chore: initialize frontend repo with teaching terminology updates

Add the current frontend codebase with a baseline .gitignore and update piano-specific UI terms to teaching-oriented terms for the current product context.

Made-with: Cursor

weapp/utils/log.js

@@ -0,0 +1,30 @@
+var log = wx.getRealtimeLogManager ? wx.getRealtimeLogManager() : null
+
+module.exports = {
+  debug() {
+    if (!log) return
+    log.debug.apply(log, arguments)
+  },
+  info() {
+    if (!log) return
+    log.info.apply(log, arguments)
+  },
+  warn() {
+    if (!log) return
+    log.warn.apply(log, arguments)
+  },
+  error() {
+    if (!log) return
+    log.error.apply(log, arguments)
+  },
+  setFilterMsg(msg) { // 从基础库2.7.3开始支持
+    if (!log || !log.setFilterMsg) return
+    if (typeof msg !== 'string') return
+    log.setFilterMsg(msg)
+  },
+  addFilterMsg(msg) { // 从基础库2.8.1开始支持
+    if (!log || !log.addFilterMsg) return
+    if (typeof msg !== 'string') return
+    log.addFilterMsg(msg)
+  }
+}