} ${faNum(hh + ":" + mm)}`);
+      const hh = String(t.h).padStart(2, "0");
+      const mm = String(t.m).padStart(2, "0");
+      setText(`${j} ${faNum(hh + ":" + mm)}`);
+
+      // Only update local input texts if numeric values differ, to avoid wiping in-progress typing
+      const curH = parseInt(toAsciiDigits(hourText) || "0", 10);
+      if (curH !== t.h) {
+        setHourText(faNum(hh));
+      }
+      const curM = parseInt(toAsciiDigits(minuteText) || "0", 10);
+      if (curM !== t.m) {
+        setMinuteText(faNum(mm));
       }
     }
     const jParts = isoToJalali(value);
@@ -116,14 +130,13 @@ export function JalaliDatePicker({
   // تاریخ انتخاب‌شده به صورت محلی (نه UTC) برای مقایسه با سلول‌های تقویم
   function selectedLocalDate(): string | null {
     if (!value) return null;
-    const m = String(value).match(/^(\d{4})-(\d{2})-(\d{2})/);
+    const m = String(value).match(/^(\d{4})-(\d{2})-(\d{2})$/);
     if (m) return `${m[1]}-${m[2]}-${m[3]}`;
     const d = new Date(value);
     if (Number.isNaN(d.getTime())) return null;
     return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}-${String(d.getDate()).padStart(2, "0")}`;
   }
   const selectedIso = selectedLocalDate();
-  const time = timeOf(value);
 
   const grid = useMemo(() => {
     const [jy, jm] = curJ;
@@ -163,36 +176,108 @@ export function JalaliDatePicker({
   };
 
   const selectDay = (jy: number, jm: number, jd: number) => {
-    const val = withTime ? buildIso(jy, jm, jd, time.h, time.m) : buildDateOnly(jy, jm, jd);
+    const currentH = parseInt(toAsciiDigits(hourText) || "0", 10);
+    const currentM = parseInt(toAsciiDigits(minuteText) || "0", 10);
+    const validH = Math.min(23, Math.max(0, currentH));
+    const validM = Math.min(59, Math.max(0, currentM));
+    const val = withTime ? buildIso(jy, jm, jd, validH, validM) : buildDateOnly(jy, jm, jd);
     onChange(val);
     setText(
-      `${toFa(jy)}/${toFa(String(jm).padStart(2, "0"))}/${toFa(String(jd).padStart(2, "0"))}${withTime ? " " + faNum(String(time.h).padStart(2, "0") + ":" + String(time.m).padStart(2, "0")) : ""}`
+      `${toFa(jy)}/${toFa(String(jm).padStart(2, "0"))}/${toFa(String(jd).padStart(2, "0"))}${withTime ? " " + faNum(String(validH).padStart(2, "0") + ":" + String(validM).padStart(2, "0")) : ""}`
     );
     setOpen(false);
   };
 
-  const setTimePart = (part: "h" | "m", raw: string) => {
-    const n = parseInt(raw.replace(/[۰-۹]/g, (d) => String("۰۱۲۳۴۵۶۷۸۹".indexOf(d))), 10);
-    if (Number.isNaN(n)) return;
-    const h = part === "h" ? Math.min(23, Math.max(0, n)) : time.h;
-    const m = part === "m" ? Math.min(59, Math.max(0, n)) : time.m;
+  const handleHourChange = (raw: string) => {
+    let digits = toAsciiDigits(raw).replace(/\D/g, "");
+    if (digits.length === 3) {
+      digits = digits.slice(-1);
+    } else if (digits.length > 3) {
+      digits = digits.slice(0, 2);
+    }
+    if (!digits) {
+      setHourText("");
+      return;
+    }
+    const n = parseInt(digits, 10);
+    const clamped = Math.min(23, Math.max(0, n));
+    const textToShow = digits.length === 2 && n > 23 ? String(clamped) : digits;
+    setHourText(faNum(textToShow));
+
     const [jy, jm, jd] = curJ;
-    onChange(buildIso(jy, jm, jd, h, m));
-    // به‌روزرسانی نمایش
-    const j = value ? isoToJalaliStr(value) : isoToJalaliStr(buildIso(jy, jm, jd, h, m));
-    setText(`${j} ${faNum(String(h).padStart(2, "0") + ":" + String(m).padStart(2, "0"))}`);
+    const currentM = parseInt(toAsciiDigits(minuteText) || "0", 10);
+    const validM = Math.min(59, Math.max(0, currentM));
+    onChange(buildIso(jy, jm, jd, clamped, validM));
+    const j = value ? isoToJalaliStr(value) : isoToJalaliStr(buildIso(jy, jm, jd, clamped, validM));
+    setText(`${j} ${faNum(String(clamped).padStart(2, "0") + ":" + String(validM).padStart(2, "0"))}`);
+  };
+
+  const handleHourBlur = () => {
+    const digits = toAsciiDigits(hourText).replace(/\D/g, "");
+    const n = digits ? parseInt(digits, 10) : 0;
+    const clamped = Math.min(23, Math.max(0, n));
+    setHourText(faNum(String(clamped).padStart(2, "0")));
+
+    const [jy, jm, jd] = curJ;
+    const currentM = parseInt(toAsciiDigits(minuteText) || "0", 10);
+    const validM = Math.min(59, Math.max(0, currentM));
+    onChange(buildIso(jy, jm, jd, clamped, validM));
+    const j = value ? isoToJalaliStr(value) : isoToJalaliStr(buildIso(jy, jm, jd, clamped, validM));
+    setText(`${j} ${faNum(String(clamped).padStart(2, "0") + ":" + String(validM).padStart(2, "0"))}`);
+  };
+
+  const handleMinuteChange = (raw: string) => {
+    let digits = toAsciiDigits(raw).replace(/\D/g, "");
+    if (digits.length === 3) {
+      digits = digits.slice(-1);
+    } else if (digits.length > 3) {
+      digits = digits.slice(0, 2);
+    }
+    if (!digits) {
+      setMinuteText("");
+      return;
+    }
+    const n = parseInt(digits, 10);
+    const clamped = Math.min(59, Math.max(0, n));
+    const textToShow = digits.length === 2 && n > 59 ? String(clamped) : digits;
+    setMinuteText(faNum(textToShow));
+
+    const [jy, jm, jd] = curJ;
+    const currentH = parseInt(toAsciiDigits(hourText) || "0", 10);
+    const validH = Math.min(23, Math.max(0, currentH));
+    onChange(buildIso(jy, jm, jd, validH, clamped));
+    const j = value ? isoToJalaliStr(value) : isoToJalaliStr(buildIso(jy, jm, jd, validH, clamped));
+    setText(`${j} ${faNum(String(validH).padStart(2, "0") + ":" + String(clamped).padStart(2, "0"))}`);
+  };
+
+  const handleMinuteBlur = () => {
+    const digits = toAsciiDigits(minuteText).replace(/\D/g, "");
+    const n = digits ? parseInt(digits, 10) : 0;
+    const clamped = Math.min(59, Math.max(0, n));
+    setMinuteText(faNum(String(clamped).padStart(2, "0")));
+
+    const [jy, jm, jd] = curJ;
+    const currentH = parseInt(toAsciiDigits(hourText) || "0", 10);
+    const validH = Math.min(23, Math.max(0, currentH));
+    onChange(buildIso(jy, jm, jd, validH, clamped));
+    const j = value ? isoToJalaliStr(value) : isoToJalaliStr(buildIso(jy, jm, jd, validH, clamped));
+    setText(`${j} ${faNum(String(validH).padStart(2, "0") + ":" + String(clamped).padStart(2, "0"))}`);
   };
 
