feat: add project icon picker component and integrate with project management

- Implemented ProjectIconPicker component for selecting project icons.
- Created ProjectIcon component to display selected icons.
- Updated calendar page to remove unused PageHeading component.
- Modified growth page to enhance UI and improve text clarity.
- Refactored index page to include project icons and improve layout.
- Added mine page for user profile management with avatar selection.
- Introduced projects-sort page for managing project order with drag-and-drop functionality.
- Enhanced projects page to allow icon selection when adding or editing projects.
- Updated record page to streamline user experience and improve form actions.
- Adjusted practice service to support project icon management.
- Added tests for project saving functionality to ensure correct handling of icons.
- Updated global type definitions to support SVG and PNG imports.

.scratch/record-overview-and-project-order/spec.md

@@ -0,0 +1,19 @@
+# 记录总览与项目排序
+
+Type: task
+Status: resolved
+
+## Scope
+
+记录首页展示总记录时长、坚持天数和最早记录日期；项目右侧展示累计小时数。项目操作区提供纯 SVG 图标的管理列表与添加项目入口，管理列表可拖动排序并保存。
+
+## Implementation
+
+- 总览的两个主数字按同一基线区域排版，日期仅在有记录时显示为“从 YYYY 年 MM 月 DD 日”。
+- 项目累计分钟数换算为小时，项目时长数字加大。操作区只显示 28px 图标，保留无障碍名称。
+- 新增独立排序页；拖动右侧手柄调整本地顺序，点击保存后调用 `PUT /v1/projects/order`。
+- 服务端只接受当前用户完整的活跃项目 ID 列表，沿用既有位置槽位，保留归档项目和新增项目的排列语义。
+
+## Validation
+
+2026-09-29，本地代码已完成，未提交或发布。小程序 `pnpm typecheck`、`pnpm test:client`、`pnpm build` 通过；后端 `go vet ./...`、`go test -race ./...`、`go build -o bin/api ./cmd/server` 和隔离 PostgreSQL 集成测试通过。服务端测试覆盖顺序持久化、后续新增、无效或跨用户 ID、归档后重排。微信开发者工具中的实际拖动与图标显示未在本轮完成交互核验。