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).

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>