tix-tracker 0.12.0

#[allow(clippy::wildcard_imports)]
use super::*;

impl App {
    /// Persist the cards whose positions differ from the automatic ordering so
    /// a drag-reordered column survives rebuilds/restarts without storing a
    /// full column snapshot.
    pub(in crate::app) fn persist_card_order(&mut self) -> bool {
        let board_name = self.active_board_name().to_string();
        let mut order = Vec::new();
        let active_config = self.active_board_config().clone();
        order.extend(
            self.board
                .columns
                .iter()
                .flat_map(|col| board::sparse_card_order(&active_config, &col.cards)),
        );
        order.extend(
            self.board
                .hidden
                .iter()
                .flat_map(|col| board::sparse_card_order(&active_config, &col.cards)),
        );
        order.extend(board::sparse_card_order(
            &active_config,
            &self.board.mismatch.cards,
        ));
        let Some(board_config) = self.store.config.kanban.configurations.get_mut(&board_name)
        else {
            return false;
        };
        board_config.card_order = order;
        self.persist_config()
    }

    pub(in crate::app) fn reorder_selected_within_column(
        &mut self,
        col: usize,
        from_row: usize,
        to_row: usize,
    ) -> Result<Action> {
        let (filename, number, column_name) = {
            let Some(column) = self.board.columns.get_mut(col) else {
                return Ok(Action::None);
            };
            if from_row >= column.cards.len() || to_row >= column.cards.len() || from_row == to_row
            {
                return Ok(Action::None);
            }
            let card = column.cards.remove(from_row);
            let filename = card.filename.clone();
            let number = card.number;
            let insert_at = to_row;
            column.cards.insert(insert_at, card);
            (filename, number, column.name.clone())
        };

        if !self.persist_card_order() {
            return Ok(Action::None);
        }
        self.rebuild_board();
        self.select_card_by_filename(&filename);
        self.status_msg = Some(format!("Reordered #{} in {}", number, column_name));
        Ok(Action::None)
    }

    /// Move the selected card within the active column by `delta` slots.
    pub(in crate::app) fn move_selected_within_column(&mut self, delta: isize) -> Result<Action> {
        let col = self.board.active_col;
        let column_name = if col < self.board.columns.len() {
            self.board.columns[col].name.clone()
        } else if col == self.board.columns.len() && self.board.show_mismatch {
            self.board.mismatch.name.clone()
        } else {
            return Ok(Action::None);
        };
        let (filename, number) = {
            let cards = if col < self.board.columns.len() {
                &mut self.board.columns[col].cards
            } else {
                &mut self.board.mismatch.cards
            };
            let len = cards.len();
            if len < 2 {
                return Ok(Action::None);
            }
            let from_row = self.board.selected;
            if from_row >= len {
                return Ok(Action::None);
            }
            let to_row = if delta < 0 {
                from_row.saturating_sub(delta.unsigned_abs())
            } else {
                usize::min(from_row + delta as usize, len - 1)
            };
            if to_row == from_row {
                return Ok(Action::None);
            }
            let card = cards.remove(from_row);
            let filename = card.filename.clone();
            let number = card.number;
            let insert_at = to_row;
            cards.insert(insert_at, card);
            (filename, number)
        };
        if !self.persist_card_order() {
            return Ok(Action::None);
        }
        self.rebuild_board();
        self.select_card_by_filename(&filename);
        self.status_msg = Some(format!(
            "Moved #{} {} in {}",
            number,
            if delta < 0 { "up" } else { "down" },
            column_name
        ));
        Ok(Action::None)
    }

    /// Open the action menu for the card the board is displaying, or for the
    /// selected card (tix #1744).
    ///
    /// When exactly one card is displayed, `Enter` targets **it** wherever the
    /// cursor happens to be — a `/` search that narrows the board to a single
    /// issue lands the cursor on an empty column, and requiring a navigation step
    /// before `Enter` does anything is the bug this fixes. With zero or several
    /// cards the cursor still decides, exactly as before.
    pub(in crate::app) fn open_card_action_menu(&mut self) -> Result<Action> {
        let (col, row) = self
            .board
            .sole_visible_card()
            .unwrap_or((self.board.active_col, self.board.selected));
        self.mouse.last_down = None;
        self.open_action_menu(Some(HitTarget::Card { col, row }), false)
    }

