diff --git a/skills-lock.json b/skills-lock.json
index f2f84b5..d3c1bc0 100644
--- a/skills-lock.json
+++ b/skills-lock.json
@@ -1,18 +1,36 @@
 {
   "version": 1,
   "skills": {
+    "frontend-design": {
+      "source": "anthropics/skills",
+      "sourceType": "github",
+      "skillPath": "skills/frontend-design/SKILL.md",
+      "computedHash": "063a0e6448123cd359ad0044cc46b0e490cc7964d45ef4bb9fd842bd2ffbca67"
+    },
     "grill-me": {
       "source": "mattpocock/skills",
       "sourceType": "github",
       "skillPath": "skills/productivity/grill-me/SKILL.md",
       "computedHash": "784f0dbb7403b0f00324bce9a112f715342777a0daee7bbb7385f9c6f0a170ea"
     },
+    "improve-codebase-architecture": {
+      "source": "mattpocock/skills",
+      "sourceType": "github",
+      "skillPath": "skills/engineering/improve-codebase-architecture/SKILL.md",
+      "computedHash": "ef32aea0a8fab9b365ff9e08a95f8d353e20ca21ea46ec2e73587c86dd341351"
+    },
     "pptx": {
       "source": "anthropics/skills",
       "sourceType": "github",
       "skillPath": "skills/pptx/SKILL.md",
       "computedHash": "6b8b859d26f93aa059c9870d1ab76b44ab69e3d6757ce4a03cc94cb760888073"
     },
+    "shadcn": {
+      "source": "shadcn/ui",
+      "sourceType": "github",
+      "skillPath": "skills/shadcn/SKILL.md",
+      "computedHash": "80a6226e78f6d1fe464214ae0ef449d49d8ffaa3e7704f011e9b418c678ad4d1"
+    },
     "supabase": {
       "source": "supabase/agent-skills",
       "sourceType": "github",
diff --git a/src/hooks/useSkillLevels.js b/src/hooks/useSkillLevels.js
index 846aa3c..558dfee 100644
--- a/src/hooks/useSkillLevels.js
+++ b/src/hooks/useSkillLevels.js
@@ -1,5 +1,6 @@
 import { useEffect, useState, useCallback, useRef } from 'react'
 import { supabase } from '@/lib/supabase'
+import { toast } from 'sonner'
 
 export function useSkillLevels() {
   const [levels, setLevels] = useState({})
@@ -40,19 +41,22 @@ export function useSkillLevels() {
     const oldLevel = existing?.level
 
     if (existing) {
-      await supabase.from('skill_levels').update({ level: newLevel }).eq('id', existing.id)
+      const { error } = await supabase.from('skill_levels').update({ level: newLevel }).eq('id', existing.id)
+      if (error) { toast.error(error.message); return }
     } else {
-      await supabase.from('skill_levels').insert({ member_id: memberId, skill_id: skillId, level: newLevel })
+      const { error } = await supabase.from('skill_levels').insert({ member_id: memberId, skill_id: skillId, level: newLevel })
+      if (error) { toast.error(error.message); return }
     }
 
     if (oldLevel !== newLevel && changedBy) {
-      await supabase.from('skill_history').insert({
+      const { error } = await supabase.from('skill_history').insert({
         member_id: memberId,
         skill_id: skillId,
         old_level: oldLevel || null,
         new_level: newLevel,
         changed_by: changedBy,
       })
+      if (error) { toast.error(error.message); return }
     }
 
     await fetch()
diff --git a/src/pages/AcceptInvite.jsx b/src/pages/AcceptInvite.jsx
index 93ee289..c873fc7 100644
--- a/src/pages/AcceptInvite.jsx
+++ b/src/pages/AcceptInvite.jsx
@@ -58,6 +58,8 @@ export function AcceptInvite() {
     }
 
     await supabase.from('invitations').update({ accepted: true }).eq('token', token)
+      .then()
+      .catch(() => {})
 
     toast.success('Compte créé ! Vous pouvez vous connecter.')
     navigate('/login')
diff --git a/src/pages/Members.jsx b/src/pages/Members.jsx
index 8e0fa72..997242d 100644
--- a/src/pages/Members.jsx
+++ b/src/pages/Members.jsx
@@ -25,7 +25,8 @@ export function Members() {
   }
 
   async function updateMember() {
-    await supabase.from('members').update({ full_name: editName }).eq('id', editMember.id)
+    const { error } = await supabase.from('members').update({ full_name: editName }).eq('id', editMember.id)
+    if (error) { toast.error(error.message); return }
     setEditMember(null)
     load()
     toast.success('Membre mis à jour')
@@ -33,7 +34,8 @@ export function Members() {
 
   async function deleteMember(id) {
     if (!confirm('Supprimer ce membre ?')) return
-    await supabase.from('members').delete().eq('id', id)
+    const { error } = await supabase.from('members').delete().eq('id', id)
+    if (error) { toast.error(error.message); return }
     load()
     toast.success('Membre supprimé')
   }
diff --git a/src/pages/Skills.jsx b/src/pages/Skills.jsx
index e09c5fb..5677bba 100644
--- a/src/pages/Skills.jsx
+++ b/src/pages/Skills.jsx
@@ -22,9 +22,11 @@ export function Skills() {
 
   async function saveCategory() {
     if (editCat) {
-      await supabase.from('categories').update({ name: newCatName, color: newCatColor }).eq('id', editCat)
+      const { error } = await supabase.from('categories').update({ name: newCatName, color: newCatColor }).eq('id', editCat)
+      if (error) { toast.error(error.message); return }
     } else {
-      await supabase.from('categories').insert({ name: newCatName, color: newCatColor })
+      const { error } = await supabase.from('categories').insert({ name: newCatName, color: newCatColor })
+      if (error) { toast.error(error.message); return }
     }
     setCatDialogOpen(false)
     setEditCat(null)
@@ -40,7 +42,8 @@ export function Skills() {
   }
 
   async function saveSkill() {
-    await supabase.from('skills').insert({ name: newSkill.name, category_id: newSkill.category_id })
+    const { error } = await supabase.from('skills').insert({ name: newSkill.name, category_id: newSkill.category_id })
+    if (error) { toast.error(error.message); return }
     setSkillDialogOpen(false)
     setNewSkill({ name: '', category_id: '' })
     refetchSkills()