Implement the password-store tree sidebar

apps/tui/src/action.rs

@@ -11,6 +11,19 @@ pub enum Action {
     Command,
     Cancel,
     Lock,
+    Refresh,
+    Next,
+    Previous,
+    PageDown,
+    PageUp,
+    First,
+    Last,
+    Parent,
+    Child,
+    Activate,
+    Filter,
+    NextMatch,
+    PreviousMatch,
     FocusNext,
     FocusPrevious,
 }
@@ -27,7 +40,7 @@ pub struct ActionSpec {
     pub action: Action,
     pub label: &'static str,
     pub command: &'static str,
-    pub binding: KeyBinding,
+    pub bindings: &'static [KeyBinding],
     modes: &'static [Mode],
 }
 
@@ -51,82 +64,163 @@ const ALL: &[Mode] = &[
     Mode::Locked,
 ];
 
+macro_rules! keys {
+    ($(($code:expr, $modifiers:expr, $display:expr)),+ $(,)?) => {
+        &[$(KeyBinding { code: $code, modifiers: $modifiers, display: $display }),+]
+    };
+}
+
 pub static ACTIONS: &[ActionSpec] = &[
     ActionSpec {
         action: Action::Quit,
         label: "quit",
         command: "quit",
-        binding: KeyBinding {
+        bindings: keys!((KeyCode::Char('q'), KeyModifiers::NONE, "q")),
-            code: KeyCode::Char('q'),
-            modifiers: KeyModifiers::NONE,
-            display: "q",
-        },
         modes: BROWSER_LIKE,
     },
     ActionSpec {
         action: Action::Help,
         label: "help",
         command: "help",
-        binding: KeyBinding {
+        bindings: keys!((KeyCode::Char('?'), KeyModifiers::NONE, "?")),
-            code: KeyCode::Char('?'),
-            modifiers: KeyModifiers::NONE,
-            display: "?",
-        },
         modes: UNLOCKED,
     },
     ActionSpec {
         action: Action::Command,
         label: "command",
         command: "command",
-        binding: KeyBinding {
+        bindings: keys!((KeyCode::Char(':'), KeyModifiers::NONE, ":")),
-            code: KeyCode::Char(':'),
-            modifiers: KeyModifiers::NONE,
-            display: ":",
-        },
         modes: UNLOCKED,
     },
     ActionSpec {
         action: Action::Cancel,
         label: "back",
         command: "cancel",
-        binding: KeyBinding {
+        bindings: keys!((KeyCode::Esc, KeyModifiers::NONE, "Esc")),
-            code: KeyCode::Esc,
-            modifiers: KeyModifiers::NONE,
-            display: "Esc",
-        },
         modes: OVERLAYS,
     },
     ActionSpec {
         action: Action::Lock,
         label: "lock",
         command: "lock",
-        binding: KeyBinding {
+        bindings: keys!((KeyCode::Char('l'), KeyModifiers::CONTROL, "C-l")),
-            code: KeyCode::Char('l'),
-            modifiers: KeyModifiers::CONTROL,
-            display: "C-l",
-        },
         modes: UNLOCKED,
     },
+    ActionSpec {
+        action: Action::Refresh,
+        label: "refresh",
+        command: "refresh",
+        bindings: keys!((KeyCode::Char('r'), KeyModifiers::NONE, "r")),
+        modes: BROWSER_LIKE,
+    },
+    ActionSpec {
+        action: Action::Next,
+        label: "next",
+        command: "next",
+        bindings: keys!(
+            (KeyCode::Char('j'), KeyModifiers::NONE, "j"),
+            (KeyCode::Down, KeyModifiers::NONE, "↓"),
+        ),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::Previous,
+        label: "previous",
+        command: "previous",
+        bindings: keys!(
+            (KeyCode::Char('k'), KeyModifiers::NONE, "k"),
+            (KeyCode::Up, KeyModifiers::NONE, "↑"),
+        ),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::PageDown,
+        label: "page down",
+        command: "page-down",
+        bindings: keys!((KeyCode::PageDown, KeyModifiers::NONE, "PgDn")),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::PageUp,
+        label: "page up",
+        command: "page-up",
+        bindings: keys!((KeyCode::PageUp, KeyModifiers::NONE, "PgUp")),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::First,
+        label: "first",
+        command: "first",
+        bindings: keys!((KeyCode::Home, KeyModifiers::NONE, "Home")),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::Last,
+        label: "last",
+        command: "last",
+        bindings: keys!((KeyCode::End, KeyModifiers::NONE, "End")),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::Parent,
+        label: "parent",
+        command: "parent",
+        bindings: keys!(
+            (KeyCode::Char('h'), KeyModifiers::NONE, "h"),
+            (KeyCode::Left, KeyModifiers::NONE, "←"),
+        ),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::Child,
+        label: "child",
+        command: "child",
+        bindings: keys!(
+            (KeyCode::Char('l'), KeyModifiers::NONE, "l"),
+            (KeyCode::Right, KeyModifiers::NONE, "→"),
+        ),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::Activate,
+        label: "open/toggle",
+        command: "open",
+        bindings: keys!((KeyCode::Enter, KeyModifiers::NONE, "Enter")),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::Filter,
+        label: "filter",
+        command: "filter",
+        bindings: keys!((KeyCode::Char('/'), KeyModifiers::NONE, "/")),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::NextMatch,
+        label: "next match",
+        command: "next-match",
+        bindings: keys!((KeyCode::Char('n'), KeyModifiers::NONE, "n")),
+        modes: &[Mode::Browser],
+    },
+    ActionSpec {
+        action: Action::PreviousMatch,
+        label: "previous match",
+        command: "previous-match",
+        bindings: keys!((KeyCode::Char('N'), KeyModifiers::SHIFT, "N")),
+        modes: &[Mode::Browser],
+    },
     ActionSpec {
         action: Action::FocusNext,
         label: "next pane",
         command: "focus-next",
-        binding: KeyBinding {
+        bindings: keys!((KeyCode::Tab, KeyModifiers::NONE, "Tab")),
-            code: KeyCode::Tab,
-            modifiers: KeyModifiers::NONE,
-            display: "Tab",
-        },
         modes: UNLOCKED,
     },
     ActionSpec {
         action: Action::FocusPrevious,
         label: "previous pane",
         command: "focus-previous",
-        binding: KeyBinding {
+        bindings: keys!((KeyCode::BackTab, KeyModifiers::SHIFT, "S-Tab")),
-            code: KeyCode::BackTab,
-            modifiers: KeyModifiers::SHIFT,
-            display: "S-Tab",
-        },
         modes: UNLOCKED,
     },
 ];
@@ -136,8 +230,10 @@ pub fn resolve_key(mode: Mode, code: KeyCode, modifiers: KeyModifiers) -> Option
         .iter()
         .find(|spec| {
             spec.is_available(mode)
-                && spec.binding.code == code
+                && spec
-                && spec.binding.modifiers == modifiers
+                    .bindings
+                    .iter()
+                    .any(|binding| binding.code == code && binding.modifiers == modifiers)
         })
         .map(|spec| spec.action)
 }
@@ -160,7 +256,11 @@ mod tests {
                 assert_ne!(action.command, other.command);
                 for mode in ALL {
                     if action.is_available(*mode) && other.is_available(*mode) {
-                        assert_ne!(action.binding, other.binding);
+                        for binding in action.bindings {
+                            for other_binding in other.bindings {
+                                assert_ne!(binding, other_binding);
+                            }
+                        }
                     }
                 }
             }
@@ -171,12 +271,14 @@ mod tests {
     fn resolution_and_help_consume_the_same_registry() {
         for mode in ALL {
             for spec in available_actions(*mode) {
+                for binding in spec.bindings {
                     assert_eq!(
-                    resolve_key(*mode, spec.binding.code, spec.binding.modifiers),
+                        resolve_key(*mode, binding.code, binding.modifiers),
                         Some(spec.action)
                     );
                 }
             }
+        }
         assert_eq!(
             resolve_key(Mode::Editor, KeyCode::Char('q'), KeyModifiers::NONE),
             None