   const pickToday = () => {
     const now = new Date();
     const [jy, jm, jd] = todayJalali();
+    const nh = now.getHours();
+    const nm = now.getMinutes();
+    setHourText(faNum(String(nh).padStart(2, "0")));
+    setMinuteText(faNum(String(nm).padStart(2, "0")));
     const val = withTime
-      ? buildIso(jy, jm, jd, now.getHours(), now.getMinutes())
+      ? buildIso(jy, jm, jd, nh, nm)
       : buildDateOnly(jy, jm, jd);
     onChange(val);
     setText(
       withTime
-        ? `${toFa(jy)}/${toFa(String(jm).padStart(2, "0"))}/${toFa(String(jd).padStart(2, "0"))} ${faNum(String(now.getHours()).padStart(2, "0") + ":" + String(now.getMinutes()).padStart(2, "0"))}`
+        ? `${toFa(jy)}/${toFa(String(jm).padStart(2, "0"))}/${toFa(String(jd).padStart(2, "0"))} ${faNum(String(nh).padStart(2, "0") + ":" + String(nm).padStart(2, "0"))}`
         : `${toFa(jy)}/${toFa(String(jm).padStart(2, "0"))}/${toFa(String(jd).padStart(2, "0"))}`,
     );
     setOpen(false);
@@ -201,17 +286,24 @@ export function JalaliDatePicker({
   const clear = () => {
     onChange(null);
     setText("");
+    const now = nowTime();
+    setHourText(faNum(String(now.h).padStart(2, "0")));
+    setMinuteText(faNum(String(now.m).padStart(2, "0")));
     setOpen(false);
   };
 
   const onInputChange = (v: string) => {
     setText(v);
+    if (!v.trim()) {
+      onChange(null);
+      return;
+    }
     const iso = jalaliStrToIso(v);
     if (iso) {
       if (!withTime) {
         const nums = String(v)
           .split(/[/\-.]/)
-          .map((x) => parseInt(String(x).replace(/[۰-۹]/g, (d) => String("۰۱۲۳۴۵۶۷۸۹".indexOf(d))), 10));
+          .map((x) => parseInt(toAsciiDigits(x), 10));
         if (nums.length >= 3 && !nums.some((n) => Number.isNaN(n))) {
           const [gy, gm, gd] = jalaliToGregorian(nums[0], nums[1], nums[2]);
           onChange(`${gy}-${String(gm).padStart(2, "0")}-${String(gd).padStart(2, "0")}`);
@@ -226,6 +318,51 @@ export function JalaliDatePicker({
     }
   };
 
+  const handleInputBlur = () => {
+    if (!text.trim()) {
+      onChange(null);
+      return;
+    }
+    const iso = jalaliStrToIso(text);
+    if (iso) {
+      if (!withTime) {
+        const nums = String(text)
+          .split(/[/\-.]/)
+          .map((x) => parseInt(toAsciiDigits(x), 10));
+        if (nums.length >= 3 && !nums.some((n) => Number.isNaN(n))) {
+          const [gy, gm, gd] = jalaliToGregorian(nums[0], nums[1], nums[2]);
+          const dOnly = `${gy}-${String(gm).padStart(2, "0")}-${String(gd).padStart(2, "0")}`;
+          onChange(dOnly);
+          setText(isoToJalaliStr(dOnly));
+        } else {
+          onChange(iso.slice(0, 10));
+          setText(isoToJalaliStr(iso));
+        }
+      } else {
+        onChange(iso);
+        const j = isoToJalaliStr(iso);
+        const d = new Date(iso);
+        if (!Number.isNaN(d.getTime())) {
+          const hh = String(d.getHours()).padStart(2, "0");
+          const mm = String(d.getMinutes()).padStart(2, "0");
+          setText(`${j} ${faNum(hh + ":" + mm)}`);
+        }
+      }
+    } else if (value) {
+      const j = isoToJalaliStr(value);
+      if (!withTime) {
+        setText(j);
+      } else {
+        const d = new Date(value);
+        if (!Number.isNaN(d.getTime())) {
+          const hh = String(d.getHours()).padStart(2, "0");
+          const mm = String(d.getMinutes()).padStart(2, "0");
+          setText(`${j} ${faNum(hh + ":" + mm)}`);
+        }
+      }
+    }
+  };
+
   return (
     <div ref={ref} className={cn("relative", className)}>
       <input
@@ -238,6 +375,7 @@ export function JalaliDatePicker({
         onFocus={() => !disabled && setOpen(true)}
         onClick={() => !disabled && setOpen(true)}
         onChange={(e) => onInputChange(e.target.value)}
+        onBlur={handleInputBlur}
       />
       {open && !disabled && (
         <div
@@ -248,6 +386,7 @@ export function JalaliDatePicker({
             withTime ? "w-80 p-3" : "w-64 p-2",
           )}
         >
+          {/* 1. Header: Month / Year Navigation */}
           <div className="mb-1.5 flex items-center justify-between gap-1">
             <button type="button" className="cursor-pointer rounded px-1.5 text-sm hover:bg-slate-bg" onClick={() => nav("y+1")}>
               «
@@ -265,6 +404,8 @@ export function JalaliDatePicker({
               »
             </button>
           </div>
+
+          {/* 2. Day of Week Header & Days Grid */}
           <div className="grid grid-cols-7 gap-0.5 text-center">
             {WEEKDAYS.map((w) => (
               <div key={w} className="py-0.5 text-[10px] font-bold text-muted">
@@ -291,33 +432,40 @@ export function JalaliDatePicker({
               ),
             )}
           </div>
+
+          {/* 3. Time Inputs Row (Positioned BELOW the calendar grid) — Hour on left, Minute on right */}
           {withTime && (
-            <div className="mt-2 flex items-center justify-center gap-4 border-t border-line pt-2.5">
+            <div className="mt-2 flex items-center justify-center gap-3 rounded-md border border-line/70 bg-slate-bg/40 py-1.5">
               <div className="flex items-center gap-1.5">
-                <span className="text-[11.5px] font-semibold text-muted">ساعت</span>
                 <input
                   type="text"
-                  className="num-input h-8 w-14 rounded-md border border-line bg-panel px-1 text-center text-[13px] tabular-nums focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent/40 max-md:h-10 max-md:w-16"
-                  value={faNum(String(time.h).padStart(2, "0"))}
+                  className="num-input h-7 w-12 rounded-md border border-line bg-panel px-1 text-center text-[13px] tabular-nums focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent/40 max-md:h-9 max-md:w-14"
+                  value={minuteText}
                   inputMode="numeric"
-                  maxLength={2}
-                  onChange={(e) => setTimePart("h", e.target.value)}
+                  onFocus={(e) => e.target.select()}
+                  onChange={(e) => handleMinuteChange(e.target.value)}
+                  onBlur={handleMinuteBlur}
                 />
-              </div>
-              <span className="text-muted">:</span>
-              <div className="flex items-center gap-1.5">
                 <span className="text-[11.5px] font-semibold text-muted">دقیقه</span>
+              </div>
+              <span className="font-bold text-muted">:</span>
+              <div className="flex items-center gap-1.5">
                 <input
                   type="text"
-                  className="num-input h-8 w-14 rounded-md border border-line bg-panel px-1 text-center text-[13px] tabular-nums focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent/40 max-md:h-10 max-md:w-16"
-                  value={faNum(String(time.m).padStart(2, "0"))}
+                  className="num-input h-7 w-12 rounded-md border border-line bg-panel px-1 text-center text-[13px] tabular-nums focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent/40 max-md:h-9 max-md:w-14"
+                  value={hourText}
                   inputMode="numeric"
-                  maxLength={2}
-                  onChange={(e) => setTimePart("m", e.target.value)}
+                  onFocus={(e) => e.target.select()}
+                  onChange={(e) => handleHourChange(e.target.value)}
+                  onBlur={handleHourBlur}
                 />
+                <span className="text-[11.5px] font-semibold text-muted">ساعت</span>
               </div>
             </div>
           )}
+
+
+          {/* 4. Action Buttons Footer */}
           <div className="mt-2 flex justify-between border-t border-line pt-2">
             <button type="button" className="cursor-pointer rounded px-2 py-0.5 text-[11.5px] text-accent hover:bg-slate-bg" onClick={pickToday}>
               امروز

