update

crates/dock/src/lib.rs

@@ -26,6 +26,19 @@ pub fn add_center_panel(
     area.add_panel_view(panel, DockPlacement::Center, None, window, cx);
 }
 
+/// Add an already-wrapped panel handle to the bottom dock of `area`.
+///
+/// Used for sub-views that hang under the center, such as the inbox's Unread
+/// and Archived lists.
+pub fn add_bottom_panel(
+    area: &mut DockArea,
+    panel: Arc<dyn PanelView>,
+    window: &mut Window,
+    cx: &mut Context<DockArea>,
+) {
+    area.add_panel_view(panel, DockPlacement::Bottom, None, window, cx);
+}
+
 /// The fixed height of the tab bar, which doubles as the window title bar.
 pub const TAB_BAR_HEIGHT: Pixels = px(44.);
 

crates/workspace/src/views/inbox.rs

@@ -3,12 +3,14 @@ use std::time::Duration;
 
 use anyhow::Error;
 use assets::CustomIconName;
-use dock::{BasePanel, Panel, PanelEvent};
+use dock::{BasePanel, DockArea, DockPlacement, Panel, PanelEvent, add_bottom_panel, panel_handle};
 use gpui::prelude::*;
 use gpui::{
-    AnyElement, App, Context, EventEmitter, FocusHandle, Focusable, ListAlignment, ListState,
-    Pixels, Render, SharedString, Subscription, Task, Window, div, list, px,
+    AnyElement, App, Context, Div, Entity, EventEmitter, FocusHandle, Focusable, ListAlignment,
+    ListState, Pixels, Render, SharedString, Stateful, Subscription, Task, WeakEntity, Window, div,
+    list, px,
 };
+use gpui_component::button::{Button, ButtonVariants};
 use gpui_component::scroll::ScrollableElement;
 use gpui_component::{ActiveTheme, Icon, IconName, IconNamed, Sizable, StyledExt, h_flex, v_flex};
 use nostr::prelude::{Event, EventId, Kind};
@@ -21,6 +23,8 @@ use signed_state::{
 use signed_ui::{CountBadge, SegmentButton, UserAvatar};
 use utils::relative_time;
 
+use super::{RepoItem, open_repo_item, open_repo_panel};
+
 /// Delay between a refresh request and the actual re-query.
 const REFRESH_DEBOUNCE: Duration = Duration::from_millis(300);
 
@@ -29,6 +33,11 @@ const LIST_OVERDRAW: Pixels = px(400.);
 
 pub struct InboxView {
     focus_handle: FocusHandle,
+    /// The dock area the Unread / Archived sub-view is added to.
+    dock_area: WeakEntity<DockArea>,
+    /// The open Unread / Archived sub-view, if any. Reused instead of adding a
+    /// duplicate panel on every header click.
+    filter_view: Option<WeakEntity<InboxFilterView>>,
     /// Notifications grouped by thread root, newest activity first.
     notifications: Arc<Vec<InboxItem>>,
     /// The user's own recent git activity, newest first.
@@ -49,7 +58,7 @@ pub struct InboxView {
 }
 
 impl InboxView {
-    pub fn new(cx: &mut Context<Self>) -> Self {
+    pub fn new(dock_area: WeakEntity<DockArea>, cx: &mut Context<Self>) -> Self {
         let backend = Backend::global(cx);
         let inbox = backend.read(cx).inbox();
         let weak = cx.entity().downgrade();
@@ -87,6 +96,8 @@ impl InboxView {
 
         Self {
             focus_handle: cx.focus_handle(),
+            dock_area,
+            filter_view: None,
             notifications: Arc::new(Vec::new()),
             activity: Arc::new(Vec::new()),
             unread_count: 0,
@@ -100,7 +111,6 @@ impl InboxView {
     }
 
     /// Mark every event in the group rooted at `root` read.
-    #[allow(dead_code)] // Wired up by the Phase 3 Unread/Archived panels.
     pub fn mark_read(&mut self, root: EventId, cx: &mut Context<Self>) {
         let Some(me) = Backend::global(cx).read(cx).current_user() else {
             return;
@@ -116,7 +126,6 @@ impl InboxView {
     }
 
     /// Archive the group rooted at `root`.
-    #[allow(dead_code)] // Wired up by the Phase 3 Unread/Archived panels.
     pub fn mark_archived(&mut self, root: EventId, cx: &mut Context<Self>) {
         let Some(me) = Backend::global(cx).read(cx).current_user() else {
             return;
@@ -142,6 +151,35 @@ impl InboxView {
         inbox.update(cx, |inbox, cx| inbox.mark_all_read(&all, me, cx));
     }
 
