feat(review): improve drill-in scrolling and post-run access

cmd/entire/cli/review/tui_detail.go

@@ -1,10 +1,11 @@
 // Package review — see env.go for package-level rationale.
 //
-// tui_detail.go provides detailView, the pure-function renderer for the
-// alt-screen drill-in view. It renders one agent's live event buffer with
-// header/footer chrome and pads to exactly termHeight lines so every frame
-// has the same line count (avoids ghost rows in the Bubble Tea alt-screen
-// frame diff).
+// tui_detail.go provides the alt-screen drill-in renderer. The body content is
+// produced by [eventLines] (one or more wrapped lines per event) and fed into
+// a bubbles/v2/viewport on [reviewTUIModel]; this file's [detailFrame] is the
+// pure-function chrome (header + body + footer) that wraps the viewport's
+// pre-rendered output and pads to exactly termHeight lines so every frame has
+// the same line count (avoids ghost rows in Bubble Tea's alt-screen diff).
 package review
 
 import (
@@ -14,16 +15,22 @@ import (
 	reviewtypes "github.com/entireio/cli/cmd/entire/cli/review/types"
 )
 
-// eventLine converts a single Event to a single display line for the detail
-// view. The line is stripped of control sequences and truncated to maxWidth
-// display cells.
-func eventLine(ev reviewtypes.Event, maxWidth int) string {
+// eventLines converts a single Event to one or more display lines for the
+// detail view, wrapped to maxWidth display cells. AssistantText preserves
+// embedded '\n' as paragraph breaks; other event types render as a single
+// sanitized line that wraps only on width overflow.
+func eventLines(ev reviewtypes.Event, maxWidth int) []string {
+	if maxWidth <= 0 {
+		return nil
+	}
 	var raw string
 	switch e := ev.(type) {
 	case reviewtypes.Started:
 		raw = "[started]"
 	case reviewtypes.AssistantText:
-		raw = e.Text
+		// AssistantText is the only event that can contain meaningful
+		// multi-line content; wrapDisplayWidth honors embedded newlines.
+		return wrapDisplayWidth(e.Text, maxWidth)
 	case reviewtypes.ToolCall:
 		raw = fmt.Sprintf("[tool: %s] %s", e.Name, e.Args)
 	case reviewtypes.Tokens:
@@ -44,100 +51,85 @@ func eventLine(ev reviewtypes.Event, maxWidth int) string {
 		raw = "[unknown event]"
 	}
 
-	return truncateDisplayWidth(sanitizeDisplayText(raw), maxWidth)
+	return wrapDisplayWidth(raw, maxWidth)
 }
 
-// detailView renders the alt-screen drill-in for one agent. row is the agentRow
-// being inspected. termWidth/termHeight come from WindowSizeMsg.
+// buildEventLines returns every wrapped body line for the supplied event
+// buffer, in order. The result is suitable for feeding into a viewport via
+// SetContent.
+func buildEventLines(buffer []reviewtypes.Event, maxWidth int) []string {
+	if len(buffer) == 0 || maxWidth <= 0 {
+		return nil
+	}
+	out := make([]string, 0, len(buffer))
+	for _, ev := range buffer {
+		out = append(out, eventLines(ev, maxWidth)...)
+	}
+	return out
+}
+
+// detailFrame renders the alt-screen drill-in chrome around a body string. The
+// body is the viewport's already-rendered view (already clipped to bodyHeight
+// lines by the viewport itself). detailFrame adds:
 //
-// Rendering:
 //  1. Header line: "─── <name> (<n> events) ─────────────" (filled to termWidth)
-//  2. Body: events from row.buffer scrolled to detailScroll, one line each,
-//     sanitized and truncated to termWidth display cells.
-//  3. Footer line: "←/→ switch agent · Esc back · ↑/↓ scroll"
+//  2. Body: trimmed/padded to exactly bodyHeight lines, each padded to termWidth.
+//  3. Footer line: "←/→ switch agent · Esc back · PgUp/PgDn scroll"
 //
-// CRITICAL: the rendered string is padded to exactly termHeight lines so every
-// frame has the same line count. Bubble Tea's alt-screen frame diff leaves ghost
-// rows if the line count varies between frames.
-func detailView(row agentRow, detailScroll, termWidth, termHeight int) string {
+// CRITICAL: the rendered string is exactly termHeight lines. Bubble Tea's
+// alt-screen diff leaves ghost rows if the line count varies between frames.
+func detailFrame(row agentRow, body string, termWidth, termHeight int) string {
 	if termWidth < 1 {
 		termWidth = 80
 	}
 	if termHeight < 3 {
 		termHeight = 3
 	}
 