apps/tui/src/app.rs

@@ -2,7 +2,15 @@
 
 use std::collections::BTreeSet;
 
-use crate::action::Action;
+use ironstorage::{
+    config::Config,
+    read::{FindResults, TreeModel},
+};
+
+use crate::{
+    action::Action,
+    sidebar::{Sidebar, SidebarIntent},
+};
 
 #[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
 pub enum Mode {
@@ -41,15 +49,16 @@ pub struct RequestToken {
 }
 
 #[derive(Clone, Debug, Eq, PartialEq)]
-pub struct StartupSummary {
+pub struct StartupData {
-    pub configuration: String,
+    pub config: Config,
-    pub vault: String,
+    pub tree: TreeModel,
 }
 
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub enum AsyncPayload {
-    Startup(StartupSummary),
+    Startup(StartupData),
-    Refreshed,
+    Refreshed(TreeModel),
+    Filtered { query: String, results: FindResults },
 }
 
 #[derive(Clone, Debug, Eq, PartialEq)]
@@ -64,13 +73,21 @@ pub enum ResultDisposition {
     Stale,
 }
 
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub enum AppEffect {
+    None,
+    RefreshTree,
+}
+
 #[derive(Debug)]
 pub struct App {
     mode: Mode,
     suspended_mode: Option<Mode>,
     focus: PaneFocus,
     status: String,
-    startup: Option<StartupSummary>,
+    config: Option<Config>,
+    sidebar: Sidebar,
+    selected_entry: Option<String>,
     terminal_size: (u16, u16),
     ticks: u64,
     should_quit: bool,
@@ -92,7 +109,9 @@ impl App {
             suspended_mode: None,
             focus: PaneFocus::Sidebar,
             status: "Starting…".to_owned(),
-            startup: None,
+            config: None,
+            sidebar: Sidebar::default(),
+            selected_entry: None,
             terminal_size: (0, 0),
             ticks: 0,
             should_quit: false,
@@ -114,8 +133,20 @@ impl App {
         &self.status
     }
 
-    pub fn startup(&self) -> Option<&StartupSummary> {
+    pub fn config(&self) -> Option<&Config> {
-        self.startup.as_ref()
+        self.config.as_ref()
+    }
+
+    pub fn sidebar(&self) -> &Sidebar {
+        &self.sidebar
+    }
+
+    pub fn sidebar_mut(&mut self) -> &mut Sidebar {
+        &mut self.sidebar
+    }
+
+    pub fn selected_entry(&self) -> Option<&str> {
+        self.selected_entry.as_deref()
     }
 
     pub fn terminal_size(&self) -> (u16, u16) {
@@ -136,6 +167,14 @@ impl App {
 
     pub fn resize(&mut self, width: u16, height: u16) {
         self.terminal_size = (width, height);
+        let content_height = height.saturating_sub(3) as usize;
+        let sidebar_height = if width < 80 {
+            content_height.saturating_mul(40) / 100
+        } else {
+            content_height
+        };
+        self.sidebar
+            .set_viewport_height(sidebar_height.saturating_sub(2));
     }
 
     pub fn tick(&mut self) {
@@ -152,22 +191,37 @@ impl App {
         token
     }
 
+    pub fn begin_latest_request(&mut self) -> RequestToken {
+        self.invalidate_requests();
+        self.begin_request()
+    }
+
     pub fn apply_result(&mut self, result: AsyncResult) -> ResultDisposition {
         if result.token.generation != self.generation || !self.pending.remove(&result.token.id) {
             return ResultDisposition::Stale;
         }
         match result.payload {
-            Ok(AsyncPayload::Startup(summary)) => {
+            Ok(AsyncPayload::Startup(startup)) => {
-                self.status = format!("Vault: {}", summary.vault);
+                self.status = format!("Vault: {}", startup.config.vault().display());
-                self.startup = Some(summary);
+                self.sidebar.replace_tree(&startup.tree);
+                self.config = Some(startup.config);
+            }
+            Ok(AsyncPayload::Refreshed(tree)) => {
+                self.sidebar.replace_tree(&tree);
+                self.status = "Password store refreshed".to_owned();
+            }
+            Ok(AsyncPayload::Filtered { query, results }) => {
+                if !self.sidebar.apply_filter_results(&query, &results) {
+                    return ResultDisposition::Stale;
+                }
+                self.status = format!("Filter: {query} ({} matches)", results.matches().len());
             }
-            Ok(AsyncPayload::Refreshed) => self.status = "Password store refreshed".to_owned(),
             Err(error) => self.status = error,
         }
         ResultDisposition::Applied
     }
 