    #[allow(clippy::too_many_lines)]
    pub(in crate::app) fn handle_board_key(&mut self, key: KeyEvent) -> Result<Action> {
        if key
            .modifiers
            .contains(crossterm::event::KeyModifiers::CONTROL)
        {
            match key.code {
                KeyCode::Up => return self.move_selected_within_column(-1),
                KeyCode::Down => return self.move_selected_within_column(1),
                _ => {}
            }
        }
        match key.code {
            KeyCode::Char('q') | KeyCode::Char('Q') | KeyCode::Esc => {
                self.quit = true;
                Ok(Action::Quit)
            }
            KeyCode::Tab => {
                self.tabs.next();
                self.active_config = self.tabs.selected;
                self.switch_config();
                Ok(Action::None)
            }
            KeyCode::BackTab => {
                self.tabs.previous();
                self.active_config = self.tabs.selected;
                self.switch_config();
                Ok(Action::None)
            }
            KeyCode::Left | KeyCode::Char('h') => {
                self.board.move_left();
                Ok(Action::None)
            }
            KeyCode::Right | KeyCode::Char('l') => {
                self.board.move_right();
                Ok(Action::None)
            }
            KeyCode::Up | KeyCode::Char('k') => {
                self.board.move_up();
                Ok(Action::None)
            }
            KeyCode::Down | KeyCode::Char('j') => {
                self.board.move_down();
                Ok(Action::None)
            }
            KeyCode::Enter => self.open_card_action_menu(),
            KeyCode::Char('e') => {
                if let Some(card) = self.board.get_selected_card() {
                    Ok(Action::OpenEditor(card.filename.clone()))
                } else {
                    Ok(Action::None)
                }
            }
            // The mentions view (OpenSpec change `issue-mentions`). `i` is the
            // canonical event of `TuiAction::OpenMentions`, so a rebound chord
            // arrives here as `i`; the indicator row reads the chord back out of the
            // effective bindings and advertises whichever one is in force.
            KeyCode::Char('i') => {
                self.open_mentions();
                Ok(Action::None)
            }
            // The board's read-only viewer (#1507) is the **shifted** letter: the
            // plain `v` opens the saved-views modal (WP05) in the arm below, and
            // the Detail context keeps `v` for the viewer. See the board defaults
            // in `keybindings.rs` for why `v` went to saved views.
            KeyCode::Char('V') => {
                if let Some(card) = self.board.get_selected_card() {
                    Ok(Action::OpenViewer(card.filename.clone()))
                } else {
                    Ok(Action::None)
                }
            }
            KeyCode::Char('A') => {
                if let Some(card) = self.board.get_selected_card() {
                    Ok(Action::OpenAgent(card.filename.clone()))
                } else {
                    Ok(Action::None)
                }
            }
            KeyCode::Char('c') => {
                self.toggle_column_visibility();
                Ok(Action::None)
            }
            KeyCode::Char('f') => {
                self.open_filter_modal();
                Ok(Action::None)
            }
            // WP07 T031: `space` marks a card, `x` unmarks it, `X` empties the
            // selection. The **board** owns these, not the modal, because the
            // selection is made by standing on cards; a modal that swallowed the
            // board's keys would break every existing binding, which T031 forbids.
            //
            // Marking deliberately does **not** open the modal: the first `space`
            // used to raise the batch-edit modal, which made every later mark a
            // keystroke inside a surface the user did not ask for. The status line
            // carries the running count instead, and `B` opens the modal when the
            // user actually wants to act on the set.
            KeyCode::Char(' ') => {
                self.toggle_mark_selected();
                Ok(Action::None)
            }
            KeyCode::Char('x') => {
                self.unmark_selected_card();
                Ok(Action::None)
            }
            KeyCode::Char('X') => {
                self.clear_marks();
                Ok(Action::None)
            }
            KeyCode::Char('B') => {
                let action = self
                    .bulk
                    .as_ref()
                    .map(|m| m.action)
                    .unwrap_or(crate::ui::bulk::BatchAction::Edit);
                self.open_bulk_modal(action);
                Ok(Action::None)
            }
            KeyCode::Char('<') => {
                let real_cols = self.board.real_cols();
                if real_cols > 0 {
                    let target = if self.board.active_col == 0 || self.board.active_col >= real_cols
                    {
                        real_cols - 1
                    } else {
                        self.board.active_col - 1
                    };