-	// Reserve 1 line for header, 1 for footer; the body fills the rest.
 	bodyHeight := termHeight - 2
 	if bodyHeight < 0 {
 		bodyHeight = 0
 	}
 
-	// 1. Header line.
 	headerContent := fmt.Sprintf("─── %s (%d events) ", sanitizeDisplayText(row.name), len(row.buffer))
 	header := padDisplayWidthWith(headerContent, termWidth, "─")
 
-	// 2. Body lines.
-	lines := buildBodyLines(row.buffer, detailScroll, bodyHeight, termWidth)
-
-	// Pad body to exactly bodyHeight lines.
-	for len(lines) < bodyHeight {
-		lines = append(lines, strings.Repeat(" ", termWidth))
-	}
+	// Normalize the viewport body to exactly bodyHeight lines, each padded to
+	// termWidth so frame width is stable.
+	bodyLines := splitBodyToHeight(body, bodyHeight, termWidth)
 
-	// 3. Footer line.
-	footerText := "←/→ switch agent · Esc back · ↑/↓ scroll"
+	footerText := "←/→ switch agent · Esc back · PgUp/PgDn scroll"
 	footer := padDisplayWidth(footerText, termWidth)
 
-	// Assemble: header + body + footer = termHeight lines total.
 	var b strings.Builder
 	b.WriteString(header)
 	b.WriteString("\n")
-	for _, line := range lines {
+	for _, line := range bodyLines {
 		b.WriteString(line)
 		b.WriteString("\n")
 	}
 	b.WriteString(footer)
-	// No trailing newline after footer — the caller (View) adds its own.
-
 	return b.String()
 }
 
-// buildBodyLines computes the visible body lines for the detail view.
-// It takes the full event buffer, a scroll offset, the maximum number of lines
-// to show, and the column width. Returns at most bodyHeight lines.
-func buildBodyLines(buffer []reviewtypes.Event, scroll, bodyHeight, termWidth int) []string {
-	if len(buffer) == 0 || bodyHeight <= 0 {
+// splitBodyToHeight normalizes a multi-line body string to exactly bodyHeight
+// lines, each truncated and padded to termWidth. Lines beyond bodyHeight are
+// dropped; missing lines are padded with spaces.
+func splitBodyToHeight(body string, bodyHeight, termWidth int) []string {
+	if bodyHeight <= 0 {
 		return nil
 	}
-
-	// Clamp scroll to valid range.
-	if scroll < 0 {
-		scroll = 0
-	}
-	if scroll >= len(buffer) {
-		scroll = len(buffer) - 1
-	}
-
-	// Determine window: scroll is the index of the LAST visible line so the
-	// user sees the most-recent events when auto-scrolling. Work backwards.
-	end := scroll + 1 // exclusive upper bound
-	start := end - bodyHeight
-	if start < 0 {
-		start = 0
+	var raw []string
+	if body != "" {
+		raw = strings.Split(strings.TrimRight(body, "\n"), "\n")
 	}
-	// Clamp end to buffer length.
-	if end > len(buffer) {
-		end = len(buffer)
-		start = end - bodyHeight
-		if start < 0 {
-			start = 0
+	lines := make([]string, 0, bodyHeight)
+	for i := range bodyHeight {
+		if i < len(raw) {
+			lines = append(lines, padDisplayWidth(raw[i], termWidth))
+		} else {
+			lines = append(lines, strings.Repeat(" ", termWidth))
 		}
 	}
-
-	lines := make([]string, 0, end-start)
-	for i := start; i < end; i++ {
-		lines = append(lines, eventLine(buffer[i], termWidth))
-	}
 	return lines
 }