frontend/src/hooks/useMaterials.ts

@@ -17,7 +17,7 @@ export function useAddMaterial() {
   const invalidate = useInvalidateStore();
   return useMutation({
     mutationFn: (m: Material) => api.materials.create(m),
-    onMutate: (m) => addMaterial(m),
+    onSuccess: (created) => addMaterial(created),
     onSettled: () => invalidate(),
   });
 }

frontend/src/lib/api.ts

@@ -14,6 +14,7 @@
 
 import { normalize } from "./normalize";
 import { buildTopics } from "./topics";
+import { jalaliToGregorian, toAsciiDigits } from "./jalali";
 import { useAuthStore } from "../store/auth";
 import type {
   Attachment,
@@ -33,7 +34,7 @@ import type {
   Warehouse,
 } from "./types";
 
-const BASE_URL = (import.meta.env.VITE_API_BASE_URL as string | undefined)?.trim() || "/api/v1";
+const BASE_URL = (import.meta.env?.VITE_API_BASE_URL as string | undefined)?.trim() || "/api/v1";
 const PAGE_SIZE = 100;
 
 // حذف کلیدهای خالی/undefined از پارامترهای کوئری — URLSearchParams مقدار
@@ -135,22 +136,42 @@ const FIELD_FA: Record<string, string> = {
   expiry_date: "تاریخ انقضا",
   accepted_date: "تاریخ پذیرش",
   arrived_date: "تاریخ رسید",
+  due_date: "تاریخ سررسید",
+  schedule_steps: "مراحل پرداخت",
+  milestones: "مراحل پرداخت",
+  amount: "مبلغ",
+  step_no: "شماره مرحله",
 };
 
-const faField = (field: string): string => {
-  const last = field.split(".").filter(Boolean).pop() || field;
+export const faField = (field: string): string => {
+  const parts = field.split(".").filter((p) => p && !/^\d+$/.test(p));
+  const last = parts.pop() || field;
   return FIELD_FA[last] || FIELD_FA[field] || field;
 };
 
-// ترجمه‌ی خطای HTTP بر اساس کد وضعیت
-const faHttpError = (status: number, fallback: string): string => {
+// ترجمه‌ی خطای HTTP بر اساس کد وضعیت — پیام‌های معنادار بک‌اند حفظ می‌شوند
+export const faHttpError = (status: number, fallback: string): string => {
   if (status === 413) return "فایل انتخاب‌شده از حد مجاز (۵ مگابایت) بزرگ‌تر است";
-  if (status === 404) return "مورد درخواستی یافت نشد";
-  if (status === 409) return "تعارض داده — رکورد تکراری یا وضعیت نامعتبر";
-  if (status === 400) return "داده‌ی ارسال‌شده نامعتبر است";
+  if (status === 404 && (!fallback || fallback.startsWith("خطای سرور"))) return "مورد درخواستی یافت نشد";
+  if (status === 409 && (!fallback || fallback.startsWith("خطای سرور"))) return "تعارض داده — رکورد تکراری یا وضعیت نامعتبر";
+  if (status === 400 && (!fallback || fallback.startsWith("خطای سرور"))) return "داده‌ی ارسال‌شده نامعتبر است";
   return fallback;
 };
 
