feat(tui): add tag autocomplete and query composition

Tag autocomplete shows suggestions when typing #partial in capture bar.
Tab/enter accepts, up/down navigates, esc dismisses.

Query composition extends ? search with date filters (@today, @week,
@month, <7d, >30d), card type filters (^snippet), all composable
with existing text and tag filters.

internal/tui/model.go

@@ -79,26 +79,30 @@ type model struct {
 	width  int
 	height int
 
-	list     listModel
-	cards    cardsModel
-	detail   detailModel
-	input    inputModel
-	filter   filterModel
-	promote  promoteModel
-	absorb   absorbModel
-	tagRail  tagRailModel
-	stumble  stumbleModel
-	showHelp bool
+	list         listModel
+	cards        cardsModel
+	detail       detailModel
+	input        inputModel
+	filter       filterModel
+	promote      promoteModel
+	absorb       absorbModel
+	tagRail      tagRailModel
+	stumble      stumbleModel
+	showHelp     bool
+	autocomplete autocompleteModel
 
 	focus       focusPane
 	splitDetail bool
 	showTagRail bool
 
-	filterTag   string
-	confirmID   string
-	cardsSort   cardsSort
-	searchQuery string
-	searchTags  []string
+	filterTag     string
+	confirmID     string
+	cardsSort     cardsSort
+	searchQuery   string
+	searchTags    []string
+	queryDateFrom *string
+	queryDateTo   *string
+	queryCardType *db.CardType
 
 	status    string
 	statusSeq int
@@ -149,6 +153,15 @@ func (m model) listParams() db.ListParams {
 	if m.filterTag != "" {
 		p.Tag = &m.filterTag
 	}
+	if m.queryDateFrom != nil {
+		p.From = m.queryDateFrom
+	}
+	if m.queryDateTo != nil {
+		p.To = m.queryDateTo
+	}
+	if m.queryCardType != nil {
+		p.CardTypeFilter = m.queryCardType
+	}
 	if m.mode == modeCards {
 		p.CardsOnly = true
 		switch m.cardsSort {
@@ -167,7 +180,7 @@ func (m model) listParams() db.ListParams {
 }
 
 func (m model) hasSearch() bool {
-	return m.searchQuery != "" || len(m.searchTags) > 0
+	return m.searchQuery != "" || len(m.searchTags) > 0 || m.queryDateFrom != nil || m.queryDateTo != nil || m.queryCardType != nil
 }
 
 func (m *model) applySearch() {
@@ -363,6 +376,10 @@ func (m model) updateKeys(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 func (m model) updateCapture(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 	switch msg.String() {
 	case "enter":
+		if m.autocomplete.active {
+			m.acceptAutocomplete()
+			return m, nil
+		}
 		val := m.input.ti.Value()
 		if val == "" {
 			cmd := m.setFocus(focusList)
@@ -375,23 +392,92 @@ func (m model) updateCapture(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		if result.query {
 			m.searchQuery = result.body
 			m.searchTags = result.tags
+			m.queryDateFrom = result.dateFrom
+			m.queryDateTo = result.dateTo
+			m.queryCardType = result.cardType
 			m.input.clearText()
+			m.autocomplete.active = false
+			if result.dateFrom != nil || result.dateTo != nil || result.cardType != nil {
+				cmd := m.setFocus(focusList)
+				return m, tea.Batch(cmd, loadEntities(m.store, m.listParams()))
+			}
 			m.applySearch()
 			cmd := m.setFocus(focusList)
 			return m, cmd
 		}
 		if result.entity != nil {
+			m.autocomplete.active = false
 			return m, createEntity(m.store, result.entity)
 		}
 		return m, nil
-	case "esc", "tab":
+	case "tab":
+		if m.autocomplete.active {
+			m.acceptAutocomplete()
+			return m, nil
+		}
 		cmd := m.setFocus(focusList)
 		return m, cmd
+	case "esc":
+		if m.autocomplete.active {
+			m.autocomplete.active = false
+			return m, nil
+		}
+		cmd := m.setFocus(focusList)
+		return m, cmd
+	case "up":
+		if m.autocomplete.active {
+			m.autocomplete.moveUp()
+			return m, nil
+		}
+	case "down":
+		if m.autocomplete.active {
+			m.autocomplete.moveDown()
+			return m, nil
+		}
 	}
 	m.input = m.input.updateKey(msg)
+	m.updateAutocompleteSuggestions()
 	return m, nil
 }
 
