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.

backend/internal/practice/review.go

@@ -13,10 +13,12 @@ type ProjectMinutes struct {
 	Minutes   int64  `json:"minutes"`
 }
 type Summary struct {
-	TotalMinutes int64            `json:"totalMinutes"`
-	PracticeDays int              `json:"practiceDays"`
-	RecordCount  int64            `json:"recordCount"`
-	Projects     []ProjectMinutes `json:"projects"`
+	TotalMinutes int64 `json:"totalMinutes"`
+	PracticeDays int   `json:"practiceDays"`
+	// FirstDate is the earliest actual practice date, or empty without records.
+	FirstDate   string           `json:"firstDate"`
+	RecordCount int64            `json:"recordCount"`
+	Projects    []ProjectMinutes `json:"projects"`
 }
 type DayMinutes struct {
 	Date    string `json:"date"`
@@ -42,6 +44,9 @@ func newSummary() *summaryBuilder {
 func (b *summaryBuilder) add(date string, project ProjectMinutes, count int64) {
 	b.summary.TotalMinutes += project.Minutes
 	b.summary.RecordCount += count
+	if b.summary.FirstDate == "" || date < b.summary.FirstDate {
+		b.summary.FirstDate = date
+	}
 	b.dates[date] = true
 	previous := b.projects[project.ProjectID]
 	project.Minutes += previous.Minutes