Update mini program development documentation and enhance user interface elements

- Added a new entry for the latest mini program development rules and APIs in the evolution index.
- Updated the skill documentation to include guidelines on privacy authorization and capability detection.
- Modified the read and settings pages to improve user experience with new input styles and layout adjustments.
- Implemented user-select functionality for text elements in the read page to enhance interactivity.
- Refined CSS styles for better responsiveness and visual consistency across various components.

miniprogram/pages/read/read.wxss

@@ -348,18 +348,20 @@
   display: flex;
   gap: 24rpx;
   margin-bottom: 48rpx;
+  width: 100%;
+  box-sizing: border-box;
 }
 
 .nav-btn {
-  flex: 1;
+  flex: 1 1 0;
+  min-width: 0;
   padding: 24rpx;
   border-radius: 24rpx;
-  max-width: 48%;
 }
 
 .nav-btn-placeholder {
-  flex: 1;
-  max-width: 48%;
+  flex: 1 1 0;
+  min-width: 0;
 }
 
 .nav-prev {
@@ -400,12 +402,16 @@
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
+  flex: 1;
+  min-width: 0;
 }
 
 .btn-row {
   display: flex;
   align-items: center;
   justify-content: space-between;
+  min-width: 0;
+  overflow: hidden;
 }
 
 .btn-arrow {