+func (m *model) updateAutocompleteSuggestions() {
+	val := m.input.ti.Value()
+	pos := m.input.ti.Position()
+	start, end, prefix, ok := tagTokenAtCursor(val, pos)
+	if !ok || prefix == "" {
+		m.autocomplete.active = false
+		return
+	}
+	suggestions := filterTagSuggestions(m.tagRail.tags, prefix)
+	if len(suggestions) == 0 {
+		m.autocomplete.active = false
+		return
+	}
+	m.autocomplete.suggestions = suggestions
+	m.autocomplete.prefix = prefix
+	m.autocomplete.tokenStart = start
+	m.autocomplete.tokenEnd = end
+	m.autocomplete.active = true
+	if m.autocomplete.cursor >= len(suggestions) {
+		m.autocomplete.cursor = 0
+	}
+}
+
+func (m *model) acceptAutocomplete() {
+	if !m.autocomplete.active || len(m.autocomplete.suggestions) == 0 {
+		return
+	}
+	selected := m.autocomplete.selected()
+	if selected == "" {
+		return
+	}
+	val := m.input.ti.Value()
+	newVal := val[:m.autocomplete.tokenStart] + "#" + selected + " " + val[m.autocomplete.tokenEnd:]
+	m.input.ti.SetValue(newVal)
+	m.input.ti.SetCursor(m.autocomplete.tokenStart + 1 + len(selected) + 1)
+	m.autocomplete.active = false
+}
+
 func (m model) updateBrowse(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 	// Tag rail focus handling
 	if m.focus == focusTagRail && m.state == stateList {
@@ -636,9 +722,16 @@ func (m model) updateBrowse(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 			return m, nil
 		}
 		if m.state == stateList && m.hasSearch() {
+			hadDBFilters := m.queryDateFrom != nil || m.queryDateTo != nil || m.queryCardType != nil
 			m.searchQuery = ""
 			m.searchTags = nil
+			m.queryDateFrom = nil
+			m.queryDateTo = nil
+			m.queryCardType = nil
 			m.status = ""
+			if hadDBFilters {
+				return m, loadEntities(m.store, m.listParams())
+			}
 			if m.mode == modeCards {
 				m.cards.applyFilter()
 			} else {
@@ -953,6 +1046,10 @@ func (m model) View() string {
 
 	content = lipgloss.NewStyle().Width(m.width).Height(m.contentHeight()).Render(content)
 
+	acView := m.autocomplete.view(m.width)
+	if acView != "" {
+		return header + "\n" + content + "\n" + acView + "\n" + captureBar + "\n" + statusLine
+	}
 	return header + "\n" + content + "\n" + captureBar + "\n" + statusLine
 }
 
@@ -994,6 +1091,15 @@ func (m model) headerView() string {
 		for _, t := range m.searchTags {
 			pill += " #" + t
 		}
+		if m.queryDateFrom != nil {
+			pill += " from:" + *m.queryDateFrom
+		}
+		if m.queryDateTo != nil {
+			pill += " to:" + *m.queryDateTo
+		}
+		if m.queryCardType != nil {
+			pill += " ^" + string(*m.queryCardType)
+		}
 		header += " " + searchPillStyle.Render(pill)
 	}
 
@@ -1021,7 +1127,18 @@ func (m model) statusLine() string {
 }
 
 func (m model) contentHeight() int {
-	return m.height - 4
+	h := m.height - 4
+	if m.autocomplete.active && len(m.autocomplete.suggestions) > 0 {
+		n := m.autocomplete.visibleCount()
+		if len(m.autocomplete.suggestions) > maxSuggestions {
+			n++
+		}
+		h -= n + 1
+	}
+	if h < 1 {
+		h = 1
+	}
+	return h
 }
 
 func (m *model) recalcSizes() {