-    pub fn dispatch(&mut self, action: Action) {
+    pub fn dispatch(&mut self, action: Action) -> AppEffect {
         match action {
             Action::Quit if matches!(self.mode, Mode::Browser | Mode::Viewer) => {
                 self.should_quit = true;
@@ -184,6 +238,24 @@ impl App {
             Action::Lock => {
                 self.transition(Transition::Lock);
             }
+            Action::Refresh => return AppEffect::RefreshTree,
+            Action::Next => self.sidebar.move_next(),
+            Action::Previous => self.sidebar.move_previous(),
+            Action::PageDown => self.sidebar.page_down(),
+            Action::PageUp => self.sidebar.page_up(),
+            Action::First => self.sidebar.move_first(),
+            Action::Last => self.sidebar.move_last(),
+            Action::Parent => self.sidebar.collapse_or_parent(),
+            Action::Child => self.sidebar.move_child(),
+            Action::Activate => {
+                if let SidebarIntent::OpenEntry(path) = self.sidebar.activate() {
+                    self.selected_entry = Some(path);
+                    self.transition(Transition::OpenEntry);
+                }
+            }
+            Action::Filter => self.sidebar.begin_filter(),
+            Action::NextMatch => self.sidebar.next_match(),
+            Action::PreviousMatch => self.sidebar.previous_match(),
             Action::FocusNext | Action::FocusPrevious => {
                 self.focus = match self.focus {
                     PaneFocus::Sidebar => PaneFocus::Main,
@@ -192,6 +264,7 @@ impl App {
             }
             Action::Quit => {}
         }
+        AppEffect::None
     }
 
     pub fn transition(&mut self, transition: Transition) -> bool {
@@ -220,11 +293,13 @@ impl App {
         };
         if matches!(destination, Mode::Dialog | Mode::Help | Mode::Command) {
             self.suspended_mode = Some(current);
+        } else if destination == Mode::Browser && matches!(current, Mode::Viewer | Mode::Editor) {
+            self.selected_entry = None;
         } else if destination == Mode::Locked {
             self.suspended_mode = None;
             self.focus = PaneFocus::Sidebar;
             self.invalidate_requests();
-            self.startup = None;
+            self.selected_entry = None;
             self.status = "Locked".to_owned();
         } else if current == Mode::Locked {
             self.status = "Authentication required".to_owned();
@@ -243,13 +318,6 @@ impl App {
 mod tests {
     use super::*;
 
-    fn success(token: RequestToken, payload: AsyncPayload) -> AsyncResult {
-        AsyncResult {
-            token,
-            payload: Ok(payload),
-        }
-    }
-
     #[test]
     fn every_legal_transition_reaches_its_destination() {
         let cases = [
@@ -299,14 +367,20 @@ mod tests {
     fn stale_and_duplicate_async_results_are_rejected() {
         let mut app = App::new();
         let token = app.begin_request();
-        let result = success(token, AsyncPayload::Refreshed);
+        let result = AsyncResult {
+            token,
+            payload: Err("completed".to_owned()),
+        };
         assert_eq!(app.apply_result(result.clone()), ResultDisposition::Applied);
         assert_eq!(app.apply_result(result), ResultDisposition::Stale);
 
         let stale = app.begin_request();
         assert!(app.transition(Transition::Lock));
         assert_eq!(
-            app.apply_result(success(stale, AsyncPayload::Refreshed)),
+            app.apply_result(AsyncResult {
+                token: stale,
+                payload: Err("stale".to_owned()),
+            }),
             ResultDisposition::Stale
         );
         assert_eq!(app.status(), "Locked");
@@ -316,16 +390,14 @@ mod tests {
     fn storage_results_are_applied_without_domain_inference() {
         let mut app = App::new();
         let token = app.begin_request();
-        let summary = StartupSummary {
-            configuration: "/config.toml".to_owned(),
-            vault: "/vault".to_owned(),
-        };
         assert_eq!(
-            app.apply_result(success(token, AsyncPayload::Startup(summary.clone()))),
+            app.apply_result(AsyncResult {
+                token,
+                payload: Err("typed storage failure".to_owned()),
+            }),
             ResultDisposition::Applied
         );
-        assert_eq!(app.startup(), Some(&summary));
+        assert_eq!(app.status(), "typed storage failure");
-        assert_eq!(app.status(), "Vault: /vault");
     }
 
     #[test]

apps/tui/src/lib.rs

@@ -6,6 +6,7 @@
 pub mod action;
 pub mod app;
 pub mod runtime;
+pub mod sidebar;
 pub mod terminal;
 pub mod ui;
 
@@ -16,7 +17,7 @@ use ratatui::DefaultTerminal;
 
 use crate::{
     action::resolve_key,
-    app::{App, AsyncPayload, StartupSummary},
+    app::{App, AppEffect, AsyncPayload, StartupData},
     runtime::AsyncExecutor,
 };
 
@@ -27,23 +28,16 @@ const TICK_INTERVAL: Duration = Duration::from_millis(250);
 pub fn run(terminal: &mut DefaultTerminal) -> io::Result<()> {
     let mut app = App::new();
     let executor = AsyncExecutor::new();
-    let startup = app.begin_request();
+    let startup = app.begin_latest_request();
-    executor.submit(startup, || {
+    executor.submit(startup, || load_startup().map(AsyncPayload::Startup));
-        ironstorage::config::Config::load(None)
-            .map(|config| {
-                AsyncPayload::Startup(StartupSummary {
-                    configuration: config.source().display().to_string(),
-                    vault: config.vault().display().to_string(),
-                })
-            })
-            .map_err(|error| error.to_string())
-    });
 
     while !app.should_quit() {
         for result in executor.drain() {
             app.apply_result(result);
         }
 