                    self.move_selected_to(target)
                } else {
                    Ok(Action::None)
                }
            }
            KeyCode::Char('>') => {
                let real_cols = self.board.real_cols();
                if real_cols > 0 {
                    let target = if self.board.active_col >= real_cols {
                        0
                    } else {
                        (self.board.active_col + 1) % real_cols
                    };
                    self.move_selected_to(target)
                } else {
                    Ok(Action::None)
                }
            }
            KeyCode::Char('n') => {
                self.open_new_issue_form();
                Ok(Action::None)
            }
            KeyCode::Char('C') => {
                self.clone_selected_into_form();
                Ok(Action::None)
            }
            // #1492: show the archived issues too, or hide them again. Off by
            // default and *reloaded* rather than filtered on demand: the archived
            // files are not in the corpus until this is on, which is what keeps
            // opening a board in a repository full of them cheap.
            KeyCode::Char('a') => {
                self.show_archived = !self.show_archived;
                self.refresh_corpus()?;
                self.status_msg = Some(
                    if self.show_archived {
                        "Showing archived issues"
                    } else {
                        "Hiding archived issues"
                    }
                    .to_string(),
                );
                Ok(Action::None)
            }
            // #1399: show each issue's sub-issues beneath it, or hide them again.
            // Display-only: the children are already in the board state, so this
            // reorders the columns (one level deep) on a rebuild rather than
            // re-reading the store — the archive toggle's reload would be wasted work.
            KeyCode::Char('u') => {
                self.show_children = !self.show_children;
                self.rebuild_board();
                self.status_msg = Some(
                    if self.show_children {
                        "Showing sub-issues"
                    } else {
                        "Hiding sub-issues"
                    }
                    .to_string(),
                );
                Ok(Action::None)
            }
            // tix #1442 (follow-up): a page of cards. The column scrolls itself to keep
            // the selection visible — the `List` does that — so a page step is a
            // selection jump by one screen, measured by the renderer.
            //
            // These keys were **unbound** on the board until now, and an unbound key in
            // a non-text context is rewritten to `F(12)` before the handler sees it, so
            // `PgUp`/`PgDn` did nothing at all while the wheel next to them worked. A
            // key that silently disappears is worse than one that is not advertised.
            KeyCode::PageDown => {
                self.move_selection_by_page(1);
                Ok(Action::None)
            }
            KeyCode::PageUp => {
                self.move_selection_by_page(-1);
                Ok(Action::None)
            }
            KeyCode::Char('d') => {
                if let Some(card) = self.board.get_selected_card().cloned() {
                    self.confirm_delete_target = Some(card.filename);
                    self.mode = Mode::ConfirmDelete;
                }
                Ok(Action::None)
            }
            KeyCode::Char('r') => {
                self.refresh_corpus()?;
                self.status_msg = Some("Refreshed".to_string());
                Ok(Action::None)
            }
            KeyCode::Char('s') => {
                self.open_settings(None);
                Ok(Action::None)
            }
            // WP06, T029. `t` was unbound, so this adds a key rather than
            // changing what an existing one means — the escalation this
            // mission is told to avoid is an *unrelated* navigation change,
            // and this one is the triage surface's own entry point.
            KeyCode::Char('t') => self.open_triage_inbox(),
            // WP05. `v` was unbound, so this adds a key rather than changing what
            // an existing one means (T024), and it is rebound through
            // `keybindings.board.views` like every other board key.
            KeyCode::Char('v') => {
                self.open_views();
                Ok(Action::None)
            }
            KeyCode::Char('m') | KeyCode::Char('M') => {
                self.open_planning_modal();
                Ok(Action::None)
            }
            KeyCode::Char('b') => {
                self.open_settings(Some(SettingsPrompt::NewBoard(String::new())));
                Ok(Action::None)
            }
            KeyCode::Char('?') => {
                self.open_help(Mode::Board);
                Ok(Action::None)
            }
            KeyCode::Char('/') => {
                let buffer = self.filter.clone().unwrap_or_default();
                self.mode = Mode::Filter { buffer };
                Ok(Action::None)
            }
            _ => Ok(Action::None),
        }
    }

