feat(theme): 侧栏底改var(--bg-side)(暗色不再露亮底,用户要求②)+折叠图标分风格(亮☰暗☲,theme_toggle同步,要求③)+i18n开发产线四语

wwwroot/i18n/en/i18n.json

@@ -25,7 +25,7 @@
   "产线": "Pipelines",
   "商机产线": "Opportunity Pipeline",
   "投标产线": "Bidding Pipeline",
-  "开发产线": "Development Pipeline",
+  "开发产线": "Dev Pipeline",
   "运维产线": "Operations Pipeline",
   "营销产线": "Marketing Pipeline",
   "运维产线（面向FOMS）规划中，尚未开发": "Operations Pipeline (for FOMS) is planned, not yet developed",

wwwroot/index.ui

@@ -161,7 +161,7 @@
             "width": "220px",
             "minWidth": "200px",
             "height": "100%",
-            "bgcolor": "#f8fafc",
+            "bgcolor": "var(--bg-side)",
             "mobile_hidden": true
           },
           "subwidgets": [

wwwroot/theme_toggle.js

@@ -11,6 +11,13 @@
             btn.opts.label = (t === 'light') ? '🌙' : '☀️';
             btn.dom_element.textContent = btn.opts.label;
         }
+        // 侧栏折叠图标分风格（2026-09-18 用户要求）：亮=☰ 暗=☰ 反色不可行（顶栏深色），
+        // 改用主题感知的展开/收起语义图标：亮色 ☰ / 暗色 ☲（线条更亮更细的变体）
+        var tg = bricks.getWidgetById('btn_toggle_sidebar', bricks.app);
+        if (tg && tg.dom_element){
+            tg.opts.label = (t === 'light') ? '☰' : '☲';
+            tg.dom_element.textContent = tg.opts.label;
+        }
     }
     window.applyPipelineTheme = applyTheme;