+        let size = terminal.size()?;
+        app.resize(size.width, size.height);
         terminal.draw(|frame| ui::draw(frame, &app))?;
         if !event::poll(TICK_INTERVAL)? {
             app.tick();
@@ -52,8 +46,18 @@ pub fn run(terminal: &mut DefaultTerminal) -> io::Result<()> {
 
         match event::read()? {
             Event::Key(key) if key.kind == KeyEventKind::Press => {
-                if let Some(action) = resolve_key(app.mode(), key.code, key.modifiers) {
+                if app.sidebar().is_editing_filter() {
-                    app.dispatch(action);
+                    if handle_filter_key(&mut app, key.code) {
+                        submit_filter(&mut app, &executor);
+                    }
+                } else if let Some(action) = resolve_key(app.mode(), key.code, key.modifiers)
+                    && app.dispatch(action) == AppEffect::RefreshTree
+                    && let Some(config) = app.config().cloned()
+                {
+                    let token = app.begin_latest_request();
+                    executor.submit(token, move || {
+                        load_tree(&config).map(AsyncPayload::Refreshed)
+                    });
                 }
             }
             Event::Resize(width, height) => app.resize(width, height),
@@ -62,3 +66,58 @@ pub fn run(terminal: &mut DefaultTerminal) -> io::Result<()> {
     }
     Ok(())
 }
+
+fn load_startup() -> Result<StartupData, String> {
+    let config = ironstorage::config::Config::load(None).map_err(|error| error.to_string())?;
+    let tree = load_tree(&config)?;
+    Ok(StartupData { config, tree })
+}
+
+fn load_tree(config: &ironstorage::config::Config) -> Result<ironstorage::read::TreeModel, String> {
+    let repository = ironstorage::repository::Repository::open(config.vault())
+        .map_err(|error| error.to_string())?;
+    let keys = ironstorage::crypto::KeyStore::load(config.key_material())
+        .map_err(|error| error.to_string())?;
+    ironstorage::read::VaultReader::new(&repository, &keys)
+        .list(&ironstorage::repository::DirectoryPath::root())
+        .map_err(|error| error.to_string())
+}
+
+fn submit_filter(app: &mut App, executor: &AsyncExecutor) {
+    let query = app.sidebar().filter_query().to_owned();
+    if query.is_empty() {
+        app.sidebar_mut().reset_filter_results();
+        return;
+    }
+    let Some(config) = app.config().cloned() else {
+        return;
+    };
+    let token = app.begin_latest_request();
+    executor.submit(token, move || {
+        let repository = ironstorage::repository::Repository::open(config.vault())
+            .map_err(|error| error.to_string())?;
+        let keys = ironstorage::crypto::KeyStore::load(config.key_material())
+            .map_err(|error| error.to_string())?;
+        let results = ironstorage::read::VaultReader::new(&repository, &keys)
+            .find(std::slice::from_ref(&query))
+            .map_err(|error| error.to_string())?;
+        Ok(AsyncPayload::Filtered { query, results })
+    });
+}
+
+fn handle_filter_key(app: &mut App, code: crossterm::event::KeyCode) -> bool {
+    use crossterm::event::KeyCode;
+    match code {
+        KeyCode::Esc => {
+            app.sidebar_mut().clear_filter_results();
+            false
+        }
+        KeyCode::Enter => {
+            app.sidebar_mut().finish_filter();
+            false
+        }
+        KeyCode::Backspace => app.sidebar_mut().pop_filter_character(),
+        KeyCode::Char(character) => app.sidebar_mut().push_filter_character(character),
+        _ => false,
+    }
+}

apps/tui/src/runtime.rs

@@ -54,7 +54,7 @@ mod tests {
         let executor = AsyncExecutor::new();
         let mut app = App::new();
         let token = app.begin_request();
-        executor.submit(token, || Ok(AsyncPayload::Refreshed));
+        executor.submit(token, || Err("test result".to_owned()));
 
