feat: add growth tracking page and related functionality

- Implemented a new Growth page to track practice time and trends.
- Added API integration for fetching review data.
- Created components for displaying practice statistics and trends.
- Updated navigation titles for the main index and growth pages.
- Removed unused styles from the index page.
- Introduced a Projects management page for adding and editing practice projects.
- Developed a Record form for logging practice sessions with validation.
- Added utility functions for date manipulation and duration formatting.
- Implemented error handling and session management in the practice service.
- Created unit tests for the practice service to ensure reliability.

.scratch/ballet-practice-v1/issues/08-voice-feasibility.md

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+# 语音解析、LLM 与工具调用如何可靠地产生练习记录？
+
+Type: research
+Labels: wayfinder:research
+Status: claimed
+Assignee: yuxuanhui
+Research agent: /root/voice_feasibility
+Parent: [芭蕾岛产品规划：练习记录、语音录入与动作成长](../map.md)
+Blocked by: none
+
+## Question
+
+结合 Taro 微信小程序与现有 Go 后端，核实录音、语音识别、中文与芭蕾术语处理、结构化抽取及工具调用所需的可用能力。比较短录音后处理与实时交互对首期的影响，提出可验证的记录草稿流程；列明相对日期、多项练习、信息缺失、语音更正、重复提交和模型失败的处理原则。只做文档研究，不调用付费模型、不选择最终供应商、不修改业务代码。