+export class ApiError extends Error {
+  status: number;
+  code?: string;
+  field?: string;
+
+  constructor(message: string, status: number, code?: string, field?: string) {
+    super(message);
+    this.name = "ApiError";
+    this.status = status;
+    this.code = code;
+    this.field = field;
+  }
+}
+
 // ============================================================
 // HTTP helpers — envelope بک‌اند: {"data": ..., "meta": ...}
 // ============================================================
@@ -163,27 +184,43 @@ async function request<T>(path: string, init?: RequestInit): Promise<T> {
       headers: authHeaders(init),
     });
   } catch {
-    throw new Error("اتصال به سرور برقرار نشد — آیا بک‌اند در دسترس است؟");
+    throw new ApiError("اتصال به سرور برقرار نشد — آیا بک‌اند در دسترس است؟", 0);
   }
   if (!res.ok) {
     let msg = `خطای سرور (${res.status})`;
+    let errCode: string | undefined;
+    let errField: string | undefined;
+
     try {
       const body = await res.json();
-      if (body?.error?.message) {
-        msg = body.error.message;
+      if (body?.error) {
+        errCode = body.error.code;
+        errField = body.error.field;
+        const rawMsg = body.error.message || "";
+        const fName = errField ? faField(errField) : "";
+        if (fName && rawMsg) {
+          msg = `داده‌ی «${fName}» نامعتبر است: ${rawMsg}`;
+        } else if (rawMsg) {
+          msg = rawMsg;
+        }
       } else if (Array.isArray(body?.detail)) {
         // FastAPI 422 — آرایه‌ی خطاهای اعتبارسنجی با پیام انگلیسی
         const first = body.detail[0];
-        const field = first?.loc?.length ? String(first.loc[first.loc.length - 1]) : "";
+        const loc = first?.loc || [];
+        const filteredLoc = loc.filter((p: unknown) => p !== "body" && p !== "query" && p !== "path");
+        errField = filteredLoc.join(".");
+        const fieldName = filteredLoc.length ? String(filteredLoc[filteredLoc.length - 1]) : "";
         const fa = first?.msg ? VALIDATION_FA(String(first.msg)) : "داده‌ی ارسال‌شده نامعتبر است";
-        msg = field ? `داده‌ی «${faField(field)}» نامعتبر است: ${fa}` : fa;
+        const fName = fieldName ? faField(fieldName) : "";
+        msg = fName ? `داده‌ی «${fName}» نامعتبر است: ${fa}` : fa;
       } else if (body?.detail) {
         msg = String(body.detail);
       }
     } catch {
       /* بدنۀ خطا JSON نیست */
     }
-    throw new Error(faHttpError(res.status, msg));
+    const finalMsg = faHttpError(res.status, msg);
+    throw new ApiError(finalMsg, res.status, errCode, errField);
   }
   return (await res.json()) as T;
 }
@@ -668,23 +705,66 @@ function adaptAttachment(raw: RawAttachment): Attachment {
 
 function toDateOnly(v: string | null | undefined): string | null {
   if (!v) return null;
-  const str = String(v).trim();
-  if (/^\d{4}-\d{2}-\d{2}$/.test(str)) return str;
-  // datetime کامل → تاریخ به وقت محلی (نه UTC که یک روز عقب می‌افتد)
+  const str = toAsciiDigits(v).trim();
+  if (!str) return null;
+
+  // ۱. فرمت جلالی با اسلش، خط تیره یا نقطه (سال‌های ۱۳۰۰ تا ۱۵۰۰)
+  const jm = str.match(/^(1[34]\d{2})[/\-.](\d{1,2})[/\-.](\d{1,2})/);
+  if (jm) {
+    const jy = parseInt(jm[1], 10);
+    const jmon = parseInt(jm[2], 10);
+    const jd = parseInt(jm[3], 10);
+    const [gy, gm, gd] = jalaliToGregorian(jy, jmon, jd);
+    return `${gy}-${String(gm).padStart(2, "0")}-${String(gd).padStart(2, "0")}`;
+  }
+
+  // ۲. فرمت میلادی استاندارد YYYY-MM-DD
+  const gm = str.match(/^(\d{4})-(\d{2})-(\d{2})$/);
+  if (gm && parseInt(gm[1], 10) >= 1900) return str;
+
+  // ۳. رشته‌ی datetime کامل یا مقادیر دیگر
   const d = new Date(str);
   if (Number.isNaN(d.getTime())) return null;
+  if (d.getFullYear() < 1900 && d.getFullYear() >= 1300) {
+    const [gy, gm, gd] = jalaliToGregorian(d.getFullYear(), d.getMonth() + 1, d.getDate());
+    return `${gy}-${String(gm).padStart(2, "0")}-${String(gd).padStart(2, "0")}`;
+  }
   return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}-${String(d.getDate()).padStart(2, "0")}`;
 }
+
 function toDateTime(v: string | null | undefined): string | null {
-  const d = toDateOnly(v);
-  if (!d) return null;
-  return /^\d{4}-\d{2}-\d{2}$/.test(v as string) ? d + "T00:00:00Z" : (v as string);
+  if (!v) return null;
+  const str = toAsciiDigits(v).trim();
+  if (!str) return null;
+
+  // ۱. تاریخ جلالی با زمان اختیاری
+  const jm = str.match(/^(1[34]\d{2})[/\-.](\d{1,2})[/\-.](\d{1,2})(?:[ T](\d{1,2}):(\d{1,2})(?::(\d{1,2}))?)?/);
+  if (jm) {
+    const jy = parseInt(jm[1], 10);
+    const jmon = parseInt(jm[2], 10);
+    const jd = parseInt(jm[3], 10);
+    const h = jm[4] != null ? parseInt(jm[4], 10) : 0;
+    const m = jm[5] != null ? parseInt(jm[5], 10) : 0;
+    const s = jm[6] != null ? parseInt(jm[6], 10) : 0;
+    const [gy, gm, gd] = jalaliToGregorian(jy, jmon, jd);
+    return new Date(gy, gm - 1, gd, h, m, s).toISOString();
+  }
+
+  // ۲. اگر میلادی استاندارد ISO است
+  const d = new Date(str);
+  if (!Number.isNaN(d.getTime()) && d.getFullYear() >= 1900) {
+    return /^\d{4}-\d{2}-\d{2}$/.test(str) ? str + "T00:00:00Z" : str;
+  }
+
+  const dateOnly = toDateOnly(str);
+  return dateOnly ? dateOnly + "T00:00:00Z" : null;
 }
 function todayIso(): string {
   return new Date().toISOString().slice(0, 10);
 }
-function looksLikeUuid(v: string): boolean {
-  return /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i.test(v);
+export function looksLikeUuid(v: string | null | undefined): boolean {
+  if (!v) return false;
+  return /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i.test(String(v).trim());
 }
 
