diff --git a/custom_components/bahmcloud_store/panel/panel.js b/custom_components/bahmcloud_store/panel/panel.js
index c2100ab..d24ebb6 100644
--- a/custom_components/bahmcloud_store/panel/panel.js
+++ b/custom_components/bahmcloud_store/panel/panel.js
@@ -21,9 +21,9 @@ class BahmcloudStorePanel extends HTMLElement {
     this._detailRepo = null;
 
     this._readmeLoading = false;
-    this._readmeText = null;
-    this._readmeHtml = null;
-    this._readmeError = null;
+    this._readmeText = null; // markdown string
+    this._readmeHtml = null; // sanitized html string
+    this._readmeError = null; // string
   }
 
   set hass(hass) {
@@ -46,7 +46,7 @@ class BahmcloudStorePanel extends HTMLElement {
       const data = await this._hass.callApi("get", "bcs");
       this._data = data;
     } catch (e) {
-      this._error = e?.message ? String(e.message) : String(e);
+      this._error = this._toErrString(e);
     } finally {
       this._loading = false;
       this._update();
@@ -106,7 +106,7 @@ class BahmcloudStorePanel extends HTMLElement {
       this._view = "manage";
       this._update();
     } catch (e) {
-      this._error = e?.message ? String(e.message) : String(e);
+      this._error = this._toErrString(e);
       this._update();
     }
   }
@@ -120,7 +120,7 @@ class BahmcloudStorePanel extends HTMLElement {
       this._view = "manage";
       this._update();
     } catch (e) {
-      this._error = e?.message ? String(e.message) : String(e);
+      this._error = this._toErrString(e);
       this._update();
     }
   }
@@ -142,9 +142,13 @@ class BahmcloudStorePanel extends HTMLElement {
     this._loadReadme(repoId);
   }
 
+  // --- README fetching (hardened) ---
   async _loadReadme(repoId) {
     if (!this._hass) return;
+
     this._readmeLoading = true;
+    this._readmeText = null;
+    this._readmeHtml = null;
     this._readmeError = null;
     this._update();
 
@@ -154,18 +158,37 @@ class BahmcloudStorePanel extends HTMLElement {
         `bcs/readme?repo_id=${encodeURIComponent(repoId)}`
       );
 
-      if (resp?.ok && typeof resp.readme === "string" && resp.readme.trim()) {
-        this._readmeText = resp.readme;
-        this._readmeHtml = typeof resp.html === "string" && resp.html.trim() ? resp.html : null;
+      // Normalize fields strictly (avoid [object Object])
+      const ok = resp && resp.ok === true;
+
+      const readme = (resp && typeof resp.readme === "string") ? resp.readme : null;
+      const html = (resp && typeof resp.html === "string") ? resp.html : null;
+
+      if (ok && readme && readme.trim()) {
+        this._readmeText = readme;
+        this._readmeHtml = html && html.trim() ? html : null;
+        this._readmeError = null;
       } else {
+        // If backend provided a message, convert it safely
+        const msg =
+          (resp && typeof resp.message === "string" && resp.message.trim())
+            ? resp.message.trim()
+            : "README not found.";
+
+        // Extra hint if backend returned unexpected types
+        if (ok && resp && resp.readme && typeof resp.readme !== "string") {
+          this._readmeError = "README has an unsupported format (expected text).";
+        } else {
+          this._readmeError = msg;
+        }
+
         this._readmeText = null;
         this._readmeHtml = null;
-        this._readmeError = this._safeText(resp?.message) || "README not found.";
       }
     } catch (e) {
       this._readmeText = null;
       this._readmeHtml = null;
-      this._readmeError = e?.message ? String(e.message) : String(e);
+      this._readmeError = this._toErrString(e) || "README not found.";
     } finally {
       this._readmeLoading = false;
       this._update();
@@ -544,10 +567,10 @@ class BahmcloudStorePanel extends HTMLElement {
 
         const creator = this._safeText(r?.owner) ? `Creator: ${this._safeText(r?.owner)}` : "Creator: -";
         const latest = this._safeText(r?.latest_version) ? `Latest: ${this._safeText(r?.latest_version)}` : "Latest: unknown";
-        const cat = this._safeText(r?.category) ? `Category: ${this._safeText(r?.category)}` : null;
+        const prov = this._safeText(r?.provider) ? `Provider: ${this._safeText(r?.provider)}` : null;
         const metaSrc = this._safeText(r?.meta_source) ? `Meta: ${this._safeText(r?.meta_source)}` : null;
 
-        const lineBits = [creator, latest, cat, metaSrc].filter(Boolean);
+        const lineBits = [creator, latest, prov, metaSrc].filter(Boolean);
 
         return `
           <div class="card clickable" data-repo="${this._esc(id)}">
@@ -652,7 +675,6 @@ class BahmcloudStorePanel extends HTMLElement {
 
     for (const r of repos) {
       s.total += 1;
-
       if (r?.source === "custom") s.custom += 1;
 
       const p = this._safeLower(r?.provider) || "other";
@@ -683,9 +705,6 @@ class BahmcloudStorePanel extends HTMLElement {
       this._safeText(r?.owner) ? `Creator: ${this._safeText(r?.owner)}` : "Creator: -",
       latest,
       this._safeText(r?.provider) ? `Provider: ${this._safeText(r?.provider)}` : null,
-      this._safeText(r?.category) ? `Category: ${this._safeText(r?.category)}` : null,
-      this._safeText(r?.meta_author) ? `Author: ${this._safeText(r?.meta_author)}` : null,
-      this._safeText(r?.meta_maintainer) ? `Maintainer: ${this._safeText(r?.meta_maintainer)}` : null,
       this._safeText(r?.meta_source) ? `Meta: ${this._safeText(r?.meta_source)}` : null,
     ].filter(Boolean);
 
@@ -758,8 +777,8 @@ class BahmcloudStorePanel extends HTMLElement {
     if (!mount) return;
 
     if (this._readmeText) {
-      // Client renderer may be unavailable; prefer server-provided HTML
-      if (this._readmeHtml) {
+      // We render server-side; only accept a real string html
+      if (typeof this._readmeHtml === "string" && this._readmeHtml.trim()) {
         mount.innerHTML = this._readmeHtml;
         this._postprocessRenderedMarkdown(mount);
         return;
@@ -914,13 +933,13 @@ class BahmcloudStorePanel extends HTMLElement {
     return Array.from(set).sort();
   }
 
-  // --- HARDENING HELPERS (fixes [object Object]) ---
+  // --- helpers (prevent [object Object]) ---
   _safeText(v) {
     if (v === null || v === undefined) return "";
     const t = typeof v;
     if (t === "string") return v;
     if (t === "number" || t === "boolean") return String(v);
-    return ""; // objects/arrays/functions => empty (prevents [object Object])
+    return "";
   }
 
   _safeLower(v) {
@@ -929,8 +948,18 @@ class BahmcloudStorePanel extends HTMLElement {
   }
 
   _safeId(v) {
-    const s = this._safeText(v);
-    return s || "";
+    return this._safeText(v) || "";
+  }
+
+  _toErrString(e) {
+    if (!e) return "Unknown error";
+    if (typeof e === "string") return e;
+    if (typeof e?.message === "string") return e.message;
+    try {
+      return JSON.stringify(e);
+    } catch (_) {
+      return "Unknown error";
+    }
   }
 
   _esc(s) {