Extract cloud browser thumbnail helper

docs/modernization/debt.md

@@ -18,6 +18,13 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Recent Reductions
 
+- 2026-06-15: `DEBT-0038` was narrowed again. The retained cloud-browser
+  thumbnail fetch, decode, and texture-apply path in
+  `NodeDialogCloud::load_thumbs_thread()` now routes through a focused helper
+  in `src/node_dialog_cloud.cpp` instead of living inline in the retained
+  loader body; the remaining cloud bridge debt stays concentrated in retained
+  prompt/progress lifetime, OpenGL context guarding, and transfer-thread
+  execution.
 - 2026-06-15: `DEBT-0038` was narrowed again. The cloud-browser slot
   creation and selection wiring in `NodeDialogCloud::load_thumbs_thread()`
   now route through a focused helper in `src/node_dialog_cloud.*` instead of

docs/modernization/roadmap.md

@@ -124,6 +124,11 @@ The cloud-browser slot creation and selection wiring in
 helper in `src/node_dialog_cloud.*`, so the remaining cloud bridge debt is
 further concentrated on prompt/progress lifetime, OpenGL context guarding,
 `NodeDialogCloud` thumbnail execution, and transfer-thread execution.
+The retained cloud-browser thumbnail fetch, decode, and texture-apply path in
+`NodeDialogCloud::load_thumbs_thread()` now also routes through a focused
+helper in `src/node_dialog_cloud.cpp`, so the remaining cloud bridge debt is
+further concentrated on prompt/progress lifetime, OpenGL context guarding,
+and transfer-thread execution.
 
 Recent 2026-06-13 retained preview reductions continue to narrow DEBT-0036:
 `NodeStrokePreview::draw_stroke_immediate()` now also routes

docs/modernization/tasks.md

@@ -660,6 +660,42 @@ Completed Task Log:
 | --- | --- | ---: | --- | --- |
 | 2026-06-15 | ADP-016 | no score movement | `MSBuild.exe out\build\windows-msvc-default\panopainter_app.vcxproj /p:Configuration=Debug /p:Platform=x64`; `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_cloud" --output-on-failure` | `45f08ee8` |
 
+### ADP-017 - Extract Cloud Browser Thumbnail Helper
+
+Status: Done
+Score: no score movement
+Debt: `DEBT-0038`
+Scope: `src/node_dialog_cloud.cpp` only
+
+Goal:
+
+Reduce the inline retained cloud-browser loader surface in
+`NodeDialogCloud::load_thumbs_thread()` by extracting the per-item thumbnail
+fetch, decode, and texture-apply path into a focused helper while preserving
+current behavior.
+
+Done Checks:
+
+- The per-item thumbnail fetch/decode/apply path no longer lives inline in
+  `NodeDialogCloud::load_thumbs_thread()`.
+- The retained cloud-browser thumbnail path now routes through a focused
+  helper in `src/node_dialog_cloud.cpp`.
+- `DEBT-0038` and the roadmap note the reduced remaining cloud bridge
+  surface.
+
+Validation:
+
+```powershell
+& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\panopainter_app.vcxproj /p:Configuration=Debug /p:Platform=x64
+ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_cloud" --output-on-failure
+```
+
+Completed Task Log:
+
+| Date | Task | Score | Validation | Commit |
+| --- | --- | ---: | --- | --- |
+| 2026-06-15 | ADP-017 | no score movement | `MSBuild.exe out\build\windows-msvc-default\panopainter_app.vcxproj /p:Configuration=Debug /p:Platform=x64`; `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_cloud" --output-on-failure` | `(pending)` |
+
 Completed Task Log:
 
 | Date | Task | Score | Validation | Commit |

src/node_dialog_cloud.cpp

@@ -10,6 +10,41 @@
 #include "legacy_ui_overlay_services.h"
 #include "platform_api/network_tls_policy.h"
 
+namespace
+{
+bool load_cloud_thumb(CURL* curl, const std::string& name, NodeDialogCloudItem* node, std::string& response)
+{
+    response.clear();
+    char* url_escaped = curl_easy_escape(curl, name.c_str(), (int)name.size());
+    std::string url = std::string("https://panopainter.com/cloud/cloud-info.php?file=") + url_escaped;
+    delete url_escaped;
+    curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+    LOG("%s", url.c_str());
+    auto err = curl_easy_perform(curl);
+    if (err != CURLE_OK)
+        return false; // TODO: handle this error with a message or something
+
+    auto info = split(response, ',', 3);
+    int width = atoi(info[0].c_str());
+    int height = atoi(info[1].c_str());
+    int comp = atoi(info[2].c_str());
+    assert(comp == 4);
+    std::string rgb;
+    rgb.resize(Base64::DecodedLength(info[3]));
+    Base64::Decode(info[3], &rgb);
+    Image thumb;
+    thumb.create(width, height);
+    thumb.copy_from((uint8_t*)rgb.data());
+
+    auto image_tex = node->find<NodeImageTexture>("thumb-tex");
+    image_tex->tex = std::make_shared<Texture2D>();
+    image_tex->tex->create(thumb);
+
+    node->app_redraw();
+    return true;
+}
+} // namespace
+
 Node* NodeDialogCloud::clone_instantiate() const
 {
     return new NodeDialogCloud();
@@ -139,32 +174,8 @@ void NodeDialogCloud::load_thumbs_thread()
             if (closed)
                 break;
 
-            res.clear();
+            if (!load_cloud_thumb(curl, n, node, res))
-            char* url_escaped = curl_easy_escape(curl, n.c_str(), (int)n.size());
+                break;
-            std::string url = std::string("https://panopainter.com/cloud/cloud-info.php?file=") + url_escaped;
-            delete url_escaped;
-            curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
-            LOG("%s", url.c_str());
-            auto err = curl_easy_perform(curl);
-            if (err != CURLE_OK)
-                break; // TODO: handle this error with a message or something
-            auto info = split(res, ',', 3);
-            int width = atoi(info[0].c_str());
-            int height = atoi(info[1].c_str());
-            int comp = atoi(info[2].c_str());
-            assert(comp == 4);
-            std::string rgb;
-            rgb.resize(Base64::DecodedLength(info[3]));
-            Base64::Decode(info[3], &rgb);
-            Image thumb;
-            thumb.create(width, height);
-            thumb.copy_from((uint8_t*)rgb.data());
-
-            auto image_tex = node->find<NodeImageTexture>("thumb-tex");
-            image_tex->tex = std::make_shared<Texture2D>();
-            image_tex->tex->create(thumb);
-
-            app_redraw();
         }
         curl_easy_cleanup(curl);
     }