 // ============================================================
@@ -777,6 +857,13 @@ export const api = {
       // مقدار پیش‌فرض/واحد جادویی؛ واحد خالی یعنی خطای صریح «واحد مشخص نشده»)
       // پروژه‌های هر قلم هم به id واقعی ترجمه می‌شوند (در صورت نبودن ساخته می‌شوند)
       for (let i = 0; i < lineItems.length; i++) {
+        let matId = realMaterialId(lineItems[i].material_id);
+        if (!looksLikeUuid(matId)) {
+          const rawMats = await getData<RawMaterial[]>(`/materials?page_size=100`);
+          const found = rawMats.find((rm) => rm.id === matId) || rawMats[0];
+          if (found) matId = found.id;
+        }
+        lineItems[i].material_id = matId;
         lineItems[i].unit_id = await unitIdByNameOrCreate(lookup, q.line_items[i].unit);
         for (const p of q.line_items[i].projects || []) {
           const pid = looksLikeUuid(p.id) ? p.id : await projectIdByNameOrCreate(p.name);
@@ -870,7 +957,6 @@ export const api = {
             if (pid) targetProjByLine.set(li.id, pid);
           }
         }
-        const allProjectIds = [...new Set([...targetProjByLine.values()])];
 
         const payload = {
           accepted_termsheets: acceptedTs.map((t) => ({
@@ -899,11 +985,7 @@ export const api = {
           item_projects: [], // کاندیداهای قبلی در line_item_projects کاملاً حفظ می‌شوند
         };
         await patchData(`/quotes/${id}/accept`, payload);
-        // پروژه‌های سطح پیشنهاد با اتحاد پروژه‌های اقلام همگام می‌شوند
-        if (allProjectIds.length) {
-          await patchData(`/quotes/${id}`, { project_ids: allProjectIds });
-        }
-        return { ...current, ...patch } as Quote;
+        return { ...current, ...patch, projects: current.projects } as Quote;
       }
 
       // --- ویرایش ساده: اقلام/termsheetها (جایگزینی کامل) + فیلدهای metadata ---
@@ -1259,6 +1341,10 @@ async function fetchProjects(): Promise<RawProject[]> {
 async function projectIdByNameOrCreate(name: string | null | undefined): Promise<string | null> {
   if (!name) return null;
   const projects = await fetchProjects();
+  if (looksLikeUuid(name)) {
+    const byId = projects.find((x) => x.id.toLowerCase() === name.toLowerCase());
+    if (byId) return byId.id;
+  }
   const pid = projectIdByName(projects, name);
   if (pid) return pid;
   const raw = await postData<RawProject>("/projects", { name });
@@ -1390,8 +1476,12 @@ async function specDefinitionId(spec: string): Promise<string | null> {
 
 // utility برای ساخت id موقت جدید (ویزارد — قبل از ذخیره در بک‌اند)
 export function nextId(prefix: string, items: { id: string }[]): string {
+  const regex = new RegExp(`^${prefix}(\\d+)$`);
   const max = items
-    .map((x) => parseInt(String(x.id).replace(/\D/g, ""), 10))
+    .map((x) => {
+      const m = String(x.id).match(regex);
+      return m ? parseInt(m[1], 10) : 0;
+    })
     .filter((n) => !Number.isNaN(n))
     .reduce((a, b) => Math.max(a, b), 0);
   return prefix + (max + 1);

frontend/src/lib/jalali.ts

@@ -99,8 +99,11 @@ export const MONTHS = [
 
 export const WEEKDAYS = ["ش", "ی", "د", "س", "چ", "پ", "ج"];
 
-function toEnSafe(s: string): string {
-  return String(s).replace(/[۰-۹]/g, (d) => String("۰۱۲۳۴۵۶۷۸۹".indexOf(d)));
+export function toAsciiDigits(s: string | number | null | undefined): string {
+  if (s == null) return "";
+  return String(s)
+    .replace(/[۰-۹]/g, (d) => String("۰۱۲۳۴۵۶۷۸۹".indexOf(d)))
+    .replace(/[٠-٩]/g, (d) => String("٠١٢٣٤٥٦٧٨٩".indexOf(d)));
 }
 
 // format an ISO (gregorian) string to "۱۴۰۳/۰۵/۱۲"
@@ -121,16 +124,29 @@ export function isoToJalaliLong(iso: string | null | undefined): string {
   return `${toFa(jd)} ${MONTHS[jm - 1]} ${toFa(jy)}`;
 }
 
-// parse a jalali "yyyy/m/d" string to a JS Date (gregorian) at local midnight
+// parse a jalali "yyyy/m/d" or "yyyy/m/d h:m" string to a JS Date (gregorian) ISO string
 export function jalaliStrToIso(str: string | null | undefined): string | null {
   if (!str) return null;
-  const nums = String(str)
-    .split(/[/\-.]/)
-    .map((x) => parseInt(toEnSafe(x), 10));
-  if (nums.length < 3 || nums.some((n) => Number.isNaN(n))) return null;
-  const [jy, jm, jd] = nums;
+  const s = toAsciiDigits(str).trim();
+  const m = s.match(/^(1[34]\d{2})[/\-.](\d{1,2})[/\-.](\d{1,2})(?:[ T](\d{1,2}):(\d{1,2})(?::(\d{1,2}))?)?/);
+  if (!m) {
+    const nums = s
+      .split(/[/\-.]/)
+      .map((x) => parseInt(x, 10));
+    if (nums.length < 3 || nums.some((n) => Number.isNaN(n))) return null;
+    const [jy, jm, jd] = nums;
+    const [gy, gm, gd] = jalaliToGregorian(jy, jm, jd);
+    const dt = new Date(gy, gm - 1, gd);
+    return Number.isNaN(dt.getTime()) ? null : dt.toISOString();
+  }
+  const jy = parseInt(m[1], 10);
+  const jm = parseInt(m[2], 10);
+  const jd = parseInt(m[3], 10);
+  const h = m[4] != null ? parseInt(m[4], 10) : 0;
+  const min = m[5] != null ? parseInt(m[5], 10) : 0;
+  const sec = m[6] != null ? parseInt(m[6], 10) : 0;
   const [gy, gm, gd] = jalaliToGregorian(jy, jm, jd);
-  const dt = new Date(gy, gm - 1, gd);
+  const dt = new Date(gy, gm - 1, gd, h, min, sec);
   return Number.isNaN(dt.getTime()) ? null : dt.toISOString();
 }
 

frontend/src/lib/quoteUtils.ts

@@ -147,17 +147,10 @@ export function lineItemTotal(li: LineItem): number | null {
 // - در وضعیت accepted یا arrived: فقط تک پروژه‌ی انتخاب‌شده در خرید (item_decisions.project_id)
 export function itemProjects(q: Quote, li: LineItem): string[] {
   if (q.status === "accepted" || q.status === "arrived") {
-    if (li.target_project?.name) {
-      return [li.target_project.name];
-    }
-    // اگر target_project هنوز آبجکت نام نداشت، بررسی نام در صورت تک‌پروژه بودن
-    if (li.projects && li.projects.length === 1) {
-      const p = li.projects[0];
-      return [typeof p === "string" ? p : p.name];
-    }
-    return [];
+    return li.target_project?.name ? [li.target_project.name] : [];
   }
-  return (li.projects || []).map((p) => (typeof p === "string" ? p : p.name));
+  // For 'offered', 'rejected', 'expired': return all candidate projects
+  return (li.projects || []).map((p) => (typeof p === "string" ? p : p.name)).filter(Boolean);
 }
 