+    /// Show `mode` in the bottom dock, reusing the panel when it is already open.
+    fn open_filter(&mut self, mode: InboxFilter, window: &mut Window, cx: &mut Context<Self>) {
+        let Some(dock_area) = self.dock_area.upgrade() else {
+            return;
+        };
+
+        if let Some(filter) = self.filter_view.as_ref().and_then(WeakEntity::upgrade) {
+            filter.update(cx, |filter, cx| filter.set_mode(mode, cx));
+
+            let handle = filter.read(cx).focus_handle.clone();
+            window.focus(&handle, cx);
+
+            dock_area.update(cx, |dock_area, cx| {
+                if !dock_area.is_dock_open(DockPlacement::Bottom) {
+                    dock_area.toggle_dock(DockPlacement::Bottom, window, cx);
+                }
+            });
+            return;
+        }
+
+        let inbox = cx.entity();
+        let panel = cx.new(|cx| InboxFilterView::new(mode, inbox, cx));
+        self.filter_view = Some(panel.downgrade());
+
+        dock_area.update(cx, |dock_area, cx| {
+            add_bottom_panel(dock_area, panel_handle(panel), window, cx);
+        });
+    }
+
     /// Re-derive from the global state when it is loaded or changes.
     pub fn sync_state(&mut self, cx: &mut Context<Self>) {
         let inbox = Backend::global(cx).read(cx).inbox();
@@ -307,7 +345,6 @@ impl InboxView {
     }
 
     /// Events of the group rooted at `root`.
-    #[allow(dead_code)] // Only used by the Phase 3 mark actions.
     fn group_events(&self, root: EventId) -> Option<Vec<Event>> {
         self.notifications
             .iter()
@@ -368,6 +405,20 @@ impl InboxView {
             )
             .when(unread > 0, |this| this.child(CountBadge::new(unread)))
             .child(div().flex_1())
+            .child(
+                SegmentButton::new("inbox-unread", "Unread")
+                    .icon(Icon::new(IconName::Inbox).small())
+                    .on_click(cx.listener(|this, _event, window, cx| {
+                        this.open_filter(InboxFilter::Unread, window, cx);
+                    })),
+            )
+            .child(
+                SegmentButton::new("inbox-archived", "Archived")
+                    .icon(Icon::new(IconName::FolderClosed).small())
+                    .on_click(cx.listener(|this, _event, window, cx| {
+                        this.open_filter(InboxFilter::Archived, window, cx);
+                    })),
+            )
             .child(
                 SegmentButton::new("mark-all-read", "Mark all read")
                     .on_click(cx.listener(|this, _event, _window, cx| this.mark_all_read(cx))),
@@ -377,11 +428,22 @@ impl InboxView {
             empty_state(IconName::Inbox, "You're all caught up.", cx)
         } else {
             let list_state = self.notifications_list.clone();
+            let dock_area = self.dock_area.clone();
             let rows = list(list_state.clone(), move |ix, _window, cx| {
                 let Some(item) = visible.get(ix).and_then(|&ix| notifications.get(ix)) else {
                     return div().into_any_element();
                 };
-                notification_row(ix, item, cx)
+
+                let root = item.root;
+                let kind = item.root_kind;
+                let address = item.address.clone();
+                let dock_area = dock_area.clone();
+
+                notification_row("inbox-row", ix, item, cx)
+                    .on_click(move |_, window, cx| {
+                        open_item(&dock_area, root, kind, address.clone(), window, cx);
+                    })
+                    .into_any_element()
             })
             .size_full()
             .min_h_0();
@@ -451,10 +513,56 @@ fn repo_name(addr: Option<&RepoAddr>, cx: &App) -> Option<SharedString> {
         .map(display_name)
 }
 
