fix: address review findings and improve help footer layout

- Use maybePrefetch helper in handlePageDownKey for consistency
- Clamp flex column widths to min 1 in both queue and tasks views
- Add 'o' key to keyboard shortcuts help overlay (queue and tasks)
- Move 'o options' next to 'F fix' in queue help footer
- Split tasks help footer into two balanced rows

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mariusvniekerk

cmd/roborev/tui/handlers.go

@@ -474,11 +474,12 @@ func (m model) handlePageDownKey() (tea.Model, tea.Cmd) {
 			m.selectedIdx = nextIdx
 		}
 		m.updateSelectedJobID()
-		if m.canPaginate() {
-			if reachedEnd || m.countVisibleJobsAfter(m.selectedIdx) < queuePrefetchBuffer {
-				m.loadingMore = true
-				return m, m.fetchMoreJobs()
-			}
+		if reachedEnd && m.canPaginate() {
+			m.loadingMore = true
+			return m, m.fetchMoreJobs()
+		}
+		if cmd := m.maybePrefetch(m.selectedIdx); cmd != nil {
+			return m, cmd
 		}
 	case viewReview:
 		m.reviewScroll += pageSize

cmd/roborev/tui/render_log.go

@@ -130,6 +130,7 @@ func helpLines() []string {
 				{"x", "Cancel running/queued job"},
 				{"r", "Re-run completed/failed job"},
 				{"F", "Trigger fix for selected review"},
+				{"o", "Column options (visibility, order, borders)"},
 				{"T", "Open Tasks view"},
 				{"D", "Toggle distraction-free mode"},
 			},
@@ -186,6 +187,7 @@ func helpLines() []string {
 				{"R", "Re-trigger fix (rebase)"},
 				{"l", "View agent log"},
 				{"x", "Cancel running/queued fix job"},
+				{"o", "Column options (order, borders)"},
 				{"esc/T", "Back to queue"},
 			},
 		},

cmd/roborev/tui/render_queue.go

@@ -30,15 +30,15 @@ func (m model) getVisibleJobs() []storage.ReviewJob {
 func (m model) queueHelpRows() [][]helpItem {
 	row1 := []helpItem{
 		{"x", "cancel"}, {"r", "rerun"}, {"l", "log"}, {"p", "prompt"},
-		{"c", "comment"}, {"y", "copy"}, {"m", "commit msg"}, {"F", "fix"},
+		{"c", "comment"}, {"y", "copy"}, {"m", "commit msg"}, {"F", "fix"}, {"o", "options"},
 	}
 	row2 := []helpItem{
 		{"↑/↓", "nav"}, {"↵", "review"}, {"a", "handled"},
 	}
 	if !m.lockedRepoFilter || !m.lockedBranchFilter {
 		row2 = append(row2, helpItem{"f", "filter"})
 	}
-	row2 = append(row2, helpItem{"h", "hide"}, helpItem{"o", "options"}, helpItem{"D", "focus"}, helpItem{"T", "tasks"}, helpItem{"?", "help"}, helpItem{"q", "quit"})
+	row2 = append(row2, helpItem{"h", "hide"}, helpItem{"D", "focus"}, helpItem{"T", "tasks"}, helpItem{"?", "help"}, helpItem{"q", "quit"})
 	return [][]helpItem{row1, row2}
 }
 func (m model) queueHelpLines() int {
@@ -337,9 +337,9 @@ func (m model) renderQueueView() string {
 					continue
 				}
 				if flexContentTotal > 0 {
-					colWidths[c] = remaining * contentWidth[c] / flexContentTotal
+					colWidths[c] = max(remaining*contentWidth[c]/flexContentTotal, 1)
 				} else {
-					colWidths[c] = remaining / totalFlex
+					colWidths[c] = max(remaining/totalFlex, 1)
 				}
 				distributed += colWidths[c]
 			}

cmd/roborev/tui/render_tasks.go

@@ -164,7 +164,8 @@ func (m model) renderTasksView() string {
 
 	// Help row calculation for visible rows
 	tasksHelpRows := [][]helpItem{
-		{{"enter", "view"}, {"P", "parent"}, {"p", "patch"}, {"A", "apply"}, {"l", "log"}, {"x", "cancel"}, {"o", "options"}, {"?", "help"}, {"T/esc", "back"}},
+		{{"enter", "view"}, {"P", "parent"}, {"p", "patch"}, {"A", "apply"}, {"l", "log"}},
+		{{"x", "cancel"}, {"o", "options"}, {"?", "help"}, {"T/esc", "back"}},
 	}
 	tasksHelpLines := len(reflowHelpRows(tasksHelpRows, m.width))
 	visibleRows := m.height - (6 + tasksHelpLines) // title + header + separator + status + scroll + help(N)
@@ -247,9 +248,9 @@ func (m model) renderTasksView() string {
 		distributed := 0
 		for _, c := range flexCols {
 			if flexContentTotal > 0 {
-				colWidths[c] = remaining * contentWidth[c] / flexContentTotal
+				colWidths[c] = max(remaining*contentWidth[c]/flexContentTotal, 1)
 			} else {
-				colWidths[c] = remaining / totalFlex
+				colWidths[c] = max(remaining/totalFlex, 1)
 			}
 			distributed += colWidths[c]
 		}