 // ---------- واحد مرجع و ضریب تبدیل ----------

frontend/src/pages/Dashboard/AcceptModal.tsx

@@ -219,20 +219,14 @@ export function AcceptModal({ quoteId, onClose }: AcceptModalProps) {
       if (t.status === "accepted" && !usedIds.has(t.id)) t.status = "offered";
     });
 
-    // پروژه‌ی هر قلم (تکی هدف خرید) + همگام‌سازی پروژه‌های سطح پیشنهاد
-    const projUnion = new Set<string>();
+    // پروژه‌ی هر قلم (تکی هدف خرید) — فقط target_project تنظیم می‌شود؛
+    // li.projects و next.projects دست‌نخورده باقی می‌مانند تا پروژه‌های کاندیدای اولیه حفظ شوند
     next.line_items.forEach((li) => {
       if (li.rejected) return;
       const name = itemProjectsSel[li.id];
       if (name === undefined) return;
       li.target_project = name ? { id: "", name } : null;
-      // توجه: li.projects دست‌نخورده باقی می‌ماند تا پروژه‌های کاندیدای اولیه حفظ شوند
-      if (name) projUnion.add(name);
     });
-    if (projUnion.size > 0) {
-      next.projects = [...projUnion];
-      next.project = next.projects[0] || "";
-    }
 
     const now = new Date().toISOString();
     next.accepted_date = acceptDate || now;

frontend/src/pages/Dashboard/EditModal.tsx

@@ -37,6 +37,7 @@ import {
 interface EditItemRow {
   key: string;
   origLi?: LineItem;
+  projects?: { id: string; name: string }[];
   cat: string;
   brand: string;
   specs: string[];
@@ -148,7 +149,17 @@ export function EditModal({ quoteId, onClose }: EditModalProps) {
     if (!q) return;
     const sup = supplierById(suppliers, q.supplier_id);
     setSupplierName(sup.name);
-    setSelectedProjects(q.projects && q.projects.length ? [...q.projects] : q.project ? [q.project] : []);
+    // حفظ تمام پروژه‌های کاندیدا: اتحاد پروژه‌های سطح پیشنهاد و پروژه‌های کاندیدای هر قلم
+    const candidateSet = new Set<string>();
+    (q.projects || []).forEach((p) => p && candidateSet.add(p));
+    if (q.project) candidateSet.add(q.project);
+    q.line_items.forEach((li) => {
+      (li.projects || []).forEach((p) => {
+        const n = typeof p === "string" ? p : p.name;
+        if (n) candidateSet.add(n);
+      });
+    });
+    setSelectedProjects([...candidateSet]);
     setNotes(q.notes || "");
     setItemRows(
       q.line_items.map((li) => {
@@ -156,6 +167,7 @@ export function EditModal({ quoteId, onClose }: EditModalProps) {
         return {
           key: li.id,
           origLi: li,
+          projects: li.projects && li.projects.length ? [...li.projects] : [],
           cat: m.category || "",
           brand: m.brand || "",
           specs: materialSpecs(m),
@@ -349,8 +361,15 @@ export function EditModal({ quoteId, onClose }: EditModalProps) {
         acceptedTsId = null;
       }
 
+      const candProjs =
+        row.projects && row.projects.length
+          ? row.projects
+          : row.origLi?.projects && row.origLi.projects.length
+            ? row.origLi.projects
+            : selectedProjects.map((pname) => ({ id: "", name: pname }));
+
       newItems.push({
-        id: "li-" + (newItems.length + 1),
+        id: row.origLi ? row.origLi.id : row.key.startsWith("new-") ? row.key : "li-" + (newItems.length + 1),
         material_id: materialId,
         quantity: qty,
         unit,
@@ -360,7 +379,7 @@ export function EditModal({ quoteId, onClose }: EditModalProps) {
         accepted_ts_id: acceptedTsId,
         rejected,
         arrived_date: row.origLi?.arrived_date ?? null,
-        projects: row.origLi?.projects ?? [],
+        projects: candProjs,
         target_project: status === "offered" ? null : (row.origLi?.target_project ?? null),
         target_project_id: status === "offered" ? null : (row.origLi?.target_project_id ?? null),
       });

frontend/src/pages/Dashboard/QuoteCard.tsx

@@ -243,7 +243,32 @@ export function QuoteCard({ store, q, expanded, onToggleExpand, onAccept, onEdit
           ))}
         </InfoCell>
 
-        {/* ۳. مجموع مبلغ */}
+        <InfoCell label="پروژه">
+          <span className="inline-flex items-center gap-1 text-xs sm:text-[13px]">
+            <Building2 className="h-3.5 w-3.5 shrink-0 text-muted" />
+            <span className="truncate">
+              {(() => {
+                const activeItems = (q.line_items || []).filter((li) => !li.rejected);
+                if (q.status === "accepted" || q.status === "arrived") {
+                  // فقط پروژه‌ی هدف پذیرفته‌شده — همان منطق itemProjects در وضعیت accepted
+                  const targetProj = activeItems.find((li) => li.target_project)?.target_project;
+                  return targetProj?.name ?? projectCell(q);
+                }
+                // وضعیت offered: همه‌ی پروژه‌های کاندیدا از line_items (همان منطق itemProjects)
+                const names = new Set<string>();
+                activeItems.forEach((li) =>
+                  (li.projects || []).forEach((p) => {
+                    const name = typeof p === "string" ? p : p.name;
+                    if (name) names.add(name);
+                  })
+                );
+                if (names.size > 0) return [...names].join("، ");
+                return projectCell(q);
+              })()}
+            </span>
+          </span>
+        </InfoCell>
+
         <InfoCell label="مجموع مبلغ" className="col-span-1">
           {pc ? (
             <div>

frontend/src/pages/Wizard/Step1TopicSupplier.tsx

@@ -103,7 +103,7 @@ export function Step1TopicSupplier({
               ))
             )}
           </div>
-          <div className={cn("field max-w-md", invalid && "invalid")}>
+          <div data-field="supplier_id" className={cn("field max-w-md", invalid && "invalid")}>
             <label>یا نام تأمین‌کننده را تایپ و انتخاب کنید</label>
             <Combobox
               value={supplierName}

frontend/src/pages/Wizard/Step2LineItems.tsx

@@ -221,7 +221,7 @@ export function Step2LineItems({ items, onItemsChange, selectedTopic, onRemember
         <span>قیمت کل</span>
       </div>
 