+/// Open the repository of a notification group, and the issue or pull request
+/// detail when the group's root is one.
+///
+/// The group carries only the repository coordinate, so the announcement is
+/// looked up in the local list. A group whose repository is not known locally
+/// opens nothing.
+fn open_item(
+    dock_area: &WeakEntity<DockArea>,
+    root: EventId,
+    kind: Option<Kind>,
+    address: Option<RepoAddr>,
+    window: &mut Window,
+    cx: &mut App,
+) {
+    let Some(address) = address else {
+        return;
+    };
+
+    let Some(announcement) = RepoListStore::global(cx)
+        .read(cx)
+        .announcements
+        .iter()
+        .find(|announcement| announcement.addr() == address)
+        .cloned()
+    else {
+        return;
+    };
+
+    let detail = open_repo_panel(dock_area, &announcement, window, cx);
+    let Some(store) = detail.read(cx).store() else {
+        return;
+    };
+
+    let item = match kind {
+        Some(Kind::GitIssue) => RepoItem::Issue(root),
+        Some(Kind::GitPullRequest) => RepoItem::PullRequest(root),
+        Some(Kind::GitPatch) => RepoItem::Patch,
+        _ => return,
+    };
+
+    open_repo_item(dock_area, store, item, window, cx);
+}
+
 /// Leading row of a notification group, newest event first.
-fn notification_row(ix: usize, item: &InboxItem, cx: &App) -> AnyElement {
+///
+/// `prefix` scopes the row's element id, so the inbox list and the Unread /
+/// Archived list do not collide when both are on screen.
+fn notification_row(prefix: &'static str, ix: usize, item: &InboxItem, cx: &App) -> Stateful<Div> {
     let Some(newest) = item.events.first() else {
-        return div().into_any_element();
+        return div().id((prefix, ix));
     };
 
     let profiles = ProfileStore::global(cx);
@@ -466,7 +574,7 @@ fn notification_row(ix: usize, item: &InboxItem, cx: &App) -> AnyElement {
     let unread = item.is_unread();
 
     h_flex()
-        .id(("inbox-row", ix))
+        .id((prefix, ix))
         .w_full()
         .gap_3()
         .px_3()
@@ -511,7 +619,6 @@ fn notification_row(ix: usize, item: &InboxItem, cx: &App) -> AnyElement {
                     .bg(cx.theme().primary),
             )
         })
-        .into_any_element()
 }
 
 /// One row of the user's own recent git activity.
@@ -634,6 +741,166 @@ fn empty_state(icon: impl IconNamed, message: &str, cx: &App) -> AnyElement {
         .into_any_element()
 }
 
+/// Which subset of the inbox a bottom-dock sub-view shows.
+#[derive(Clone, Copy, PartialEq, Eq)]
+enum InboxFilter {
+    Unread,
+    Archived,
+}
+
+impl InboxFilter {
+    /// Tab and empty-state label of the sub-view.
+    fn label(self) -> &'static str {
+        match self {
+            Self::Unread => "Unread",
+            Self::Archived => "Archived",
+        }
+    }
+
+    /// Whether `item` belongs in this sub-view.
+    fn matches(self, item: &InboxItem) -> bool {
+        match self {
+            Self::Unread => item.is_unread(),
+            Self::Archived => item.archived,
+        }
+    }
+}
+
+/// The Unread / Archived sub-view of the inbox, opened in the bottom dock.
+struct InboxFilterView {
+    focus_handle: FocusHandle,
+    /// The inbox panel whose groups are filtered. A strong handle: the panel
+    /// keeps only a weak one back, so the two entities do not form a cycle.
+    inbox: Entity<InboxView>,
+    mode: InboxFilter,
+    list: ListState,
+}
+
+impl InboxFilterView {
+    fn new(mode: InboxFilter, inbox: Entity<InboxView>, cx: &mut Context<Self>) -> Self {
+        let list = ListState::new(0, ListAlignment::Top, LIST_OVERDRAW);
+        let weak = cx.entity().downgrade();
+        list.set_scroll_handler(move |_, _, cx| {
+            let weak = weak.clone();
+            cx.defer(move |cx| {
+                let _ = weak.update(cx, |_, cx| cx.notify());
+            });
+        });
+
+        Self {
+            focus_handle: cx.focus_handle(),
+            inbox,
+            mode,
+            list,
+        }
+    }
+
+    /// Switch which subset is shown, when the header asks for another mode.
+    fn set_mode(&mut self, mode: InboxFilter, cx: &mut Context<Self>) {
+        if self.mode == mode {
+            return;
+        }
+        self.mode = mode;
+        cx.notify();
+    }
+}
+
+impl BasePanel for InboxFilterView {
+    fn panel_name(&self) -> &'static str {
+        "inbox_filter"
+    }
+}
+
+impl Panel for InboxFilterView {
+    fn title(&mut self, _window: &mut Window, _cx: &mut Context<Self>) -> impl IntoElement {
+        div().text_sm().child(SharedString::from(self.mode.label()))
+    }
+}
+
+impl EventEmitter<PanelEvent> for InboxFilterView {}
+
+impl Focusable for InboxFilterView {
+    fn focus_handle(&self, _cx: &App) -> FocusHandle {
+        self.focus_handle.clone()
+    }
+}
+
+impl Render for InboxFilterView {
+    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        let mode = self.mode;
+        let notifications = self.inbox.read(cx).notifications.clone();
+
+        let visible: Vec<usize> = notifications
+            .iter()
+            .enumerate()
+            .filter(|(_, item)| mode.matches(item))
+            .map(|(ix, _)| ix)
+            .collect();
+
+        if self.list.item_count() != visible.len() {
+            self.list.reset(visible.len());
+        }
+
+        let list_state = self.list.clone();
+        let inbox = self.inbox.clone();
+
+        let body: AnyElement = if visible.is_empty() {
+            let (icon, message) = match mode {
+                InboxFilter::Unread => (IconName::Inbox, "Nothing unread."),
+                InboxFilter::Archived => (IconName::FolderClosed, "Nothing archived."),
+            };
+            empty_state(icon, message, cx)
+        } else {
+            let rows = list(list_state.clone(), move |ix, _window, cx| {
+                let Some(item) = visible.get(ix).and_then(|&ix| notifications.get(ix)) else {
+                    return div().into_any_element();
+                };
+
+                match mode {
+                    InboxFilter::Unread => {
+                        let root = item.root;
+                        let open = inbox.clone();
+                        let archive = inbox.clone();
+
+                        notification_row("inbox-filter-row", ix, item, cx)
+                            .on_click(move |_, _, cx| {
+                                open.update(cx, |view, cx| view.mark_read(root, cx));
+                            })
+                            .child(
+                                Button::new(("inbox-filter-archive", ix))
+                                    .icon(IconName::FolderClosed)
+                                    .small()
+                                    .ghost()
+                                    .tab_stop(false)
+                                    .tooltip("Archive")
+                                    .on_click(move |_, _, cx| {
+                                        cx.stop_propagation();
+                                        archive.update(cx, |view, cx| view.mark_archived(root, cx));
+                                    }),
+                            )
+                            .into_any_element()
+                    }
+                    InboxFilter::Archived => {
+                        notification_row("inbox-filter-row", ix, item, cx).into_any_element()
+                    }
+                }
+            })
+            .size_full()
+            .min_h_0();
+
+            div()
+                .relative()
+                .flex_1()
+                .min_h_0()
+                .child(rows)
+                .vertical_scrollbar(&list_state)
+                .into_any_element()
+        };
+
+        v_flex().size_full().min_h_0().p_2().child(body)
+    }
+}
+
 impl BasePanel for InboxView {
     fn panel_name(&self) -> &'static str {
         "inbox"

