feat(tui): always-visible capture bar with focus cycling

Replace drawer-based input with permanent capture bar at bottom.
Focus defaults to capture on startup — open nib, start typing.

- Remove stateInput; route via focusCapture/focusList/focusDetail
- Tab cycles: capture → list → detail (split) → capture
- Esc cascades: clear search → clear filter → focus capture
- Capture bar shows blinking cursor when focused, dims when not
- Intent cycling moved from tab to i (tab now cycles focus)
- Parse preview shown inline in status bar while typing
- Content area constant height (no layout thrash from drawer)

internal/tui/input.go

@@ -19,7 +19,6 @@ type inputResult struct {
 
 type inputModel struct {
 	ti      textinput.Model
-	active  bool
 	preview *parse.Result
 }
 
@@ -31,15 +30,8 @@ func newInputModel() inputModel {
 	return inputModel{ti: ti}
 }
 
-func (i *inputModel) focus() {
-	i.active = true
-	i.ti.Focus()
-}
-
-func (i *inputModel) reset() {
-	i.active = false
+func (i *inputModel) clearText() {
 	i.ti.SetValue("")
-	i.ti.Blur()
 	i.preview = nil
 }
 
@@ -101,33 +93,21 @@ func (i inputModel) updateKey(msg tea.KeyMsg) inputModel {
 	return i
 }
 
-func (i inputModel) view(width int) string {
-	var b strings.Builder
-	label := "capture"
-	prefix := "── "
-	suffix := " "
-	dashCount := width - len(prefix) - len(label) - len(suffix)
-	if dashCount < 0 {
-		dashCount = 0
+func (i inputModel) viewBar(width int, focused bool) string {
+	tiView := i.ti.View()
+	if focused {
+		return tiView
 	}
-	b.WriteString(drawerBorderStyle.Render(prefix) +
-		hintDescStyle.Render(label) +
-		drawerBorderStyle.Render(suffix+strings.Repeat("─", dashCount)))
-	b.WriteString("\n")
-	b.WriteString(i.ti.View())
-	b.WriteString("\n")
-	b.WriteString(drawerHintsStyle.Render(renderHints([]hint{
-		{"enter", "submit"}, {"esc", "cancel"}, {"?", "search"},
-		{"-", "todo"}, {"@", "event"}, {"!", "reminder"},
-	})))
-	b.WriteString("\n")
-	b.WriteString(i.renderPreview(width))
-	return b.String()
+	val := i.ti.Value()
+	if val != "" {
+		return hintDescStyle.Render("› " + val)
+	}
+	return hintDescStyle.Render("› capture a thought…")
 }
 
-func (i inputModel) renderPreview(width int) string {
+func (i inputModel) previewText() string {
 	if i.preview == nil {
-		return drawerPreviewStyle.Render("")
+		return ""
 	}
 
 	p := i.preview
@@ -140,7 +120,7 @@ func (i inputModel) renderPreview(width int) string {
 		for _, t := range p.FilterTags {
 			q += " #" + t
 		}
-		return drawerPreviewStyle.Render("search: " + q)
+		return "search: " + q
 	}
 
 	glyph := glyphForParsed(p.Glyph)
@@ -152,22 +132,16 @@ func (i inputModel) renderPreview(width int) string {
 	var parts []string
 	parts = append(parts, glyph, body)
 	for _, t := range p.Tags {
-		parts = append(parts, tagStyle.Render("#"+t))
+		parts = append(parts, "#"+t)
 	}
 	if p.Pin {
-		parts = append(parts, pinnedStyle.Render("•"))
+		parts = append(parts, "•")
 	}
 	if p.CardSuffix != nil {
-		parts = append(parts, affordanceStyle.Render(*p.CardSuffix))
+		parts = append(parts, *p.CardSuffix)
 	}
 
-	line := strings.Join(parts, " ")
-	maxW := width - 4
-	if maxW > 0 && len(stripAnsi(line)) > maxW {
-		line = truncate(line, maxW)
-	}
-
-	return drawerPreviewStyle.Render(line)
+	return strings.Join(parts, " ")
 }
 
 func glyphForParsed(glyph string) string {
@@ -182,7 +156,3 @@ func glyphForParsed(glyph string) string {
 		return "—"
 	}
 }
-
-func drawerLines() int {
-	return 3
-}