diff --git a/backend/main.py b/backend/main.py
index 70b49ef..85b1b96 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -4022,6 +4022,25 @@ async def api_set_ai_keys(body: dict = Body(...), current_user=Depends(require_a
     logger.info("AI keys updated")
     return {"status": "ok"}
 
+
+@app.delete("/api/config/ai-keys/{provider_env}")
+async def api_delete_ai_key(provider_env: str, current_user=Depends(require_admin)):
+    """Delete a specific AI provider key from storage."""
+    allowed = {"DEEPSEEK_API_KEY", "OPENROUTER_API_KEY", "GEMINI_API_KEY",
+               "NVIDIA_API_KEY", "QWENCLOUD_API_KEY", "XIAOMI_API_KEY", "MISTRAL_API_KEY"}
+    key_name = provider_env.upper()
+    if key_name not in allowed:
+        raise HTTPException(status_code=400, detail=f"Clé inconnue: {provider_env}")
+    keys = _read_ai_keys()
+    if key_name in keys:
+        del keys[key_name]
+        _write_ai_keys(keys)
+    # Also clear from env at runtime so get_ai_key() no longer finds it
+    os.environ.pop(key_name, None)
+    logger.info(f"AI key deleted: {key_name}")
+    return {"status": "deleted", "key": key_name}
+
+
 @app.post("/api/config/ai-keys/test")
 async def api_test_ai_keys(current_user=Depends(require_admin)):
     """Test which AI providers are configured.
diff --git a/frontend/js/config.js b/frontend/js/config.js
index 27ba6a6..9221836 100644
--- a/frontend/js/config.js
+++ b/frontend/js/config.js
@@ -1340,21 +1340,77 @@ function updateRegexPreview() {
 
 
 // ── AI Keys management ──
+const AI_KEY_MAP = {
+  "cfg-deepseek-key": "DEEPSEEK_API_KEY",
+  "cfg-openrouter-key": "OPENROUTER_API_KEY",
+  "cfg-gemini-key": "GEMINI_API_KEY",
+  "cfg-nvidia-key": "NVIDIA_API_KEY",
+  "cfg-qwencloud-key": "QWENCLOUD_API_KEY",
+  "cfg-xiaomi-key": "XIAOMI_API_KEY",
+  "cfg-mistral-key": "MISTRAL_API_KEY",
+};
+const AI_PROVIDER_NAMES = ["deepseek","openrouter","gemini","nvidia","qwencloud","xiaomi","mistral"];
+
+function _ensureAIKeyUI() {
+  for (const [inputId] of Object.entries(AI_KEY_MAP)) {
+    const input = document.getElementById(inputId);
+    if (!input) continue;
+    const row = input.closest(".config-row");
+    if (!row || row.dataset.enhanced) continue;
+    row.dataset.enhanced = "1";
+    row.style.cssText += "display:flex;align-items:center;gap:8px;flex-wrap:wrap;";
+    const badge = document.createElement("span");
+    badge.id = inputId.replace("-key", "-badge");
+    badge.style.cssText = "font-size:11px;padding:2px 8px;border-radius:10px;white-space:nowrap;";
+    row.appendChild(badge);
+    const delBtn = document.createElement("button");
+    delBtn.type = "button";
+    delBtn.id = inputId.replace("-key", "-delete");
+    delBtn.className = "config-btn-secondary";
+    delBtn.style.cssText = "font-size:11px;padding:4px 10px;color:var(--danger,#e74c3c);border-color:var(--danger,#e74c3c);cursor:pointer;display:none;";
+    delBtn.textContent = "\u00d7 Supprimer";
+    delBtn.addEventListener("click", () => deleteAIKey(inputId));
+    row.appendChild(delBtn);
+  }
+}
+
+function _setAIKeyBadge(inputId, hasKey) {
+  const badge = document.getElementById(inputId.replace("-key", "-badge"));
+  const delBtn = document.getElementById(inputId.replace("-key", "-delete"));
+  if (badge) {
+    if (hasKey) {
+      badge.textContent = "\u2713 Configur\u00e9";
+      badge.style.background = "var(--success-bg, #27ae6022)";
+      badge.style.color = "var(--success, #27ae60)";
+      badge.style.border = "1px solid var(--success, #27ae60)";
+    } else {
+      badge.textContent = "Non configur\u00e9";
+      badge.style.background = "var(--muted-bg, #ffffff10)";
+      badge.style.color = "var(--text-muted, #888)";
+      badge.style.border = "1px solid var(--border, #444)";
+    }
+  }
+  if (delBtn) delBtn.style.display = hasKey ? "inline-block" : "none";
+}
+
 async function loadAIKeys() {
+  _ensureAIKeyUI();
   try {
     const data = await api("/api/config/ai-keys");
-    ["DEEPSEEK_API_KEY","OPENROUTER_API_KEY","GEMINI_API_KEY","NVIDIA_API_KEY","QWENCLOUD_API_KEY","XIAOMI_API_KEY","MISTRAL_API_KEY"].forEach(k => {
-      const id = "cfg-" + k.toLowerCase().replace(/_api_key/g, "") + "-key";
-      const input = document.getElementById(id);
-      if (input && data[k]) input.placeholder = data[k];
-    });
+    for (const [inputId, envName] of Object.entries(AI_KEY_MAP)) {
+      const input = document.getElementById(inputId);
+      const val = data[envName] || "";
+      if (input) {
+        input.placeholder = val || (inputId.includes("gemini") ? "AIza..." : inputId.includes("openrouter") ? "sk-or-..." : "sk-...");
+      }
+      _setAIKeyBadge(inputId, !!val);
+    }
   } catch(e) {}
 }
 
