fix: improve error handling in API routes and update date handling for OKR and Key Result submissions

src/app/teams/[id]/okrs/[okrId]/edit/page.tsx

@@ -54,7 +54,23 @@ export default function EditOKRPage() {
       });
   }, [okrId, teamId]);
 
-  const handleSubmit = async (data: CreateOKRInput & { keyResultsUpdates?: { create?: any[]; update?: any[]; delete?: string[] } }) => {
+  type KeyResultUpdate = {
+    id: string;
+    title?: string;
+    targetValue?: number;
+    unit?: string;
+    order?: number;
+  };
+
+  const handleSubmit = async (data: CreateOKRInput & { 
+    startDate: Date | string;
+    endDate: Date | string;
+    keyResultsUpdates?: { 
+      create?: Array<{ title: string; targetValue: number; unit: string; order: number }>; 
+      update?: KeyResultUpdate[]; 
+      delete?: string[] 
+    } 
+  }) => {
     // Convert to UpdateOKRInput format
     const updateData = {
       objective: data.objective,
@@ -64,7 +80,18 @@ export default function EditOKRPage() {
       endDate: typeof data.endDate === 'string' ? new Date(data.endDate) : data.endDate,
     };
 
-    const payload: any = {
+    const payload: {
+      objective: string;
+      description?: string;
+      period: string;
+      startDate: string;
+      endDate: string;
+      keyResultsUpdates?: {
+        create?: Array<{ title: string; targetValue: number; unit: string; order: number }>;
+        update?: KeyResultUpdate[];
+        delete?: string[];
+      };
+    } = {
       ...updateData,
       startDate: updateData.startDate.toISOString(),
       endDate: updateData.endDate.toISOString(),
@@ -83,7 +110,7 @@ export default function EditOKRPage() {
 
     if (!response.ok) {
       const error = await response.json();
-      throw new Error(error.error || 'Erreur lors de la mise à jour de l\'OKR');
+      throw new Error(error.error || 'Erreur lors de la mise à jour de l&apos;OKR');
     }
 
     router.push(`/teams/${teamId}/okrs/${okrId}`);
@@ -121,12 +148,12 @@ export default function EditOKRPage() {
     <main className="mx-auto max-w-4xl px-4 py-8">
       <div className="mb-6">
         <Link href={`/teams/${teamId}/okrs/${okrId}`} className="text-muted hover:text-foreground">
-          ← Retour à l'OKR
+          ← Retour à l&apos;OKR
         </Link>
       </div>
 
       <Card className="p-6">
-        <h1 className="text-2xl font-bold text-foreground mb-6">Modifier l'OKR</h1>
+        <h1 className="text-2xl font-bold text-foreground mb-6">Modifier l&apos;OKR</h1>
         <OKRForm
           teamMembers={teamMembers}
           onSubmit={handleSubmit}

src/app/teams/[id]/okrs/[okrId]/page.tsx

@@ -148,7 +148,7 @@ export default function OKRDetailPage() {
     <main className="mx-auto max-w-4xl px-4 py-8">
       <div className="mb-6">
         <Link href={`/teams/${teamId}`} className="text-muted hover:text-foreground">
-          ← Retour à l'équipe
+          ← Retour à l&apos;équipe
         </Link>
       </div>
 

src/app/teams/[id]/okrs/new/page.tsx

@@ -45,7 +45,7 @@ export default function NewOKRPage() {
 
     if (!response.ok) {
       const error = await response.json();
-      throw new Error(error.error || 'Erreur lors de la création de l\'OKR');
+      throw new Error(error.error || 'Erreur lors de la création de l'OKR');
     }
 
     router.push(`/teams/${teamId}`);
@@ -64,7 +64,7 @@ export default function NewOKRPage() {
     <main className="mx-auto max-w-4xl px-4 py-8">
       <div className="mb-6">
         <Link href={`/teams/${teamId}`} className="text-muted hover:text-foreground">
-          ← Retour à l'équipe
+          ← Retour à l&apos;équipe
         </Link>
       </div>