crates/workspace/src/views/mod.rs

@@ -6,6 +6,6 @@ pub(crate) mod sidebar;
 
 pub use inbox::InboxView;
 pub use repo_detail::RepoDetailView;
-pub(crate) use repo_detail::open_repo_panel;
+pub(crate) use repo_detail::{RepoItem, open_repo_item, open_repo_panel};
 pub use repo_list::RepoListView;
 pub use sidebar::SidebarPanel;

crates/workspace/src/views/repo_detail/mod.rs

@@ -1,6 +1,7 @@
 use std::collections::{HashMap, HashSet, VecDeque};
 use std::path::{Component, Path, PathBuf};
 use std::rc::Rc;
+use std::sync::Arc;
 use std::time::Duration;
 
 use anyhow::Error;
@@ -13,6 +14,7 @@ use gpui::{
     Focusable, PathPromptOptions, Pixels, Render, SharedString, Size, Subscription, WeakEntity,
     Window, div, px, relative, size, transparent_white,
 };
+use gpui_base::dock::PanelView;
 use gpui_base::{Button as BaseButton, Disableable, Popover};
 use gpui_component::alert::Alert;
 use gpui_component::button::{Button, ButtonVariants};
@@ -24,7 +26,7 @@ use gpui_component::{
     ActiveTheme, Colorize, Icon, IconName, Sizable, StyledExt, ThemeStyled,
     VirtualListScrollHandle, h_flex, v_flex,
 };
-use nostr::prelude::{RelayUrl, ToBech32, Url};
+use nostr::prelude::{EventId, RelayUrl, ToBech32, Url};
 use signed_core::{Announcement, RepoAddr, RepoStatus, filters};
 use signed_git::{CommitList, FileCommit};
 use signed_state::{
@@ -57,7 +59,9 @@ use helpers::{
     ShareTargets, TreeItemSeed, build_tree_items, is_markdown_path, ref_selector_trigger,
     tree_items,
 };
+use issue_detail::IssueDetailView;
 use issues::{IssuesView, open_new_issue_dialog};
+use pull_request_detail::PullRequestDetailView;
 use pull_requests::PullRequestsView;
 use send_patch::open_send_patch_panel;
 
