fix(post-image-designer): pass opts to _pidDrawTextWrapped so text renders on bg

The v19 'remove blur band behind text' change made _pidDrawTextWrapped read
opts._deepBand, but opts was not a parameter of that function. Under
'use strict' this raised a ReferenceError that was swallowed by the
try/catch in _pidRenderSlide, so only the background drew and the text
never appeared on the ảnh nền.

Fix: add opts as the 9th param and pass it at all 8 call sites. Bumped
cache-buster in index_v2.html.

README.md

@@ -13,6 +13,16 @@ tags:
 
 **v19 - AI ảnh nền SenseNova-U1.5 + text overlay overhaul**
 
+## 🔧 Hotfix (2026-09-07) — chữ không hiện trên ảnh nền
+
+"🖼️ Tạo Ảnh Bài Viết" modal: khi tính fi "High contrast, no blur" (loái bỏ nền
+mờ/foggy band) đã giới thiệu, text overlay silently sp qué không vẽ — only the
+background image rendered and the chữ disappeared. Root cause:
+`_pidDrawTextWrapped` referenced `opts._deepBand` but `opts` was NOT a parameter
+of that function (under `'use strict'` this raised a ReferenceError that was
+swallowed by the try/catch in `_pidRenderSlide`). Fix: pass `opts` as the last
+argument through all 8 call sites.
+
 ## 🔧 Changes in v19 (2026-09-06)
 - **AI ảnh nền**: upgraded to **SenseNova-U1.5-8B-MoT** (same model family as
   the official `hugging-apps/sensenova-sensenova-u1-5-8b-mot` demo) with the

static/index_v2.html

@@ -89,7 +89,7 @@ var SPACE=location.origin;
 </script>
 <script src="/static/app_v2.js?v=20260903livefootball"></script>
 <script src="/static/designer_v2.js?v=20260907fix2"></script>
-<script src="/static/post_image_designer.js?v=20260907pidfix4"></script>
+<script src="/static/post_image_designer.js?v=20260907pidfix5"></script>
 <script src="/static/yt_live.js"></script>
 <script src="/static/vtv_init.js"></script>
 <script src="/static/hot_multi.js?v=1"></script>

static/post_image_designer.js

@@ -265,7 +265,7 @@ function _pidFontScale(){
  * High-contrast, crisp: solid clean band + black outline + optional glow.
  * Returns the y position after the last drawn line.
  */
-function _pidDrawTextWrapped(ctx, W, H, text, pos, color, glow, baseScale, maxLines){
+function _pidDrawTextWrapped(ctx, W, H, text, pos, color, glow, baseScale, maxLines, opts){
   if(!text || !text.trim()) return 0;
   var fs = Math.max(20, Math.round(W * baseScale));
   fs = Math.min(fs, Math.round(W * 0.095));
@@ -304,7 +304,7 @@ function _pidDrawTextWrapped(ctx, W, H, text, pos, color, glow, baseScale, maxLi
   /* --- legibility without a black band: strong outline + optional glow.
        The background image stays visible — only the text gets contrast.
        A crisp band is drawn ONLY for the explicit 'blur' layout choice. --- */
-  var band = opts._deepBand || false;   // set by _pidDrawText via layout===blur/split
+  var band = (opts && opts._deepBand) || false;   // set by _pidDrawText via layout===blur/split
   if(band){
     var bx = Math.round(W * 0.02);
     var bw = W - 2 * bx;
@@ -352,19 +352,19 @@ function _pidDrawText(ctx, W, H, opts){
   if(!overlay && !text) return;
   if(overlay && text){
     if(opts.pos === 'top'){
-      _pidDrawTextWrapped(ctx, W, H, overlay, 0.05, opts.color, opts.glow, fScale, 4);
-      _pidDrawTextWrapped(ctx, W, H, text, 0.44, opts.color, opts.glow, fScale * 0.8, 3);
+      _pidDrawTextWrapped(ctx, W, H, overlay, 0.05, opts.color, opts.glow, fScale, 4, opts);
+      _pidDrawTextWrapped(ctx, W, H, text, 0.44, opts.color, opts.glow, fScale * 0.8, 3, opts);
     } else if(opts.pos === 'bottom'){
-      _pidDrawTextWrapped(ctx, W, H, text, 0.38, opts.color, opts.glow, fScale * 0.8, 3);
-      _pidDrawTextWrapped(ctx, W, H, overlay, 0.76, opts.color, opts.glow, fScale, 4);
+      _pidDrawTextWrapped(ctx, W, H, text, 0.38, opts.color, opts.glow, fScale * 0.8, 3, opts);
+      _pidDrawTextWrapped(ctx, W, H, overlay, 0.76, opts.color, opts.glow, fScale, 4, opts);
     } else {
-      _pidDrawTextWrapped(ctx, W, H, overlay, 0.46, opts.color, opts.glow, fScale, 4);
-      _pidDrawTextWrapped(ctx, W, H, text, 0.72, opts.color, opts.glow, fScale * 0.78, 3);
+      _pidDrawTextWrapped(ctx, W, H, overlay, 0.46, opts.color, opts.glow, fScale, 4, opts);
+      _pidDrawTextWrapped(ctx, W, H, text, 0.72, opts.color, opts.glow, fScale * 0.78, 3, opts);
     }
   } else if(overlay){
-    _pidDrawTextWrapped(ctx, W, H, overlay, opts.pos, opts.color, opts.glow, fScale, 6);
+    _pidDrawTextWrapped(ctx, W, H, overlay, opts.pos, opts.color, opts.glow, fScale, 6, opts);
   } else {
-    _pidDrawTextWrapped(ctx, W, H, text, opts.pos, opts.color, opts.glow, fScale, 5);
+    _pidDrawTextWrapped(ctx, W, H, text, opts.pos, opts.color, opts.glow, fScale, 5, opts);
   }
 }