    /// Duplicate the selected issue into the create-issue form, prefilled
    /// (tix #1484). The source is resolved through the same selector path the CLI
    /// uses, so fields the card projection does not carry are copied too.
    pub(in crate::app) fn clone_selected_into_form(&mut self) {
        let Some(card) = self.board.get_selected_card().cloned() else {
            self.status_msg = Some("No issue selected to clone".to_string());
            return;
        };
        match crate::commands::view::get(&self.store, &card.filename) {
            Ok(issue) => {
                self.status_msg = Some(format!("Cloning #{}", issue.number));
                let entry = self.new_issue_target_status(NewIssueTarget::Triage);
                let mut form = FormState::from_issue(&issue);
                if issue.status.to_string().trim() == entry {
                    form.target = NewIssueTarget::Triage;
                }
                self.enter_form(form);
            }
            Err(err) => self.status_msg = Some(format!("Cannot clone: {err}")),
        }
    }

    /// The single entry point for a visible-column move (`<`/`>`, drag-and-drop).
    pub(in crate::app) fn move_selected_to(&mut self, target_col: usize) -> Result<Action> {
        self.start_move(MoveTarget::Visible(target_col))
    }

    /// Start a move to a named configured column (the action dialog's path).
    ///
    /// When the card under the cursor is part of a multi-selection, the move
    /// covers **every** marked issue; otherwise it is the single card. The batch
    /// keeps the selection afterwards, so a user can move a set and then apply
    /// the next action to the same set.
    pub(in crate::app) fn start_move(&mut self, target: MoveTarget) -> Result<Action> {
        let Some(card) = self.board.get_selected_card().cloned() else {
            return Ok(Action::None);
        };
        let target_name = target.name(&self.board);
        let numbers = self.move_numbers(card.number);
        self.pending_move = Some(PendingMove {
            numbers,
            target,
            target_name,
            reason: None,
            acknowledged: false,
            commit: None,
        });
        self.advance_move()
    }

    /// The issues a move started on `anchor` should cover: the whole marked set
    /// when the anchor is marked and the set has more than one issue, otherwise
    /// just the anchor.
    fn move_numbers(&self, anchor: u32) -> Vec<u32> {
        match &self.bulk {
            Some(modal) if modal.selection.len() > 1 && modal.selection.contains(anchor) => {
                modal.selection.numbers().to_vec()
            }
            _ => vec![anchor],
        }
    }

    /// Run the shared move with the answers collected so far.
    ///
    /// The order is the documented one and matches `commands::mv::run`: the
    /// blocked-move guard first (an acknowledgement must not be asked for after
    /// a reason or a commit hash), then the transition policy, then the WIP
    /// policy, then the commit prompt. Every prompt stores its answer in
    /// [`App::pending_move`] and calls back here, so no prompt discards another
    /// prompt's answer.
    ///
    /// A batch asks each question **once** and applies the answer to the whole
    /// set: all items move to the same column, so they share that column's limit
    /// and one reason/acknowledgement/commit is the same decision for each. The
    /// per-item outcomes are collected and reported together; a refused item
    /// never rolls back the ones already applied.
    #[allow(clippy::too_many_lines)]
    pub(in crate::app) fn advance_move(&mut self) -> Result<Action> {
        use crate::wip::WipOutcome;
        use crate::workflow::{TransitionOutcome, WorkflowCategory};

        let Some(pending) = self.pending_move.clone() else {
            return Ok(Action::None);
        };
        if pending.numbers.is_empty() {
            self.finish_move();
            return Ok(Action::None);
        }

        let target_name = pending.target_name.clone();
        let (_, resolution) = crate::workflow::active_resolution(&self.store.config);
        let is_done_target = resolution
            .resolve(&target_name)
            .is_some_and(WorkflowCategory::is_complete);

        // Resolve the batch once. A number that no longer resolves is dropped and
        // reported; the rest still move, which is the same partial-batch rule the
        // CLI and the batch modal use.
        let mut issues = Vec::with_capacity(pending.numbers.len());
        let mut missing = 0usize;
        for number in &pending.numbers {
            match self.store.get(IssueSelector::Number(*number)) {
                Ok(issue) => issues.push(issue),
                Err(_) => missing += 1,
            }
        }
        if issues.is_empty() {
            self.finish_move();
            self.status_msg = Some("Move: none of the selected issues still exist".to_string());
            return Ok(Action::None);
        }