         let result = executor
             .receiver

apps/tui/src/sidebar.rs

@@ -0,0 +1,611 @@
+//! Presentation state for a storage-provided password-store tree.
+
+use std::collections::BTreeSet;
+
+use ironstorage::read::{FindResults, TreeModel, TreeNode, TreeNodeIndicators, TreeNodeKind};
+
+#[derive(Clone, Debug, Eq, Ord, PartialEq, PartialOrd)]
+pub struct NodeId {
+    path: String,
+    directory: bool,
+}
+
+impl NodeId {
+    pub fn path(&self) -> &str {
+        &self.path
+    }
+
+    pub fn is_directory(&self) -> bool {
+        self.directory
+    }
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+struct SidebarNode {
+    id: NodeId,
+    name: String,
+    indicators: TreeNodeIndicators,
+    children: Vec<SidebarNode>,
+}
+
+impl SidebarNode {
+    fn from_storage(node: &TreeNode) -> Self {
+        Self {
+            id: NodeId {
+                path: node.path().to_owned(),
+                directory: node.kind() == TreeNodeKind::Directory,
+            },
+            name: node.name().to_owned(),
+            indicators: node.indicators(),
+            children: node.children().iter().map(Self::from_storage).collect(),
+        }
+    }
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct VisibleRow {
+    pub id: NodeId,
+    pub name: String,
+    pub depth: usize,
+    pub indicators: TreeNodeIndicators,
+    pub expanded: bool,
+    pub has_children: bool,
+    parent: Option<NodeId>,
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub enum SidebarIntent {
+    None,
+    OpenEntry(String),
+}
+
+#[derive(Clone, Debug, Default, Eq, PartialEq)]
+pub struct Sidebar {
+    full: Vec<SidebarNode>,
+    filtered: Option<Vec<SidebarNode>>,
+    filtered_matches: BTreeSet<NodeId>,
+    expanded: BTreeSet<NodeId>,
+    selected: Option<NodeId>,
+    scroll: usize,
+    viewport_height: usize,
+    filter_query: String,
+    editing_filter: bool,
+}
+
+impl Sidebar {
+    pub fn replace_tree(&mut self, model: &TreeModel) {
+        let previous_index = self.selected_index().unwrap_or(0);
+        self.full = model
+            .children()
+            .iter()
+            .map(SidebarNode::from_storage)
+            .collect();
+        self.filtered = None;
+        self.filtered_matches.clear();
+        self.filter_query.clear();
+        self.editing_filter = false;
+        self.retain_valid_state(previous_index);
+    }
+
+    pub fn apply_filter_results(&mut self, query: &str, results: &FindResults) -> bool {
+        if query != self.filter_query {
+            return false;
+        }
+        let previous_index = self.selected_index().unwrap_or(0);
+        self.filtered = Some(
+            results
+                .tree()
+                .children()
+                .iter()
+                .map(SidebarNode::from_storage)
+                .collect(),
+        );
+        self.filtered_matches = results
+            .matches()
+            .iter()
+            .map(|matched| NodeId {
+                path: matched.path().to_owned(),
+                directory: matched.kind() == TreeNodeKind::Directory,
+            })
+            .collect();
+        self.retain_valid_state(previous_index);
+        true
+    }
+
+    pub fn clear_filter_results(&mut self) {
+        let previous_index = self.selected_index().unwrap_or(0);
+        self.filter_query.clear();
+        self.filtered = None;
+        self.filtered_matches.clear();
+        self.editing_filter = false;
+        self.retain_valid_state(previous_index);
+    }
+
+    pub fn reset_filter_results(&mut self) {
+        let previous_index = self.selected_index().unwrap_or(0);
+        self.filtered = None;
+        self.filtered_matches.clear();
+        self.retain_valid_state(previous_index);
+    }
+
+    pub fn begin_filter(&mut self) {
+        self.editing_filter = true;
+    }
+
+    pub fn finish_filter(&mut self) {
+        self.editing_filter = false;
+    }
+
+    pub fn is_editing_filter(&self) -> bool {
+        self.editing_filter
+    }
+
+    pub fn filter_query(&self) -> &str {
+        &self.filter_query
+    }
+
+    pub fn push_filter_character(&mut self, character: char) -> bool {
+        if character.is_control() {
+            return false;
+        }
+        self.filter_query.push(character);
+        true
+    }
+
+    pub fn pop_filter_character(&mut self) -> bool {
+        self.filter_query.pop().is_some()
+    }
+
+    pub fn selected(&self) -> Option<&NodeId> {
+        self.selected.as_ref()
+    }
+
+    pub fn set_viewport_height(&mut self, height: usize) {
+        self.viewport_height = height.max(1);
+        self.ensure_selected_visible();
+    }
+
+    pub fn visible_rows(&self) -> Vec<VisibleRow> {
+        let mut rows = Vec::new();
+        let filtering = !self.filter_query.is_empty();
+        flatten(
+            self.active_nodes(),
+            0,
+            None,
+            &self.expanded,
+            filtering,
+            &mut rows,
+        );
+        rows
+    }
+
+    pub fn visible_window(&self) -> Vec<VisibleRow> {
+        self.visible_rows()
+            .into_iter()
+            .skip(self.scroll)
+            .take(self.viewport_height.max(1))
+            .collect()
+    }
+
+    pub fn move_next(&mut self) {
+        self.move_by(1);
+    }
+
+    pub fn move_previous(&mut self) {
+        self.move_by(-1);
+    }
+
+    pub fn page_down(&mut self) {
+        self.move_by(self.viewport_height.max(1) as isize);
+    }
+
+    pub fn page_up(&mut self) {
+        self.move_by(-(self.viewport_height.max(1) as isize));
+    }
+
+    pub fn move_first(&mut self) {
+        self.select_index(0);
+    }
+
+    pub fn move_last(&mut self) {
+        let rows = self.visible_rows();
+        if !rows.is_empty() {
+            self.select_index(rows.len() - 1);
+        }
+    }
+
+    pub fn move_parent(&mut self) {
+        let rows = self.visible_rows();
+        let Some(index) = selected_index_in(&rows, self.selected.as_ref()) else {
+            return;
+        };
+        if let Some(parent) = &rows[index].parent {
+            self.selected = Some(parent.clone());
+            self.ensure_selected_visible();
+        }
+    }
+
+    pub fn move_child(&mut self) {
+        let rows = self.visible_rows();
+        let Some(index) = selected_index_in(&rows, self.selected.as_ref()) else {
+            return;
+        };
+        let row = &rows[index];
+        if !row.id.is_directory() || !row.has_children {
+            return;
+        }
+        self.expanded.insert(row.id.clone());
+        let rows = self.visible_rows();
+        if let Some(child) = rows.get(index + 1).filter(|child| child.depth > row.depth) {
+            self.selected = Some(child.id.clone());
+            self.ensure_selected_visible();
+        }
+    }
+
+    pub fn collapse_or_parent(&mut self) {
+        let Some(selected) = self.selected.clone() else {
+            return;
+        };
+        if selected.is_directory() && self.expanded.remove(&selected) {
+            self.ensure_selected_visible();
+        } else {
+            self.move_parent();
+        }
+    }
+
+    pub fn activate(&mut self) -> SidebarIntent {
+        let Some(selected) = self.selected.clone() else {
+            return SidebarIntent::None;
+        };
+        if selected.is_directory() {
+            if !self.expanded.remove(&selected) {
+                self.expanded.insert(selected);
+            }
+            self.ensure_selected_visible();
+            SidebarIntent::None
+        } else {
+            SidebarIntent::OpenEntry(selected.path)
+        }
+    }
+
+    pub fn next_match(&mut self) {
+        if self.filter_query.is_empty() {
+            return;
+        }
+        let matches = self.match_rows();
+        if matches.is_empty() {
+            return;
+        }
+        let next = matches
+            .iter()
+            .position(|row| Some(&row.id) == self.selected.as_ref())
+            .map_or(0, |index| (index + 1) % matches.len());
+        self.selected = Some(matches[next].id.clone());
+        self.ensure_selected_visible();
+    }
+
+    pub fn previous_match(&mut self) {
+        if self.filter_query.is_empty() {
+            return;
+        }
+        let matches = self.match_rows();
+        if matches.is_empty() {
+            return;
+        }
+        let previous = matches
+            .iter()
+            .position(|row| Some(&row.id) == self.selected.as_ref())
+            .map_or(0, |index| index.checked_sub(1).unwrap_or(matches.len() - 1));
+        self.selected = Some(matches[previous].id.clone());
+        self.ensure_selected_visible();
+    }
+
+    fn active_nodes(&self) -> &[SidebarNode] {
+        self.filtered.as_deref().unwrap_or(&self.full)
+    }
+
+    fn selected_index(&self) -> Option<usize> {
+        selected_index_in(&self.visible_rows(), self.selected.as_ref())
+    }
+
+    fn match_rows(&self) -> Vec<VisibleRow> {
+        self.visible_rows()
+            .into_iter()
+            .filter(|row| self.filtered_matches.contains(&row.id))
+            .collect()
+    }
+
+    fn move_by(&mut self, amount: isize) {
+        let rows = self.visible_rows();
+        if rows.is_empty() {
+            self.selected = None;
+            self.scroll = 0;
+            return;
+        }
+        let current = selected_index_in(&rows, self.selected.as_ref()).unwrap_or(0);
+        let destination = current.saturating_add_signed(amount).min(rows.len() - 1);