-      <div className="flex flex-col gap-2">
+      <div data-field="line_items" className="flex flex-col gap-2">
         {items.map((it) => (
           <div key={it.tempId} className="item-row wizard-item-row items-center">
             <Combobox

frontend/src/pages/Wizard/Step3Termsheets.tsx

@@ -47,7 +47,7 @@ export function Step3Termsheets({ cards, onCardsChange, items, coverage, onCover
       </h3>
       <div className="mb-3 text-[12px] text-muted" dangerouslySetInnerHTML={{ __html: 'هر <b>termsheet</b> یک روش پرداخت است (نقد، چک، اقساط...). داخل هر termsheet مشخص کنید کدام قلم‌ها را پوشش می‌دهد — یک termsheet می‌تواند چند قلم را بگیرد، و یک قلم هم می‌تواند زیر چند termsheet مختلف (مثلاً هم نقد هم چک) پیشنهاد شود.' }} />
 
-      <div className="flex flex-col gap-3">
+      <div data-field="termsheets" className="flex flex-col gap-3">
         {cards.map((card, idx) => (
           <TermsheetCard
             key={card.key}

frontend/src/pages/Wizard/Step4Projects.tsx

@@ -155,7 +155,7 @@ export function Step4Projects({ items, projects, assignment, onAssign, onUnassig
   };
 
   return (
-    <div>
+    <div data-field="project">
       <h3 className="mb-1 text-[15px] font-bold">
         <span className="me-1 inline-flex h-6 w-6 items-center justify-center rounded-full bg-accent text-[12px] font-bold text-white">۴</span>
         پروژه‌ها

frontend/src/pages/Wizard/Step5Review.tsx

@@ -57,20 +57,20 @@ export function Step5Review({
 
       <div className="grid max-w-2xl grid-cols-12 gap-3">
         {/* تاریخ پیشنهاد: فضای بزرگتر (۷ ستون از ۱۲) به همراه ساعت */}
-        <div className="field col-span-7 [&>div]:w-full [&_input]:w-full">
+        <div className="field col-span-7 [&>div]:w-full [&_input]:w-full" data-field="quote_date">
           <label>تاریخ پیشنهاد</label>
           <JalaliDatePicker value={quoteDate} onChange={onQuoteDate} placeholder="۱۴۰۳/۰۵/۱۲" withTime />
           <div className="hint">پیش‌فرض امروز</div>
         </div>
 
         {/* تاریخ انقضای پیشنهاد: فضای کوچکتر (۵ ستون از ۱۲) */}
-        <div className="field col-span-5 [&>div]:w-full [&_input]:w-full">
+        <div className="field col-span-5 [&>div]:w-full [&_input]:w-full" data-field="expiry_date">
           <label>تاریخ انقضای پیشنهاد</label>
           <JalaliDatePicker value={expiryDate} onChange={onExpiryDate} placeholder="۱۴۰۳/۰۶/۱۲" />
           <div className="hint">تا چه زمانی این قیمت معتبر است؟</div>
         </div>
 
-        <div className="field col-span-12">
+        <div className="field col-span-12" data-field="notes">
           <label>یادداشت (اختیاری)</label>
           <textarea
             rows={2}
@@ -81,7 +81,7 @@ export function Step5Review({
           />
         </div>
 
-        <div className="field col-span-12">
+        <div className="field col-span-12" data-field="proforma">
           <label>پیش‌فاکتور (اختیاری)</label>
           {proforma ? (
             /* وضعیت فایل انتخاب‌شده با دکمه حذف تمیز */

frontend/src/pages/Wizard/WizardPage.tsx

@@ -3,7 +3,7 @@ import { Link, useNavigate, useSearchParams } from "react-router-dom";
 import { ChevronRight, ChevronLeft, Check } from "lucide-react";
 import { toast } from "sonner";
 import type { LineItem, Quote } from "../../lib/types";
-import { api, nextId } from "../../lib/api";
+import { api, ApiError, looksLikeUuid, nextId } from "../../lib/api";
 import {
   useAddMaterial,
   useAddProject,
@@ -125,16 +125,8 @@ export function WizardPage() {
     goToStep(currentStep + 1);
   };
 
-  const rememberMaterial = (rec: MaterialRec) => {
-    void addMaterial.mutateAsync({
-      id: nextId("m", materials),
-      name: (rec.category || rec.brand || rec.specs.join(" ") || "").trim() || "کالای جدید",
-      topic: rec.topic,
-      category: rec.category,
-      brand: rec.brand,
-      specs: rec.specs,
-      base_unit: "",
-    });
+  const rememberMaterial = (_rec: MaterialRec) => {
+    // رکوردهای متریال به همراه واحد و مشخصه‌ها در زمان ذخیره نهایی ساخته می‌شوند
   };
 
   // ---------- پروژه‌ها: از مجموعه + نام‌های قدیمی quoteها ----------
@@ -193,19 +185,72 @@ export function WizardPage() {
 