@@ -227,6 +231,12 @@ impl RepoDetailView {
         view
     }
 
+    /// The per-repository nostr store, so another panel can open one of its
+    /// items. `None` until a local repository is initialized to NIP-34.
+    pub(crate) fn store(&self) -> Option<Entity<RepoStore>> {
+        self.store.clone()
+    }
+
     /// Open a local repository discovered by the scan.
     pub fn new_local(
         dock_area: WeakEntity<DockArea>,
@@ -2649,3 +2659,41 @@ pub(crate) fn open_repo_panel(
 
     detail
 }
+
+/// An item of a repository to open from outside its detail panel.
+/// A patch has no detail view in Signed, so it opens nothing.
+pub(crate) enum RepoItem {
+    Issue(EventId),
+    PullRequest(EventId),
+    Patch,
+}
+
+/// Open the detail panel of `item` in `store`'s repository, in the dock's center.
+///
+/// A patch opens nothing: patches are only consumed inside a pull request's
+/// detail panel, and have no panel of their own.
+pub(crate) fn open_repo_item(
+    dock_area: &WeakEntity<DockArea>,
+    store: Entity<RepoStore>,
+    item: RepoItem,
+    window: &mut Window,
+    cx: &mut App,
+) {
+    let panel: Arc<dyn PanelView> = match item {
+        RepoItem::Issue(issue_id) => {
+            panel_handle(cx.new(|cx| IssueDetailView::new(store, issue_id, window, cx)))
+        }
+        RepoItem::PullRequest(pr_id) => panel_handle(
+            cx.new(|cx| PullRequestDetailView::new(dock_area.clone(), store, pr_id, window, cx)),
+        ),
+        RepoItem::Patch => return,
+    };
+
+    let Some(dock_area) = dock_area.upgrade() else {
+        return;
+    };
+
+    dock_area.update(cx, |dock_area, cx| {
+        add_center_panel(dock_area, panel, window, cx);
+    });
+}

crates/workspace/src/views/sidebar/mod.rs

@@ -224,7 +224,7 @@ impl SidebarPanel {
             return;
         }
 
-        let panel = cx.new(InboxView::new);
+        let panel = cx.new(|cx| InboxView::new(self.dock_area.clone(), cx));
         self.inbox = Some(panel.downgrade());
 
         let _ = self.dock_area.update(cx, |dock_area, cx| {

docs/inbox-plan.md

@@ -6,13 +6,13 @@ Ported from GitWorkshop's home screen, the `Dashboard` rendered at route `/` for
 > page. It is not. GitWorkshop's `Index` route (`src/pages/Index.tsx`) renders `<Dashboard />` when
 > an account is active, and that home screen is the inbox.
 
-> **Status.** Phases 0, 1 and 2 are implemented and green on `feat/inbox`:
+> **Status.** Phases 0-4 are implemented and green on `feat/inbox`:
 > `cargo test -p signed_core` (68), `cargo test -p signed_state` (24),
 > `cargo test -p workspace` (7), `cargo clippy -p workspace --all-targets` clean,
 > `cargo check --workspace --all-targets` succeeds.
-> Phases 3-5 are not started. This document reflects the implementation as it stands, including the
-> Phase 1 refactors and the §4.3 split of the inbox into a thin global `Inbox` and a
-> panel-owned derivation.
+> Phase 5 is not started. This document reflects the implementation as it stands, including the
+> Phase 1 refactors, the §4.3 split of the inbox into a thin global `Inbox` and a panel-owned
+> derivation, the Phase 3 bottom-dock sub-views, and the Phase 4 click-through.
 
 ## 1. What the GitWorkshop home screen is
 
@@ -479,16 +479,17 @@ definite viewport height. The list counts are reset from `render` whenever the r
 changes. Row ids are prefixed (`("inbox-row", ix)` / `("activity-row", ix)`) so the two lists do not
 collide.
 
-- **Inbox card**: header with the unread count badge and **Mark all read**; then every non-archived
-  notification item. Rows show the actor avatar, a kind icon, the subject, the kind label, the repo
-  name, a relative time, and an unread dot (the subject is semibold while unread). Empty state:
-  "You're all caught up." with `IconName::Inbox`.
+- **Inbox card**: header with the unread count badge, the **Unread** and **Archived** sub-view buttons
+  (Phase 3) and **Mark all read**; then every non-archived notification item. Rows show the actor
+  avatar, a kind icon, the subject, the kind label, the repo name, a relative time, and an unread dot
+  (the subject is semibold while unread). Empty state: "You're all caught up." with
+  `IconName::Inbox`.
 - **Continue where you left off**: every event in the activity list, each row a kind icon, subject,
   kind label, repo name, and relative time.
 
