feat: merge UI vault settings with environment config, improve French UI text clarity, and enhance hidden files whitelist styling with hover effects and empty state

frontend/style.css

@@ -3414,61 +3414,85 @@ body.resizing-v {
 .hidden-files-vault-card {
   background: var(--bg-secondary);
   border: 1px solid var(--border);
-  border-radius: 8px;
-  padding: 16px;
-  margin-bottom: 16px;
+  border-radius: 6px;
+  padding: 12px;
+  margin-bottom: 12px;
+  transition: border-color 200ms ease;
+}
+
+.hidden-files-vault-card:hover {
+  border-color: var(--accent);
 }
 
 .hidden-files-vault-header {
   display: flex;
   align-items: center;
   justify-content: space-between;
-  margin-bottom: 16px;
-  padding-bottom: 12px;
+  margin-bottom: 12px;
+  padding-bottom: 8px;
   border-bottom: 1px solid var(--border);
 }
 
 .hidden-files-vault-header h3 {
-  font-size: 1rem;
+  font-size: 0.95rem;
   font-weight: 600;
   color: var(--text-primary);
   margin: 0;
 }
 
 .hidden-files-vault-type {
-  font-size: 0.75rem;
-  padding: 2px 8px;
+  font-size: 0.7rem;
+  padding: 2px 6px;
   background: var(--tag-bg);
   color: var(--tag-text);
-  border-radius: 4px;
+  border-radius: 3px;
   font-family: var(--mono);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
 }
 
 .hidden-files-whitelist {
-  margin-top: 16px;
-  padding-top: 16px;
+  margin-top: 12px;
+  padding-top: 12px;
   border-top: 1px solid var(--border);
 }
 
 .hidden-files-whitelist-items {
   display: flex;
   flex-wrap: wrap;
-  gap: 8px;
-  margin-bottom: 12px;
-  min-height: 32px;
+  gap: 6px;
+  margin-bottom: 10px;
+  min-height: 28px;
+  padding: 4px;
+  background: var(--bg-primary);
+  border-radius: 4px;
+  border: 1px dashed var(--border);
+}
+
+.hidden-files-whitelist-items:empty::before {
+  content: "Aucun dossier dans la liste blanche";
+  color: var(--text-muted);
+  font-size: 0.85rem;
+  font-style: italic;
 }
 
 .hidden-files-whitelist-item {
   display: inline-flex;
   align-items: center;
-  gap: 6px;
-  padding: 4px 8px 4px 12px;
+  gap: 4px;
+  padding: 3px 6px 3px 8px;
   background: var(--tag-bg);
   color: var(--tag-text);
-  border-radius: 6px;
-  font-size: 0.875rem;
+  border-radius: 4px;
+  font-size: 0.85rem;
   font-family: var(--mono);
   border: 1px solid color-mix(in srgb, var(--tag-text) 30%, transparent);
+  transition: all 150ms ease;
+}
+
+.hidden-files-whitelist-item:hover {
+  background: color-mix(in srgb, var(--tag-bg) 80%, var(--accent) 20%);
+  border-color: var(--accent);
 }
 
 .whitelist-item-text {
@@ -3480,25 +3504,52 @@ body.resizing-v {
   border: none;
   color: var(--text-muted);
   cursor: pointer;
-  font-size: 1.2rem;
+  font-size: 1.1rem;
   line-height: 1;
-  padding: 0 4px;
-  transition: color 150ms ease;
+  padding: 0 2px;
+  transition: all 150ms ease;
+  border-radius: 2px;
 }
 
 .whitelist-item-remove:hover {
   color: var(--danger);
+  background: color-mix(in srgb, var(--danger) 15%, transparent);
 }
 
 .hidden-files-add-row {
   display: flex;
   gap: 8px;
   align-items: center;
+  margin-top: 4px;
 }
 
 .hidden-files-add-row .config-input {
   flex: 1;
-  max-width: 300px;
+  max-width: 250px;
+  font-family: var(--mono);
+  font-size: 0.9rem;
+}
+
+.config-btn-add {
+  padding: 6px 12px;
+  background: var(--accent);
+  color: white;
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+  font-size: 0.875rem;
+  font-weight: 500;
+  transition: all 150ms ease;
+  white-space: nowrap;
+}
+
+.config-btn-add:hover {
+  background: color-mix(in srgb, var(--accent) 85%, black);
+  transform: translateY(-1px);
+}
+
+.config-btn-add:active {
+  transform: translateY(0);
 }
 
 /* ---------------------------------------------------------------------------