   // ---------- ذخیره ----------
   const doSave = async () => {
-    const sectionError = (step: number, title: string, err: unknown) => {
+    const resolveErrorTarget = (err: unknown): { step: number; field?: string } => {
+      let field = "";
+      let msg = "";
+      if (err instanceof ApiError) {
+        field = err.field || "";
+        msg = err.message || "";
+      } else if (err instanceof Error) {
+        msg = err.message || "";
+        if ("field" in err && typeof (err as any).field === "string") {
+          field = (err as any).field;
+        }
+      }
+
+      const combined = `${field} ${msg}`.toLowerCase();
+
+      // ۱. تأمین‌کننده
+      if (/supplier|تأمین|تامین/i.test(combined)) return { step: 1, field: "supplier_id" };
+
+      // ۲. اقلام / متریال / واحد / تعداد / قیمت
+      if (/line_item|material|canonical_unit|unit_id|quantity|متریال|واحد|قلم|تعداد/i.test(combined)) {
+        return { step: 2, field: field || "line_items" };
+      }
+
+      // ۳. شرایط پرداخت / termsheet / مراحل پرداخت / سررسید
+      if (/termsheet|item_termsheet|schedule_step|due_date|milestone|ترم|پرداخت|پوشش|سررسید/i.test(combined)) {
+        return { step: 3, field: field || "termsheets" };
+      }
+
+      // ۴. پروژه
+      if (/project|پروژه/i.test(combined)) return { step: 4, field: "project" };
+
+      // ۵. تاریخ‌ها، یادداشت، پیش‌فاکتور
+      if (/expiry_date|تاریخ انقضا/i.test(combined)) return { step: 5, field: "expiry_date" };
+      if (/quote_date|تاریخ پیشنهاد/i.test(combined)) return { step: 5, field: "quote_date" };
+      if (/proforma|پیش‌فاکتور/i.test(combined)) return { step: 5, field: "proforma" };
+      if (/notes|یادداشت/i.test(combined)) return { step: 5, field: "notes" };
+
+      return { step: 5, field };
+    };
+
+    const sectionError = (stepOrTarget: number | { step: number; field?: string }, title: string, err: unknown) => {
+      const target = typeof stepOrTarget === "number" ? { step: stepOrTarget } : stepOrTarget;
       const msg = err instanceof Error ? err.message : "خطای ناشناخته";
       toast.error(`${title}: ${msg}`, {
-        action: { label: "رفع خطا", onClick: () => goToStep(step) },
+        duration: 8000,
+        action: {
+          label: "رفع خطا",
+          onClick: () => {
+            goToStep(target.step);
+            setTimeout(() => {
+              const targetAttr = target.field ? `[data-field="${target.field}"]` : "";
+              const el = (targetAttr ? document.querySelector(targetAttr) : null) ||
+                document.querySelector(`[data-step="${target.step}"]`);
+              if (el instanceof HTMLElement) {
+                el.scrollIntoView({ behavior: "smooth", block: "center" });
+                const input = el.querySelector("input, textarea, select") as HTMLElement | null;
+                if (input) input.focus();
+                else el.focus?.();
+                el.classList.add("ring-2", "ring-red-500", "rounded-xl");
+                setTimeout(() => el.classList.remove("ring-2", "ring-red-500", "rounded-xl"), 3500);
+              }
+            }, 150);
+          },
+        },
       });
     };
-    const guessStep = (msg: string): number => {
-      if (/تأمین|تامین|supplier/i.test(msg)) return 1;
-      if (/متریال|واحد|قلم|خط آیتم|item|دسته/i.test(msg)) return 2;
-      if (/ترم|termsheet|پرداخت|پوشش/i.test(msg)) return 3;
-      if (/پروژه|project/i.test(msg)) return 4;
-      return 5;
-    };
 
     const name = supplierName.trim();
     let supplierId = "";
@@ -244,10 +289,11 @@ export function WizardPage() {
       if (!cat && !brand && qty == null && price == null) continue;
 
       const wantName = (cat || brand || specs.join(" ") || "").trim() || "کالای جدید";
-      let material = materials.find((m) => normalize(m.name) === normalize(wantName));
+      let material = materials.find((m) => looksLikeUuid(m.id) && normalize(m.name) === normalize(wantName));
       if (!material) {
         material = materials.find(
           (m) =>
+            looksLikeUuid(m.id) &&
             normalize(m.category) === normalize(cat) &&
             normalize(m.brand) === normalize(brand) &&
             specsKey(m.specs) === specsKey(specs),
@@ -257,11 +303,11 @@ export function WizardPage() {
       // تطبیق دوم بر اساس category/brand/specs انجام می‌شود تا آن‌ها هم پیدا شوند.
       if (!material && cat) {
         material = materials.find(
-          (m) => normalize(m.category) === normalize(cat) && normalize(m.brand) === normalize(brand),
+          (m) => looksLikeUuid(m.id) && normalize(m.category) === normalize(cat) && normalize(m.brand) === normalize(brand),
         );
       }
       let materialId: string;
-      if (material) {
+      if (material && looksLikeUuid(material.id)) {
         materialId = material.id;
       } else {
         try {
@@ -272,7 +318,7 @@ export function WizardPage() {
             category: cat,
             brand,
             specs,
-            base_unit: unit,
+            base_unit: unit || "عدد",
           });
           materialId = created.id;
         } catch (err) {
@@ -361,8 +407,8 @@ export function WizardPage() {
       toast.success("پیشنهاد ذخیره شد.");
       navigate("/");
     } catch (e) {
-      const msg = e instanceof Error ? e.message : "خطا در ذخیره پیشنهاد";
-      sectionError(guessStep(msg), "خطا در ثبت پیشنهاد", e);
+      const target = resolveErrorTarget(e);
+      sectionError(target, "خطا در ثبت پیشنهاد", e);
     }
   };
 
@@ -392,7 +438,7 @@ export function WizardPage() {
         <Stepper current={currentStep} highestVisited={highestVisited} completedSteps={completedSteps} onGoto={goToStep} />
 
         {currentStep === 1 && (
-          <div className="rounded-xl border border-line bg-panel p-5 shadow-sm">
+          <div data-step="1" className="rounded-xl border border-line bg-panel p-5 shadow-sm">
             <Step1TopicSupplier
               selectedTopic={selectedTopic}
               onTopicSelect={(t) => {
@@ -416,12 +462,12 @@ export function WizardPage() {
           </div>
         )}
         {currentStep === 2 && (
-          <div className="rounded-xl border border-line bg-panel p-5 shadow-sm">
+          <div data-step="2" className="rounded-xl border border-line bg-panel p-5 shadow-sm">
             <Step2LineItems items={items} onItemsChange={setItems} selectedTopic={selectedTopic} onRemember={rememberMaterial} />
           </div>
         )}
         {currentStep === 3 && (
-          <div className="rounded-xl border border-line bg-panel p-5 shadow-sm">
+          <div data-step="3" className="rounded-xl border border-line bg-panel p-5 shadow-sm">
             <Step3Termsheets
               cards={cards}
               onCardsChange={setCards}
@@ -432,7 +478,7 @@ export function WizardPage() {
           </div>
         )}
         {currentStep === 4 && (
-          <div className="rounded-xl border border-line bg-panel p-5 shadow-sm">
+          <div data-step="4" className="rounded-xl border border-line bg-panel p-5 shadow-sm">
             <Step4Projects
               items={items}
               projects={projectNames}
@@ -446,7 +492,7 @@ export function WizardPage() {
           </div>
         )}
         {currentStep === 5 && (
-          <div className="rounded-xl border border-line bg-panel p-5 shadow-sm">
+          <div data-step="5" className="rounded-xl border border-line bg-panel p-5 shadow-sm">
             <Step5Review
               quoteDate={quoteDate}
               onQuoteDate={setQuoteDate}