 No greeting header, and no **My repositories** column - the sidebar already lists the user's
-repositories. The **Unread** and **Archived** header buttons belong to Phase 3 and are not
-rendered until `add_bottom_panel` / `InboxFilterView` exist (see 5.2).
+repositories. The **Unread** and **Archived** header buttons open the sub-views of 5.2 in the bottom
+dock.
 
 ### 5.2 Unread / Archived as bottom-dock panels
 
@@ -508,12 +509,20 @@ pub fn add_bottom_panel(
 
 The workspace already supports a bottom dock and prunes it when empty (`workspace.rs`). Then:
 
-- New `InboxFilterView` panel taking a mode `InboxFilter::Unread | InboxFilter::Archived` and the
-  `Entity<InboxView>`. It renders the matching subset of the panel's notifications as a list.
-- The **Unread** and **Archived** header buttons in `InboxView` (added in Phase 3) call
-  `add_bottom_panel` with the requested mode. `InboxView` keeps
-  `filter_view: Option<WeakEntity<InboxFilterView>>`; when it already exists, update its mode and
-  focus instead of adding a duplicate. Until then the inbox header has only **Mark all read**.
+- `InboxFilterView` is a bottom-dock panel holding an `Entity<InboxView>` and a mode
+  `InboxFilter::Unread | InboxFilter::Archived`. It renders the matching subset of the panel's
+  notifications as a `gpui::list`, with the same rows as the inbox card. The mode filters on
+  `InboxItem::is_unread()` / `InboxItem::archived` and picks the tab title and empty state. It reads
+  the inbox entity during render, so GPUI's render-time tracking re-renders it whenever the inbox
+  re-derives; it needs no subscription of its own.
+- The **Unread** and **Archived** header buttons in `InboxView` call `InboxView::open_filter`, which
+  keeps `filter_view: Option<WeakEntity<InboxFilterView>>`. When the panel already exists it updates
+  its mode, focuses it, and reopens the bottom dock if the user collapsed it, instead of adding a
+  duplicate. Otherwise it creates the panel and adds it to the bottom dock.
+- **Unread rows**: clicking a row marks that group read (`InboxView::mark_read`); a trailing ghost
+  icon button archives it (`InboxView::mark_archived`). Both call back into the `InboxView` entity,
+  which updates the global `Inbox`. **Archived rows** are display-only, since the read state has no
+  un-archive operation.
 
 ### 5.3 Sidebar
 
@@ -522,6 +531,7 @@ In `views/sidebar/mod.rs`:
 - Add `inbox: Option<WeakEntity<InboxView>>` (mirrors `explore`) and `unread: usize`.
 - Add `fn open_inbox(&mut self, window, cx)` that returns when the panel is already open, else adds
   a center panel (same shape as `open_explore`; there is no dock API to focus an existing tab).
+  `InboxView::new` takes the sidebar's `WeakEntity<DockArea>` so the panel can open its sub-view.
 - Point the existing nav item at it and add an unread suffix:
 
   ```rust
@@ -535,34 +545,39 @@ In `views/sidebar/mod.rs`:
 
 ### 5.4 Click-through (P1)
 
-Reuse the single `RepoStore` that `RepoDetailView` already creates instead of making a second one:
-
-1. In `repo_detail/mod.rs`, add:
+Reuse the single `RepoStore` that `RepoDetailView` already creates instead of making a second one.
+The detail panels need a `Window`, and GPUI's `Entity::update_in` only exists on a `VisualContext`,
+which a synchronous `App` + `Window` pair is not - so the entry point is a free function rather than
+a `RepoDetailView::open_item` method. In `repo_detail/mod.rs`:
 
 ```rust
 pub(crate) enum RepoItem {
     Issue(EventId),
     PullRequest(EventId),
-       Patch(EventId),
+    Patch,
 }
 