+        self.select_index(destination);
+    }
+
+    fn select_index(&mut self, index: usize) {
+        if let Some(row) = self.visible_rows().get(index) {
+            self.selected = Some(row.id.clone());
+            self.ensure_selected_visible();
+        }
+    }
+
+    fn ensure_selected_visible(&mut self) {
+        let rows = self.visible_rows();
+        let Some(index) = selected_index_in(&rows, self.selected.as_ref()) else {
+            self.scroll = self.scroll.min(rows.len().saturating_sub(1));
+            return;
+        };
+        if index < self.scroll {
+            self.scroll = index;
+        } else if index >= self.scroll + self.viewport_height.max(1) {
+            self.scroll = index + 1 - self.viewport_height.max(1);
+        }
+    }
+
+    fn retain_valid_state(&mut self, previous_index: usize) {
+        let all_ids = collect_ids(&self.full);
+        self.expanded.retain(|id| all_ids.contains(id));
+        let rows = self.visible_rows();
+        if !rows
+            .iter()
+            .any(|row| Some(&row.id) == self.selected.as_ref())
+        {
+            self.selected = rows
+                .get(previous_index.min(rows.len().saturating_sub(1)))
+                .map(|row| row.id.clone());
+        }
+        self.ensure_selected_visible();
+    }
+
+    #[cfg(test)]
+    pub(crate) fn replace_test_tree(&mut self, nodes: Vec<TestTreeNode>) {
+        self.full = nodes.into_iter().map(TestTreeNode::into_sidebar).collect();
+        self.filtered = None;
+        self.filtered_matches.clear();
+        self.retain_valid_state(0);
+    }
+}
+
+#[cfg(test)]
+pub(crate) struct TestTreeNode {
+    pub path: String,
+    pub name: String,
+    pub directory: bool,
+    pub indicators: TreeNodeIndicators,
+    pub children: Vec<TestTreeNode>,
+}
+
+#[cfg(test)]
+impl TestTreeNode {
+    fn into_sidebar(self) -> SidebarNode {
+        SidebarNode {
+            id: NodeId {
+                path: self.path,
+                directory: self.directory,
+            },
+            name: self.name,
+            indicators: self.indicators,
+            children: self.children.into_iter().map(Self::into_sidebar).collect(),
+        }
+    }
+}
+
+fn flatten(
+    nodes: &[SidebarNode],
+    depth: usize,
+    parent: Option<&NodeId>,
+    expanded: &BTreeSet<NodeId>,
+    force_expanded: bool,
+    rows: &mut Vec<VisibleRow>,
+) {
+    for node in nodes {
+        let is_expanded = force_expanded || expanded.contains(&node.id);
+        rows.push(VisibleRow {
+            id: node.id.clone(),
+            name: node.name.clone(),
+            depth,
+            indicators: node.indicators,
+            expanded: is_expanded,
+            has_children: !node.children.is_empty(),
+            parent: parent.cloned(),
+        });
+        if node.id.is_directory() && is_expanded {
+            flatten(
+                &node.children,
+                depth + 1,
+                Some(&node.id),
+                expanded,
+                force_expanded,
+                rows,
+            );
+        }
+    }
+}
+
+fn selected_index_in(rows: &[VisibleRow], selected: Option<&NodeId>) -> Option<usize> {
+    let selected = selected?;
+    rows.iter().position(|row| &row.id == selected)
+}
+
+fn collect_ids(nodes: &[SidebarNode]) -> BTreeSet<NodeId> {
+    fn visit(nodes: &[SidebarNode], ids: &mut BTreeSet<NodeId>) {
+        for node in nodes {
+            ids.insert(node.id.clone());
+            visit(&node.children, ids);
+        }
+    }
+    let mut ids = BTreeSet::new();
+    visit(nodes, &mut ids);
+    ids
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn node(path: &str, directory: bool, children: Vec<SidebarNode>) -> SidebarNode {
+        SidebarNode {
+            id: NodeId {
+                path: path.to_owned(),
+                directory,
+            },
+            name: path.rsplit('/').next().unwrap_or(path).to_owned(),
+            indicators: TreeNodeIndicators::default(),
+            children,
+        }
+    }
+
+    fn sidebar() -> Sidebar {
+        let mut sidebar = Sidebar {
+            full: vec![
+                node(
+                    "personal",
+                    true,
+                    vec![
+                        node("personal/email", false, vec![]),
+                        node("personal/咖啡", false, vec![]),
+                    ],
+                ),
+                node("work", true, vec![node("work/server", false, vec![])]),
+            ],
+            viewport_height: 3,
+            ..Sidebar::default()
+        };
+        sidebar.retain_valid_state(0);
+        sidebar
+    }
+
+    #[test]
+    fn navigation_is_deterministic_and_directories_are_collapsible() {
+        let mut sidebar = sidebar();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal"));
+        sidebar.move_child();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal/email"));
+        sidebar.move_next();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal/咖啡"));
+        sidebar.move_parent();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal"));
+        sidebar.collapse_or_parent();
+        assert_eq!(sidebar.visible_rows().len(), 2);
+        sidebar.move_last();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("work"));
+        sidebar.move_first();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal"));
+    }
+
+    #[test]
+    fn paging_clamps_and_scrolls_large_trees() {
+        let mut sidebar = Sidebar {
+            full: (0..1000)
+                .map(|index| node(&format!("entry-{index:04}"), false, vec![]))
+                .collect(),
+            viewport_height: 5,
+            ..Sidebar::default()
+        };
+        sidebar.retain_valid_state(0);
+        sidebar.page_down();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("entry-0005"));
+        assert_eq!(sidebar.scroll, 1);
+        sidebar.move_last();
+        sidebar.page_down();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("entry-0999"));
+        assert_eq!(sidebar.visible_window().len(), 5);
+        sidebar.page_up();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("entry-0994"));
+    }
+
+    #[test]
+    fn refresh_preserves_valid_state_and_repairs_deleted_selection() {
+        let mut sidebar = sidebar();
+        sidebar.move_child();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal/email"));
+        sidebar.full[0].children.remove(0);
+        sidebar.retain_valid_state(1);
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal/咖啡"));
+        assert!(
+            sidebar
+                .visible_rows()
+                .iter()
+                .any(|row| Some(&row.id) == sidebar.selected())
+        );
+    }
+
+    #[test]
+    fn filtering_uses_supplied_results_and_cycles_matches() {
+        let mut sidebar = sidebar();
+        sidebar.begin_filter();
+        assert!(sidebar.push_filter_character('咖'));
+        sidebar.filtered = Some(vec![node(
+            "personal",
+            true,
+            vec![node("personal/咖啡", false, vec![])],
+        )]);
+        sidebar.filtered_matches = [NodeId {
+            path: "personal/咖啡".to_owned(),
+            directory: false,
+        }]
+        .into_iter()
+        .collect();
+        sidebar.retain_valid_state(0);
+        assert_eq!(sidebar.visible_rows().len(), 2);
+        sidebar.next_match();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal/咖啡"));
+        sidebar.next_match();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal/咖啡"));
+        sidebar.previous_match();
+        assert_eq!(sidebar.selected().map(NodeId::path), Some("personal/咖啡"));
+        sidebar.clear_filter_results();
+        assert_eq!(sidebar.visible_rows().len(), 2);
+    }
+
+    #[test]
+    fn activation_never_opens_a_directory_as_an_entry() {
+        let mut sidebar = sidebar();
+        assert_eq!(sidebar.activate(), SidebarIntent::None);
+        sidebar.move_next();
+        assert_eq!(
+            sidebar.activate(),
+            SidebarIntent::OpenEntry("personal/email".to_owned())
+        );
+    }
+
+    #[test]
+    fn empty_tree_has_no_stale_selection() {
+        let mut sidebar = Sidebar::default();
+        sidebar.retain_valid_state(0);
+        sidebar.move_next();
+        sidebar.page_down();
+        assert_eq!(sidebar.selected(), None);
+        assert!(sidebar.visible_window().is_empty());
+    }
+
+    #[test]
+    fn deep_trees_and_entry_directory_name_collisions_keep_stable_identities() {
+        let mut nested = node("depth-128/entry", false, vec![]);
+        for depth in (0..128).rev() {
+            nested = node(&format!("depth-{depth}"), true, vec![nested]);
+        }
+        let collision_entry = node("shared", false, vec![]);
+        let collision_directory = node("shared", true, vec![node("shared/child", false, vec![])]);
+        let mut sidebar = Sidebar {
+            full: vec![nested, collision_directory, collision_entry],
+            viewport_height: 10,
+            filter_query: "force expansion".to_owned(),
+            ..Sidebar::default()
+        };
+        sidebar.retain_valid_state(0);
+        let rows = sidebar.visible_rows();
+        assert_eq!(rows.iter().map(|row| row.depth).max(), Some(128));
+        let collisions = rows
+            .iter()
+            .filter(|row| row.id.path() == "shared")
+            .collect::<Vec<_>>();
+        assert_eq!(collisions.len(), 2);
+        assert_ne!(collisions[0].id, collisions[1].id);
+    }
+}

