refactor: separate log timestamp from message as structured LogEntry

Introduced models.LogEntry{Message, CreatedAt} to replace raw strings
in the log pipeline. Timestamps are now formatted at render time, not
baked into stored messages.

- Engine: appendLog stores LogEntry with time.Now()
- Store: LoadLogs returns []LogEntry, selects created_at from DB
- Store: strips legacy [HH:MM] prefix from pre-refactor DB entries
- TUI: sidebar shows "MM/DD HH:MM" from CreatedAt
- TUI: full log view shows "MM/DD HH:MM" from CreatedAt
- SaveLog still receives plain message string (DB handles timestamp)

internal/tui/tab_logs.go

@@ -3,6 +3,8 @@ package tui
 import (
 	"fmt"
 	"strings"
+
+	"gitea.lerkolabs.com/lerkolabs/uptop/internal/models"
 )
 
 type logSeverity int
@@ -15,8 +17,8 @@ const (
 	severitySystem
 )
 
-func classifyLog(line string) logSeverity {
-	lower := strings.ToLower(line)
+func classifyLog(msg string) logSeverity {
+	lower := strings.ToLower(msg)
 	switch {
 	case strings.Contains(lower, "confirmed down"),
 		strings.Contains(lower, "is down"),
@@ -63,44 +65,29 @@ func (m Model) renderLogTag(sev logSeverity) string {
 	}
 }
 
-func (m Model) renderLogLine(line string) string {
-	sev := classifyLog(line)
+func (m Model) renderLogLine(entry models.LogEntry) string {
+	sev := classifyLog(entry.Message)
 	tag := m.renderLogTag(sev)
-
-	ts := ""
-	msg := line
-	if len(line) > 10 && line[0] == '[' {
-		if idx := strings.Index(line, "]"); idx > 0 && idx < 12 {
-			ts = m.st.subtleStyle.Render(line[1:idx])
-			msg = strings.TrimSpace(line[idx+1:])
-		}
-	}
-
-	if ts != "" {
-		return fmt.Sprintf("  %s  %s  %s", ts, tag, msg)
-	}
-	return fmt.Sprintf("  %s  %s", tag, msg)
+	ts := m.st.subtleStyle.Render(entry.CreatedAt.Local().Format("01/02 15:04"))
+	return fmt.Sprintf("  %s  %s  %s", ts, tag, entry.Message)
 }
 
-// refreshLogContent rebuilds the log viewport from the full engine log list,
-// filtering before windowing so the entry count and "(n hidden)" reflect all
-// logs, not just the visible viewport slice.
 func (m *Model) refreshLogContent() {
 	var rendered []string
 	total := 0
 	shown := 0
 
-	for _, line := range m.engine.GetLogs() {
-		if strings.TrimSpace(line) == "" {
+	for _, entry := range m.engine.GetLogs() {
+		if strings.TrimSpace(entry.Message) == "" {
 			continue
 		}
 		total++
-		sev := classifyLog(line)
+		sev := classifyLog(entry.Message)
 		if m.logFilterImportant && !isImportantLog(sev) {
 			continue
 		}
 		shown++
-		rendered = append(rendered, m.renderLogLine(line))
+		rendered = append(rendered, m.renderLogLine(entry))
 	}
 
 	m.logTotal = total

internal/tui/tab_logs_sidebar.go

@@ -3,11 +3,12 @@ package tui
 import (
 	"strings"
 
+	"gitea.lerkolabs.com/lerkolabs/uptop/internal/models"
 	"github.com/charmbracelet/lipgloss"
 )
 
-func (m Model) renderCompactLogLine(line string, maxW int) string {
-	sev := classifyLog(line)
+func (m Model) renderCompactLogLine(entry models.LogEntry, maxW int) string {
+	sev := classifyLog(entry.Message)
 
 	var tag string
 	switch sev {
@@ -23,33 +24,20 @@ func (m Model) renderCompactLogLine(line string, maxW int) string {
 		tag = m.st.subtleStyle.Render("·")
 	}
 
-	ts := ""
-	msg := line
-	if len(line) > 10 && line[0] == '[' {
-		if idx := strings.Index(line, "]"); idx > 0 && idx < 12 {
-			ts = line[1:idx]
-			msg = strings.TrimSpace(line[idx+1:])
-		}
-	}
+	ts := entry.CreatedAt.Local().Format("01/02 15:04")
 
+	msg := entry.Message
 	msg = strings.TrimPrefix(msg, "Monitor ")
 	msg = strings.TrimPrefix(msg, "Push ")
 
-	// prefix: " HH:MM ● " = 9 visible chars, or " ● " = 3 without timestamp
-	prefixW := 3
-	if ts != "" {
-		prefixW = len(ts) + 4
-	}
+	prefixW := len(ts) + 4
 	msgW := maxW - prefixW
 	if msgW < 5 {
 		msgW = 5
 	}
 	msg = limitStr(msg, msgW)
 
-	if ts != "" {
-		return " " + m.st.subtleStyle.Render(ts) + " " + tag + " " + msg
-	}
-	return " " + tag + " " + msg
+	return " " + m.st.subtleStyle.Render(ts) + " " + tag + " " + msg
 }
 
 func (m Model) viewLogsSidebar(width, maxLines int) string {
@@ -61,14 +49,14 @@ func (m Model) viewLogsSidebar(width, maxLines int) string {
 	sidebarStyle := lipgloss.NewStyle().Width(width).MaxWidth(width)
 
 	var all []string
-	for _, line := range logs {
-		if strings.TrimSpace(line) == "" {
+	for _, entry := range logs {
+		if strings.TrimSpace(entry.Message) == "" {
 			continue
 		}
-		if m.logFilterImportant && !isImportantLog(classifyLog(line)) {
+		if m.logFilterImportant && !isImportantLog(classifyLog(entry.Message)) {
 			continue
 		}
-		all = append(all, m.renderCompactLogLine(line, width))
+		all = append(all, m.renderCompactLogLine(entry, width))
 	}
 
 	start := m.logScrollOffset
@@ -87,11 +75,11 @@ func (m Model) viewLogsSidebar(width, maxLines int) string {
 func (m *Model) scrollLogs(delta int) {
 	logs := m.engine.GetLogs()
 	total := 0
-	for _, line := range logs {
-		if strings.TrimSpace(line) == "" {
+	for _, entry := range logs {
+		if strings.TrimSpace(entry.Message) == "" {
 			continue
 		}
-		if m.logFilterImportant && !isImportantLog(classifyLog(line)) {
+		if m.logFilterImportant && !isImportantLog(classifyLog(entry.Message)) {
 			continue
 		}
 		total++

internal/tui/update_test.go

@@ -300,7 +300,7 @@ func TestWriteDoneMsg_LogsErrorAndReloads(t *testing.T) {
 	mm := updated.(Model)
 	found := false
 	for _, line := range mm.engine.GetLogs() {
-		if strings.Contains(line, "Delete site failed: boom") {
+		if strings.Contains(line.Message, "Delete site failed: boom") {
 			found = true
 		}
 	}