        // 1. Blocked-move guard. One acknowledgement covers the batch; the
        //    decision is recorded per issue by the shared apply.
        if !pending.acknowledged {
            let mut blocked = Vec::new();
            for issue in &issues {
                let guard =
                    mv::blocked_move_guard(&self.store.config, &self.store, issue, &target_name)?;
                if guard.needs_acknowledgement() {
                    blocked.push(guard.warning().unwrap_or_default());
                }
            }
            if let Some(first) = blocked.first() {
                let warning = if issues.len() > 1 {
                    format!(
                        "{} of {} selected issues are blocked. {first}",
                        blocked.len(),
                        issues.len()
                    )
                } else {
                    first.clone()
                };
                self.mode = Mode::ConfirmBlockedMove { warning };
                return Ok(Action::None);
            }
        }

        // 2. Transition policy. One reason covers the batch.
        if pending.reason.is_none() {
            for issue in &issues {
                if let TransitionOutcome::Rejected(diagnostic) =
                    crate::workflow::validate_transition(
                        issue,
                        &target_name,
                        &resolution,
                        &self.store.config,
                        None,
                    )
                {
                    self.mode = Mode::TransitionReason {
                        reason: diagnostic.to_string(),
                        buffer: String::new(),
                    };
                    return Ok(Action::None);
                }
            }
        }

        // 3. WIP policy. Every item targets one column, so one override reason
        //    authorizes the same limit; asking once is the same decision.
        if self.pending_wip_override.is_none() {
            for issue in &issues {
                if let Some(decision) =
                    self.wip_decision(issue.number, &target_name, pending.reason.as_deref(), None)
                    && decision.outcome == WipOutcome::Block
                {
                    self.wip_override = Some(crate::ui::wip_override::WipOverridePrompt {
                        number: issue.number,
                        count: issues.len(),
                        target_move: pending.target.clone(),
                        target: target_name.clone(),
                        decision,
                    });
                    self.mode = Mode::WipOverride {
                        buffer: String::new(),
                    };
                    return Ok(Action::None);
                }
            }
        }

        // 4. Commit prompt. Answered once for the batch; an empty answer records
        //    no hash on the items that reach completion.
        if is_done_target && pending.commit.is_none() {
            let needs_commit = issues.iter().any(|issue| {
                let was_done = resolution
                    .resolve(&issue.status.to_string())
                    .is_some_and(WorkflowCategory::is_complete);
                !was_done && issue.commit.is_none()
            });
            if needs_commit {
                self.mode = Mode::MoveIntoDone {
                    buffer: String::new(),
                };
                return Ok(Action::None);
            }
        }

        // 5. Apply each item with the collected answers.
        let mut moved = Vec::new();
        let mut refusals: Vec<(u32, String)> = Vec::new();
        let mut wip_note: Option<String> = None;
        for issue in &issues {
            let was_done = resolution
                .resolve(&issue.status.to_string())
                .is_some_and(WorkflowCategory::is_complete);
            let commit = if was_done {
                None
            } else {
                match &pending.commit {
                    Some(answered) => answered.clone(),
                    None => issue.commit.clone(),
                }
            };

            let (wip_event, item_note) = match self.wip_decision(
                issue.number,
                &target_name,
                pending.reason.as_deref(),
                self.pending_wip_override.as_ref(),
            ) {
                Some(decision) => match decision.outcome {
                    WipOutcome::Allow => (None, None),
                    WipOutcome::Warn => (None, Some(crate::wip::render_decision(&decision))),
                    WipOutcome::Override => (decision.history.clone(), None),
                    WipOutcome::Rejected
                        if decision.diagnostics.first().is_some_and(|diagnostic| {
                            diagnostic.kind == crate::wip::WipDiagnosticKind::RejectedTransition
                        }) =>
                    {
                        (None, None)
                    }
                    WipOutcome::Block | WipOutcome::Rejected => {
                        refusals.push((issue.number, crate::wip::render_decision(&decision)));
                        continue;
                    }
                },
                None => (None, None),
            };
            if wip_note.is_none() {
                wip_note = item_note;
            }