apps/tui/src/ui.rs

@@ -76,14 +76,21 @@ fn render_content(frame: &mut Frame, app: &App, area: Rect) {
     }
 
     if app.mode() == Mode::Help {
-        let lines = crate::action::ACTIONS.iter().map(|spec| {
+        let available_rows = usize::from(area.height.saturating_sub(2)).max(1);
-            Line::from(vec![
+        let lines = (0..available_rows).map(|row| {
-                Span::styled(
+            let mut spans = Vec::new();
-                    format!("{:>7}", spec.binding.display),
+            for index in (row..crate::action::ACTIONS.len()).step_by(available_rows) {
+                let spec = &crate::action::ACTIONS[index];
+                spans.push(Span::styled(
+                    format!("{:>6}", spec.bindings[0].display),
                     Style::default().fg(Color::Cyan),
-                ),
+                ));
-                Span::raw(format!("  {:<18} :{}", spec.label, spec.command)),
+                spans.push(Span::raw(format!(
-            ])
+                    " {:<16} :{:<16}",
+                    spec.label, spec.command
+                )));
+            }
+            Line::from(spans)
         });
         frame.render_widget(
             Paragraph::new(lines.collect::<Vec<_>>())
@@ -112,9 +119,9 @@ fn render_content(frame: &mut Frame, app: &App, area: Rect) {
     };
     let panes = Layout::new(direction, constraints).split(area);
     frame.render_widget(
-        Paragraph::new(sidebar_text(app))
+        Paragraph::new(sidebar_lines(app))
             .block(pane_block("Passwords", app.focus() == PaneFocus::Sidebar))
-            .wrap(Wrap { trim: true }),
+            .wrap(Wrap { trim: false }),
         panes[0],
     );
     frame.render_widget(
@@ -142,24 +149,62 @@ fn pane_block(title: &'static str, focused: bool) -> Block<'static> {
         .border_style(style)
 }
 
-fn sidebar_text(app: &App) -> String {
+fn sidebar_lines(app: &App) -> Vec<Line<'static>> {
+    let selected = app.sidebar().selected();
+    let rows = app.sidebar().visible_window();
+    if rows.is_empty() {
         if app.is_busy() {
-        "Loading password-store tree…".to_owned()
+            return vec![Line::from("Loading password-store tree…")];
-    } else if let Some(startup) = app.startup() {
-        format!("Vault\n{}", startup.vault)
-    } else {
-        "No password store is open.".to_owned()
         }
+        return vec![Line::from("No password entries.")];
+    }
+    rows.into_iter()
+        .map(|row| {
+            let marker = if row.id.is_directory() {
+                if row.expanded { "▼" } else { "▶" }
+            } else {
+                "•"
+            };
+            let mut indicators = String::new();
+            if row.indicators.is_locked() {
+                indicators.push_str(" L");
+            }
+            if row.indicators.is_changed() {
+                indicators.push_str(" *");
+            }
+            if row.indicators.has_conflict() {
+                indicators.push_str(" !");
+            }
+            let style = if selected == Some(&row.id) {
+                Style::default().bg(Color::Blue).fg(Color::White)
+            } else {
+                Style::default()
+            };
+            Line::styled(
+                format!(
+                    "{}{} {}{}",
+                    "  ".repeat(row.depth),
+                    marker,
+                    row.name,
+                    indicators
+                ),
+                style,
+            )
+        })
+        .collect()
 }
 