-   impl RepoDetailView {
-       pub(crate) fn open_item(
-           &mut self,
+pub(crate) fn open_repo_item(
+    dock_area: &WeakEntity<DockArea>,
+    store: Entity<RepoStore>,
     item: RepoItem,
     window: &mut Window,
-           cx: &mut Context<Self>,
-       ) { /* open IssueDetailView / PullRequestDetailView in the dock */ }
-   }
+    cx: &mut App,
+) { /* new IssueDetailView / PullRequestDetailView, added to the center */ }
 ```
 
-2. `open_repo_panel` already returns `Entity<RepoDetailView>`; the caller invokes
-   `detail.update_in(window, cx, |detail, window, cx| detail.open_item(...))`.
-3. `InboxView` resolves `item.address` to an `Announcement` from `RepoListStore`, opens the repo
-   panel, then calls `open_item` with the root id and kind.
+- `RepoDetailView::store()` exposes its `Option<Entity<RepoStore>>`, so the caller reuses the repo
+  panel's store rather than building one. `views/mod.rs` re-exports `RepoItem` and `open_repo_item`.
+- `InboxView` resolves `item.address` to an `Announcement` from `RepoListStore`, calls
+  `open_repo_panel` (which returns `Entity<RepoDetailView>`), takes its store, and calls
+  `open_repo_item` with the root id and kind. The detail panel renders a "not found" placeholder
+  until the store's fetch lands, then re-renders.
+- The repository panel and the detail panel are two tabs of the center group; the detail is
+  activated. This matches the sidebar, which also opens a fresh repo panel per click.
 
 Patches have no detail view in Signed (they are only consumed inside `PullRequestDetailView`), so a
-patch-root click opens the repo panel. Note as a known limitation.
+patch-root click opens the repo panel only. `RepoItem::Patch` carries no id for that reason. A group
+whose root is not an issue/PR/patch, or whose repository is not in `RepoListStore`, opens nothing.
 
 ## 6. File-by-file change list
 
@@ -578,13 +593,10 @@ patch-root click opens the repo panel. Note as a known limitation.
 | `crates/signed_state/src/refresh.rs` | doc comment lists `Inbox` among the `RefreshGate` users |
 | `crates/signed_state/src/lib.rs` | `mod inbox;`, re-export `Inbox` and `query_inbox`; re-export `RefreshGate` (no global install) |
 | `crates/dock/src/lib.rs` | `add_bottom_panel` helper |
-| `crates/workspace/src/views/inbox.rs` | **new**: `InboxView` home panel owning the derived lists directly (`InboxFilterView` is Phase 3) |
-| `crates/workspace/src/views/mod.rs` | `mod inbox; pub use inbox::InboxView;` |
-| `crates/workspace/src/views/sidebar/mod.rs` | `inbox`/`unread` fields, `open_inbox`, nav wiring and badge, `create_repo_dialog` visibility |
-| `crates/workspace/src/views/repo_detail/mod.rs` | `RepoItem`, `RepoDetailView::open_item` (P1) |
-
-`create_repo_dialog` changes from private (`mod`) to `pub(crate) mod` inside `sidebar`, so the inbox's
-New button can open it.
+| `crates/workspace/src/views/inbox.rs` | **new**: `InboxView` home panel owning the derived lists directly, the `InboxFilterView` bottom-dock sub-view for Unread / Archived, and the notification click-through |
+| `crates/workspace/src/views/mod.rs` | `mod inbox; pub use inbox::InboxView;`; re-export `RepoItem`, `open_repo_item`, `open_repo_panel` |
+| `crates/workspace/src/views/sidebar/mod.rs` | `inbox`/`unread` fields, `open_inbox`, nav wiring and badge |
+| `crates/workspace/src/views/repo_detail/mod.rs` | `RepoItem`, `open_repo_item`, `RepoDetailView::store()` |
 
 No changes to `desktop` or `signed_nostr`. `signed_state::init` gains no parameters; `Backend::sync_inbox`
 activates the `Inbox` child entity at each signer transition.
@@ -604,7 +616,9 @@ activates the `Inbox` child entity at each signer transition.
 3. **Phase 2 - screen**: `InboxView` (inbox + activity), sidebar nav and badge.
    **DONE.** See the implementation notes below.
 4. **Phase 3 - sub-views**: `add_bottom_panel` and `InboxFilterView` for Unread / Archived.
-5. **Phase 4 - click-through**: `open_item` and announcement lookup.
+   **DONE.** See the implementation notes below.
+5. **Phase 4 - click-through**: `open_item` and announcement lookup. **DONE.** See the implementation
+   notes below.
 6. **Phase 5 (optional)**: standalone notifications page, NIP-65 relays, pagination, patch detail
    view.
 
@@ -720,6 +734,63 @@ The `InboxStore` entity was then folded into `InboxView`, since the panel was it
 Trade-off: the sidebar badge is only current after the inbox is opened once, because the unread
 count is derived by the panel.
 