            match mv::apply_guarded(
                &self.store.config,
                &self.store,
                &issue.filename,
                &target_name,
                commit.as_deref(),
                pending.reason.as_deref(),
                pending.acknowledged,
                wip_event.as_ref(),
            ) {
                Ok(outcome) => {
                    moved.push((issue.number, outcome.acknowledged));
                    // The next item's WIP decision counts the column occupancy
                    // **after** this write. Without the refresh, a batch could
                    // authorize two items against the same free slot.
                    self.refresh_corpus()?;
                }
                Err(error) => refusals.push((issue.number, error.to_string())),
            }
        }

        self.finish_move();
        self.refresh_corpus()?;
        if let Some(index) = pending.target.visible_index() {
            self.board.select_column(index);
        }

        if pending.numbers.len() == 1 && refusals.is_empty() && missing == 0 {
            let (number, acknowledged) = moved.first().copied().unwrap_or((0, false));
            let ack = if acknowledged {
                ", blocked move acknowledged"
            } else {
                ""
            };
            let commit_note = match &pending.commit {
                Some(Some(hash)) => format!(" (commit: {hash}{ack})"),
                Some(None) => format!(" (no commit recorded{ack})"),
                None => String::new(),
            };
            self.status_msg = Some(match wip_note {
                Some(note) => format!("{note}\nMoved #{number} to {target_name}{commit_note}"),
                None => format!("Moved #{number} to {target_name}{commit_note}"),
            });
        } else {
            let mut message = format!(
                "Moved {} of {} to {target_name}",
                moved.len(),
                pending.numbers.len()
            );
            if let Some((number, reason)) = refusals.first() {
                let head = reason.lines().next().unwrap_or_default();
                message.push_str(&format!("; {} refused (#{number}: {head})", refusals.len()));
            }
            if missing > 0 {
                message.push_str(&format!("; {missing} missing"));
            }
            self.status_msg = Some(message);
        }
        Ok(Action::None)
    }

    /// Drop a move that is finished or cancelled, and the WIP authorization it
    /// may have carried.
    pub(in crate::app) fn finish_move(&mut self) {
        self.pending_move = None;
        self.pending_wip_override = None;
    }

    /// The reasoned-override prompt's key handler.
    ///
    /// Enter accepts a **non-blank** reason; Esc cancels. A blank reason is refused
    /// rather than accepted, because a whitespace-only string is not a reason and the
    /// service trims it away — accepting it here would show the user a move that
    /// then fails at the seam, having already closed the prompt.
    ///
    /// Cancelling returns to the board with **nothing** written: no file, no
    /// `updated` bump, no History entry. The move was never applied, so there is
    /// nothing to undo.
    pub(in crate::app) fn handle_transition_reason_key(&mut self, key: KeyEvent) -> Result<Action> {
        match key.code {
            KeyCode::Enter => {
                let reason = match &self.mode {
                    Mode::TransitionReason { buffer, .. } => buffer.clone(),
                    _ => String::new(),
                };
                if reason.trim().is_empty() {
                    self.status_msg = Some(
                        "A reason is required: the decision is recorded in the issue's \
                         history and has to say why"
                            .to_string(),
                    );
                    return Ok(Action::None);
                }
                // Store the reason and resume the shared move: the guard, the
                // policy check, the commit prompt and the write run again, and the
                // answers collected by the other prompts are still there.
                if let Some(pending) = self.pending_move.as_mut() {
                    pending.reason = Some(reason);
                }
                self.mode = Mode::Board;
                self.advance_move()
            }
            KeyCode::Esc => {
                self.finish_move();
                self.mode = Mode::Board;
                Ok(Action::None)
            }
            KeyCode::Char(c) => {
                if let Mode::TransitionReason { ref mut buffer, .. } = self.mode {
                    buffer.push(c);
                }
                Ok(Action::None)
            }
            KeyCode::Backspace => {
                if let Mode::TransitionReason { ref mut buffer, .. } = self.mode {
                    buffer.pop();
                }
                Ok(Action::None)
            }
            _ => Ok(Action::None),
        }
    }