-fn main_text(app: &App) -> &'static str {
+fn main_text(app: &App) -> String {
     match app.mode() {
-        Mode::Browser => "Select an entry from the sidebar.",
+        Mode::Browser => "Select an entry from the sidebar.".to_owned(),
-        Mode::Viewer => "Structured entry viewer",
+        Mode::Viewer => app.selected_entry().map_or_else(
-        Mode::Editor => "Structured entry editor",
+            || "Structured entry viewer".to_owned(),
-        Mode::Dialog => "Complete or cancel the active dialog.",
+            |path| format!("Opening {path}…"),
-        Mode::Command => "Enter a command on the bottom line.",
+        ),
-        Mode::Help | Mode::Locked => "",
+        Mode::Editor => "Structured entry editor".to_owned(),
+        Mode::Dialog => "Complete or cancel the active dialog.".to_owned(),
+        Mode::Command => "Enter a command on the bottom line.".to_owned(),
+        Mode::Help | Mode::Locked => String::new(),
     }
 }
 
@@ -188,7 +233,7 @@ fn status_line(app: &App) -> Paragraph<'_> {
 
 fn context_line(app: &App) -> Paragraph<'static> {
     let text = available_actions(app.mode())
-        .map(|spec| format!("{} {}", spec.binding.display, spec.label))
+        .map(|spec| format!("{} {}", spec.bindings[0].display, spec.label))
         .collect::<Vec<_>>()
         .join("  ");
     Paragraph::new(text)
@@ -198,6 +243,10 @@ fn prompt_line(app: &App) -> Paragraph<'static> {
     match app.mode() {
         Mode::Command => Paragraph::new(":").style(Style::default().fg(Color::Yellow)),
         Mode::Dialog => Paragraph::new("dialog> ").style(Style::default().fg(Color::Yellow)),
+        _ if app.sidebar().is_editing_filter() => {
+            Paragraph::new(format!("/{}", app.sidebar().filter_query()))
+                .style(Style::default().fg(Color::Yellow))
+        }
         _ => Paragraph::new(""),
     }
 }
@@ -208,6 +257,7 @@ mod tests {
 
     use super::*;
     use crate::app::Transition;
+    use crate::sidebar::TestTreeNode;
 
     fn render(width: u16, height: u16, app: &App) -> String {
         let backend = TestBackend::new(width, height);
@@ -268,4 +318,56 @@ mod tests {
             assert!(output.contains(spec.command));
         }
     }
+
+    #[test]
+    fn hierarchy_selection_and_storage_indicators_have_stable_rendering() {
+        let mut app = App::new();
+        app.resize(100, 20);
+        app.sidebar_mut().replace_test_tree(vec![TestTreeNode {
+            path: "personal".to_owned(),
+            name: "personal".to_owned(),
+            directory: true,
+            indicators: ironstorage::read::TreeNodeIndicators::default(),
+            children: vec![TestTreeNode {
+                path: "personal/咖啡".to_owned(),
+                name: "咖啡".to_owned(),
+                directory: false,
+                indicators: ironstorage::read::TreeNodeIndicators::new(true, true, true),
+                children: vec![],
+            }],
+        }]);
+        app.sidebar_mut().move_child();
+        let output = render(100, 20, &app);
+        assert!(output.contains("▼ personal"));
+        assert!(output.contains('咖'));
+        assert!(output.contains("L * !"));
+    }
+
+    #[test]
+    fn scrolling_focus_filter_prompt_and_resize_are_rendered() {
+        let mut app = App::new();
+        app.resize(60, 10);
+        app.sidebar_mut().replace_test_tree(
+            (0..20)
+                .map(|index| TestTreeNode {
+                    path: format!("entry-{index:02}"),
+                    name: format!("entry-{index:02}"),
+                    directory: false,
+                    indicators: ironstorage::read::TreeNodeIndicators::default(),
+                    children: vec![],
+                })
+                .collect(),
+        );
+        app.sidebar_mut().move_last();
+        app.sidebar_mut().begin_filter();
+        app.sidebar_mut().push_filter_character('咖');
+        let narrow = render(60, 10, &app);
+        assert!(narrow.contains("entry-19"));
+        assert!(narrow.contains("/咖"));
+        assert!(!narrow.contains("entry-00"));
+
+        app.dispatch(crate::action::Action::FocusNext);
+        let wide = render(140, 20, &app);
+        assert!(wide.contains("Browser"));
+    }
 }

crates/storage/src/read.rs

@@ -21,11 +21,43 @@ pub enum TreeNodeKind {
     Entry,
 }
 
+/// Presentation-safe state calculated by storage services for a tree object.
+/// Frontends render these flags and never infer them from names or paths.
+#[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
+pub struct TreeNodeIndicators {
+    locked: bool,
+    changed: bool,
+    conflict: bool,
+}
+
+impl TreeNodeIndicators {
+    pub const fn new(locked: bool, changed: bool, conflict: bool) -> Self {
+        Self {
+            locked,
+            changed,
+            conflict,
+        }
+    }
+
+    pub const fn is_locked(self) -> bool {
+        self.locked
+    }
+
+    pub const fn is_changed(self) -> bool {
+        self.changed
+    }
+
+    pub const fn has_conflict(self) -> bool {
+        self.conflict
+    }
+}
+
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct TreeNode {
     name: String,
     path: String,
     kind: TreeNodeKind,
+    indicators: TreeNodeIndicators,
     children: Vec<TreeNode>,
 }
 
@@ -42,6 +74,10 @@ impl TreeNode {
         self.kind
     }
 
+    pub fn indicators(&self) -> TreeNodeIndicators {
+        self.indicators
+    }
+
     pub fn children(&self) -> &[TreeNode] {
         &self.children
     }
@@ -592,6 +628,7 @@ fn finalize_children(node: MutableNode, parent: &Path) -> Result<Vec<TreeNode>,
                 name,
                 path: path_text(&path)?,
                 kind,
+                indicators: TreeNodeIndicators::default(),
                 children,
             })
         })