+### Phase 3 implementation notes
+
+Files: `crates/dock/src/lib.rs` and `crates/workspace/src/views/{inbox.rs, sidebar/mod.rs}`. No
+store changes.
+
+- `add_bottom_panel` sits next to `add_center_panel` and wraps
+  `DockArea::add_panel_view(panel, DockPlacement::Bottom, None, ...)`. A new bottom dock starts open,
+  and the workspace's existing `DockEvent::LayoutChanged` subscription removes an emptied bottom dock,
+  so a closed sub-view leaves no strip behind.
+- `InboxFilterView` is private to `views/inbox.rs`. It holds an `Entity<InboxView>` (strong; the
+  panel keeps only the weak `filter_view` back, so there is no cycle), the mode, and its own
+  `ListState`. There is no subscription: it reads the inbox entity during render, which is enough for
+  GPUI to invalidate the window when the inbox notifies.
+- `InboxFilter` is a private two-variant enum with `label()` and `matches(&InboxItem)`. The tab title
+  comes from `Panel::title`, so switching modes through `set_mode` retitles the same tab instead of
+  opening a second one.
+- `InboxView` regained a `dock_area: WeakEntity<DockArea>` (removed with the My-repositories column)
+  and takes it in `new`. `open_filter` reuses the existing panel, focuses it, and reopens the bottom
+  dock when it is collapsed; otherwise it creates and adds the panel. `InboxView::new` is now called
+  as `InboxView::new(self.dock_area.clone(), cx)` from `SidebarPanel::open_inbox`.
+- The three `#[allow(dead_code)]` markers on `mark_read`, `mark_archived` and `group_events` are gone:
+  Unread rows call `mark_read` on click and `mark_archived` from a trailing ghost icon button
+  (`Button` + `IconName::FolderClosed`, tooltip "Archive"). The button calls `cx.stop_propagation()`
+  so it does not also trigger the row's mark-read click. Archived rows are display-only; the read
+  state has no un-archive operation.
+- `notification_row` takes an id `prefix` and returns `Stateful<Div>` rather than `AnyElement`, so
+  callers can attach a click handler and a trailing action. The inbox list passes `"inbox-row"` and
+  the sub-view `"inbox-filter-row"`, because the two lists render in the same window and would
+  otherwise collide on `(str, ix)` ids.
+- `cargo clippy -p workspace -p dock --all-targets` is clean, `cargo check --workspace --all-targets`
+  succeeds, and `cargo test -p signed_core -p signed_state -p workspace` passes (68 / 24 / 7).
+
+### Phase 4 implementation notes
+
+Files: `crates/workspace/src/views/{inbox.rs, mod.rs, repo_detail/mod.rs}`. No store changes.
+
+- `RepoItem { Issue(EventId), PullRequest(EventId), Patch }` and `pub(crate) fn open_repo_item` live
+  in `repo_detail/mod.rs`, next to `open_repo_panel`. `open_repo_item` takes the store as a
+  parameter, avoiding a second `RepoStore`.
+- It is a free function, not `RepoDetailView::open_item`: the detail constructors take a `Window`, and
+  a synchronous `&mut App` + `&mut Window` pair is not a `VisualContext`, so `Entity::update_in` is
+  not available. `InboxView` already has the window in the list's `on_click`, so it drives the free
+  function directly. The plan's original `detail.update_in(window, cx, ...)` sketch could not compile.
+- `RepoDetailView::store()` (`pub(crate)`) exposes the panel's `Option<Entity<RepoStore>>`. The repo
+  panel is opened first and its store reused, so the detail panel shares one store with the repo it
+  came from.
+- `InboxView::open_item` is also a free function (it needs nothing but `dock_area`, which it captures
+  from the panel) because the `gpui::list` item closure only receives `&mut App`. It resolves
+  `item.address` through `RepoListStore`, returns silently when the repository is unknown, opens the
+  repo panel, then maps the root kind to a `RepoItem` and calls `open_repo_item`.
+- Only the main notification list is clickable. Unread rows keep their Phase 3 behaviour (click marks
+  read, trailing button archives). Activity rows are unchanged.
+- `RepoItem::Patch` is a unit variant because the id would be unused: patches have no detail panel, so
+  `open_repo_item` returns before doing anything and only the repository panel opens.
+- `cargo clippy -p workspace --all-targets` is clean, `cargo check --workspace --all-targets` succeeds,
+  and `cargo test -p signed_core -p signed_state -p workspace -p dock` passes (68 / 24 / 7 / 1).
+
 ## 8. Validation
 
 - `cargo test -p signed_core` (68 tests): root resolution, grouping, read-state cutoff, serde round-trip.