    /// The optional commit prompt for a move into a completion column.
    ///
    /// The answer is stored on [`App::pending_move`] and the shared move resumes;
    /// it no longer writes on its own, which is what dropped the transition reason
    /// and hard-coded the acknowledgement before.
    pub(in crate::app) fn handle_move_into_done_key(&mut self, key: KeyEvent) -> Result<Action> {
        match key.code {
            KeyCode::Enter => {
                let buffer = match &self.mode {
                    Mode::MoveIntoDone { buffer, .. } => buffer.clone(),
                    _ => String::new(),
                };
                let trimmed = buffer.trim();
                if let Some(pending) = self.pending_move.as_mut() {
                    pending.commit = Some(if trimmed.is_empty() {
                        None
                    } else {
                        Some(trimmed.to_string())
                    });
                }
                self.mode = Mode::Board;
                self.advance_move()
            }
            KeyCode::Esc => {
                // The move is abandoned, so the override it may have been authorized
                // with is abandoned with it: leaving it pending would authorize the
                // *next* move to that column.
                self.finish_move();
                self.mode = Mode::Board;
                Ok(Action::None)
            }
            KeyCode::Char(c) => {
                if let Mode::MoveIntoDone { ref mut buffer, .. } = self.mode {
                    buffer.push(c);
                }
                Ok(Action::None)
            }
            KeyCode::Backspace => {
                if let Mode::MoveIntoDone { ref mut buffer, .. } = self.mode {
                    buffer.pop();
                }
                Ok(Action::None)
            }
            _ => Ok(Action::None),
        }
    }

    /// Move the board selection by one screen of cards (tix #1442 follow-up).
    ///
    /// A no-op before the first draw (nothing has reported a page yet) and in an empty
    /// column (the renderer reports zero, because there is nothing to page).
    pub(in crate::app) fn move_selection_by_page(&mut self, direction: i32) {
        let page = self.board_page.get();
        if page == 0 {
            return;
        }
        let step = i32::try_from(page).unwrap_or(i32::MAX);
        self.board.move_selection_by(step * direction);
    }

    /// Toggle column visibility on the active column (FR-005/FR-006/NFR-004/
    /// SC-003). Updates the in-memory config and persists atomically.
    pub(in crate::app) fn toggle_column_visibility(&mut self) {
        let col_name = self.board.active_column_name().to_string();
        let config_name = self.tabs.names[self.active_config].clone();
        let board_config = self
            .store
            .config
            .kanban
            .configurations
            .get_mut(&config_name);
        let board_config = match board_config {
            Some(bc) => bc,
            None => {
                self.status_msg = Some("toggle: config not found".into());
                return;
            }
        };
        let now_hidden = if let Some(pos) = board_config
            .hidden_columns
            .iter()
            .position(|h| h == &col_name)
        {
            board_config.hidden_columns.remove(pos);
            false
        } else {
            board_config.hidden_columns.push(col_name.clone());
            true
        };
        match self.store.config_path() {
            Ok(path) => {
                if let Err(e) = self.store.config.save(&path) {
                    self.status_msg = Some(format!("toggle save: {e}"));
                    return;
                }
            }
            Err(e) => {
                self.status_msg = Some(format!("toggle path: {e}"));
                return;
            }
        }
        // The user changed visibility by hand, so the applied view's visibility
        // snapshot stops being the live board's visibility (WP05, T025/C-006) —
        // dropped **before** the rebuild, because a rebuild that re-applied the
        // snapshot would make the toggle look like it did nothing. The **marker**
        // stays: the board is still associated with that view, and the divergence
        // report now names the difference instead of hiding it.
        if let Some(session) = self.view_session.as_mut() {
            session.visibility = false;
        }
        self.rebuild_board();
        // Keep the cursor logically on the toggled column so a second `c`
        // press re-shows it: visible index when shown, hidden-region index
        // while hidden. Navigation keys still skip hidden columns (T014).
        let visible = self.board.columns.len();
        self.board.active_col = if now_hidden {
            visible
                + self
                    .board
                    .hidden
                    .iter()
                    .position(|c| c.name == col_name)
                    .unwrap_or_default()
        } else {
            self.board
                .columns
                .iter()
                .position(|c| c.name == col_name)
                .unwrap_or_default()
        };
        self.board.clamp_selection();
        self.status_msg = Some(format!("Toggled '{col_name}' visibility"));
    }

