fix: guard Icon src against non-function values to prevent crash

Add defensive check in folds Icon component so that if src is ever
undefined or non-function (root cause unknown, possibly data-dependent),
the SVG renders empty rather than throwing and crashing the whole app.

Also adds postinstall script to re-apply the patch after npm install.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "lotus-chat",
   "version": "4.12.1-lotus",
-  "description": "Lotus Chat — Matrix client for Lotus Guild",
+  "description": "Lotus Chat \u2014 Matrix client for Lotus Guild",
   "main": "index.js",
   "type": "module",
   "engines": {
@@ -18,7 +18,8 @@
     "typecheck": "tsc --noEmit",
     "prepare": "husky install",
     "commit": "git-cz",
-    "semantic-release": "semantic-release"
+    "semantic-release": "semantic-release",
+    "postinstall": "node scripts/patch-folds.mjs"
   },
   "lint-staged": {
     "*.{ts,tsx,js,jsx}": "eslint",

scripts/patch-folds.mjs

@@ -0,0 +1,26 @@
+import { readFileSync, writeFileSync } from 'fs';
+import { fileURLToPath } from 'url';
+import { join, dirname } from 'path';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const foldsPath = join(__dirname, '../node_modules/folds/dist/index.js');
+
+try {
+  let content = readFileSync(foldsPath, 'utf8');
+  
+  // Defensive guard: if src is not a function, render null instead of crashing
+  const original = 'children: src(filled)';
+  const patched = 'children: typeof src === "function" ? src(filled) : null';
+  
+  if (content.includes(patched)) {
+    console.log('folds patch already applied.');
+  } else if (content.includes(original)) {
+    content = content.replace(original, patched);
+    writeFileSync(foldsPath, content, 'utf8');
+    console.log('Applied defensive Icon src guard to folds.');
+  } else {
+    console.warn('Warning: folds Icon patch target not found - may need updating.');
+  }
+} catch (e) {
+  console.warn('Warning: Could not patch folds:', e.message);
+}