fix(dev-preview): address code review issues

- Use get_logger() from src.logging_config instead of logging.getLogger()
  in visual_display_manager.py to match project logging conventions
- Eliminate duplicate public/private weather draw methods — public draw_sun/
  draw_cloud/draw_rain/draw_snow now delegate to the private _draw_* variants
  so plugins get consistent pixel output in tests vs production
- Default install_deps=False in dev_server.py and render_plugin.py — dev
  scripts don't need to run pip install; developers are expected to have
  plugin deps installed in their venv already
- Guard plugins_dir fixture against PermissionError during directory iteration
- Fix PluginInstallManager.updateAll() to fall back to window.installedPlugins
  when PluginStateManager.installedPlugins is empty (plugins_manager.js
  populates window.installedPlugins independently of PluginStateManager)
- Remove 5 debug console.log statements from plugins_manager.js button setup
  and initialization code

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

web_interface/static/v3/js/plugins/install_manager.js

@@ -85,11 +85,16 @@ const PluginInstallManager = {
      * @returns {Promise<Array>} Update results
      */
     async updateAll(onProgress) {
-        if (!window.PluginStateManager || !window.PluginStateManager.installedPlugins) {
-            throw new Error('Installed plugins not loaded');
-        }
+        // Prefer PluginStateManager if populated, fall back to window.installedPlugins
+        // (plugins_manager.js populates window.installedPlugins independently)
+        const stateManagerPlugins = window.PluginStateManager && window.PluginStateManager.installedPlugins;
+        const plugins = (stateManagerPlugins && stateManagerPlugins.length > 0)
+            ? stateManagerPlugins
+            : (window.installedPlugins || []);
 
-        const plugins = window.PluginStateManager.installedPlugins;
+        if (!plugins.length) {
+            return [];
+        }
         const results = [];
 
         for (let i = 0; i < plugins.length; i++) {