    /// Switch the active board configuration (Tab/BackTab). Rebuilds the
    /// board through the same path as `rebuild_board` so filters re-apply to
    /// the new config's visible columns, resetting `active_col` to the first
    /// visible column while keeping the selected card if it is still visible.
    /// Switch to the named board at tab index `i` — the exact Tab/BackTab
    /// path (set `selected`, then `active_config`, then rebuild via
    /// [`App::switch_config`]). Used by the mouse-hit `Action::SwitchBoard`
    /// and the run loop; tabs need a single shared transition.
    pub(in crate::app) fn switch_board(&mut self, index: usize) {
        if index < self.tabs.len() {
            self.tabs.selected = index;
            self.tabs.hovered = None;
            self.active_config = index;
            self.switch_config();
        }
    }

    pub(in crate::app) fn switch_config(&mut self) {
        let selected_filename = self.board.get_selected_card().map(|c| c.filename.clone());
        self.rebuild_board();
        self.board.active_col = 0;
        if let Some(filename) = selected_filename
            && self
                .board
                .column_cards(0)
                .iter()
                .any(|c| c.filename == filename)
        {
            self.board.selected = self
                .board
                .column_cards(0)
                .iter()
                .position(|c| c.filename == filename)
                .unwrap_or(0);
        } else {
            self.board.selected = 0;
        }
        self.board.clamp_selection();
        self.status_msg = Some("Switched board".to_string());
    }

    /// Activate a rail **branch**: switch the shell to the branch's target,
    /// resolved by the same paths the mode's own controls use.
    ///
    /// One method per [`Action`] arm, so a branch click and a branch-only
    /// keyboard activation (there is none today; branches are pointer-only per
    /// the open-question-3 decision) share a single transition.
    pub fn activate_branch(&mut self, action: &Action) -> Result<Action> {
        match action {
            Action::SelectBoard(name) => self.select_board_branch(name),
            Action::SelectCycle(name) => self.select_cycle_branch(name),
            Action::SelectMilestone(name) => self.select_milestone_branch(name),
            Action::NewFromTemplate(name) => self.new_from_template(name),
            _ => Ok(Action::None),
        }
    }

    /// Switch the active board to the named configuration and show the Board
    /// mode (open question 2: the branch switches the mode too, so the result of
    /// the switch is what the user sees rather than a board changing off-screen).
    pub(in crate::app) fn select_board_branch(&mut self, name: &str) -> Result<Action> {
        let index = self
            .store
            .config
            .configs()
            .position(|(candidate, _)| candidate == name);
        let Some(index) = index else {
            self.status_msg = Some(format!("Board '{name}' not found"));
            return Ok(Action::None);
        };
        self.switch_top_mode(TopMode::Board)?;
        self.switch_board(index);
        Ok(Action::None)
    }

    /// Enter the Cycle mode with its cursor on the named cycle.
    ///
    /// The index is a position in the mode's **rendered** flat order, the same
    /// space [`crate::ui::cycle::flat_entries`] and every other cursor write
    /// use; a position in the config's insertion order would land on a
    /// different cycle whenever the two disagree, which is most of the time.
    pub(in crate::app) fn select_cycle_branch(&mut self, name: &str) -> Result<Action> {
        self.switch_top_mode(TopMode::Cycle)?;
        let groups = self.cycle_groups();
        let index = crate::ui::cycle::flat_entries(&groups)
            .iter()
            .position(|entry| entry.name == name);
        if let (Some(index), Some(state)) = (index, self.cycle_state.as_mut()) {
            state.selected = index;
        }
        Ok(Action::None)
    }

    /// Enter the Milestones mode with its cursor on the named milestone.
    pub(in crate::app) fn select_milestone_branch(&mut self, name: &str) -> Result<Action> {
        self.switch_top_mode(TopMode::Milestones)?;
        let (_cycles, milestones) = self.planning_rows();
        let index = milestones
            .iter()
            .position(|row| row.name == name)
            .unwrap_or(0);
        if let Some(modal) = self.planning.as_mut() {
            modal.segment = PlanningSegment::Milestones;
            modal.selected = index;
            modal.prompt = None;
        }
        Ok(Action::None)
    }

    /// Open the New Issue form seeded from the named `[templates.<name>]`
    /// record, entering the New Issue mode first (the form is that mode's
    /// content).
    pub(in crate::app) fn new_from_template(&mut self, name: &str) -> Result<Action> {
        self.switch_top_mode(TopMode::NewIssue)?;
        self.select_template(name);
        Ok(Action::None)
    }
}