 async function saveAIKeys() {
   const keys = {};
-  const map = { "cfg-deepseek-key": "DEEPSEEK_API_KEY", "cfg-openrouter-key": "OPENROUTER_API_KEY", "cfg-gemini-key": "GEMINI_API_KEY", "cfg-nvidia-key": "NVIDIA_API_KEY", "cfg-qwencloud-key": "QWENCLOUD_API_KEY", "cfg-xiaomi-key": "XIAOMI_API_KEY", "cfg-mistral-key": "MISTRAL_API_KEY" };
-  for (const [id, name] of Object.entries(map)) {
+  for (const [id, name] of Object.entries(AI_KEY_MAP)) {
     const input = document.getElementById(id);
     if (input && input.value.trim()) keys[name] = input.value.trim();
   }
@@ -1362,8 +1418,19 @@ async function saveAIKeys() {
   try {
     await api("/api/config/ai-keys", { method: "POST", body: JSON.stringify(keys) });
     showToast(t("config.api_keys_saved"), "success");
-    // Clear inputs
-    Object.keys(map).forEach(id => { const el = document.getElementById(id); if (el) el.value = ""; });
+    Object.keys(AI_KEY_MAP).forEach(id => { const el = document.getElementById(id); if (el) el.value = ""; });
+    loadAIKeys();
+  } catch(e) { showToast("Erreur: " + e.message, "error"); }
+}
+
+async function deleteAIKey(inputId) {
+  const envName = AI_KEY_MAP[inputId];
+  if (!envName) return;
+  const provider = envName.replace("_API_KEY", "").replace(/_/g, " ");
+  if (!confirm("Supprimer la cl\u00e9 API " + provider + " ?\nLe fournisseur ne sera plus disponible.")) return;
+  try {
+    await api("/api/config/ai-keys/" + envName, { method: "DELETE" });
+    showToast("Cl\u00e9 " + provider + " supprim\u00e9e", "success");
     loadAIKeys();
   } catch(e) { showToast("Erreur: " + e.message, "error"); }
 }
@@ -1372,12 +1439,18 @@ async function testAIKeys() {
   const status = document.getElementById("cfg-ai-status");
   if (status) status.textContent = "Test en cours...";
   try {
-    // Test connectivity
     const results = await api("/api/config/ai-keys/test", { method: "POST" });
     var msg = Object.entries(results).map(([k,v]) => k + ": " + v).join(" | ");
     if (status) status.textContent = msg;
-    // Fetch models for configured providers
-    for (const p of ["deepseek","openrouter","gemini","nvidia","qwencloud","xiaomi","mistral"]) {
+    for (const p of AI_PROVIDER_NAMES) {
+      const inputId = "cfg-" + p + "-key";
+      if (results[p] === "ok") {
+        _setAIKeyBadge(inputId, true);
+      } else if (results[p] && results[p].includes("non")) {
+        _setAIKeyBadge(inputId, false);
+      }
+    }
+    for (const p of AI_PROVIDER_NAMES) {
       if (results[p] === "ok") {
         try {
           const m = await api("/api/config/ai-models?provider=" + p);
@@ -1394,7 +1467,7 @@ async function testAIKeys() {
   } catch(e) {
     if (status) status.textContent = "Erreur: " + e.message;
   }
-}
+}}
 
 
 export {