feat: Inbox view — outstanding tasks with no project (§8.2)

A sixth built-in filter view (listed below On Deck) showing every
outstanding task filed under no project — the capture inbox to triage. New
ListFilter.unfiled predicate kept purely in matches(); the inbox ViewSpec is
un-gated (no attention/do-date filter) so nothing hides from triage. Surfaces
automatically in the heph-tui sidebar and `heph view`. Tests cover the
predicate and the view spec; navigation tests updated for the 6th view.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

crates/heph-core/src/filter.rs

@@ -3,10 +3,11 @@
 //! A view is a **predicate expressed as data** (mirroring §7's "order as
 //! data"): the engine [`Store::list`](crate::store::Store::list) takes a
 //! [`ListFilter`] and returns the matching outstanding tasks as
-//! [`RankedTask`] rows. The five built-in [`ViewSpec`]s (Top of Mind / Tasks /
+//! [`RankedTask`] rows. The built-in [`ViewSpec`]s (Top of Mind / Tasks /
 //! Work Tasks / Chores / On Deck) are derived from the owner's Todoist filter
 //! queries (see `docs/explanation/design.md` §6.2.1) and realized in heph terms
-//! (attention: p1→red, p2→orange, p4→white, p3→blue).
+//! (attention: p1→red, p2→orange, p4→white, p3→blue), plus an **Inbox** of
+//! project-less tasks to triage.
 
 use serde::{Deserialize, Serialize};
 
@@ -36,6 +37,9 @@ pub struct ListFilter {
     pub exclude_projects: Vec<String>,
     /// Apply the §7 do-date candidacy gate: `do_date` is `None` or `<= now`.
     pub actionable: bool,
+    /// Keep only tasks with **no project** — the capture "Inbox" to triage and
+    /// file. (Pairs naturally with an empty `scope`; a scoped Inbox is empty.)
+    pub unfiled: bool,
 }
 
 impl ListFilter {
@@ -70,6 +74,9 @@ impl ListFilter {
         if self.actionable && task.do_date.is_some_and(|d| d > now) {
             return false;
         }
+        if self.unfiled && task.project_id.is_some() {
+            return false;
+        }
         true
     }
 }
@@ -94,12 +101,14 @@ pub struct ViewSpec {
     pub exclude_names: &'static [&'static str],
     /// Whether the §7 do-date candidacy gate applies.
     pub actionable: bool,
+    /// Whether to keep only project-less tasks (see [`ListFilter::unfiled`]).
+    pub unfiled: bool,
 }
 
-/// The five built-in views (tech-spec §8.2), each realized from the verbatim
-/// Todoist query in design §6.2.1.
+/// The built-in views (tech-spec §8.2): five realized from the verbatim
+/// Todoist query in design §6.2.1, plus an Inbox of project-less tasks.
 // Sidebar / `heph view` order (owner's preference): Top of Mind, Tasks,
-// Work Tasks, Chores, On Deck.
+// Work Tasks, Chores, On Deck, Inbox.
 pub const BUILTIN_VIEWS: &[ViewSpec] = &[
     // (p1|p2) & (no date|today|overdue)
     ViewSpec {
@@ -110,6 +119,7 @@ pub const BUILTIN_VIEWS: &[ViewSpec] = &[
         scope_names: &[],
         exclude_names: &[],
         actionable: true,
+        unfiled: false,
     },
     // !p3 & (…) & !(#Daily Routine|#Work Routine|#Chores|#Camano Chores|#Work|…) & !subtask
     ViewSpec {
@@ -126,6 +136,7 @@ pub const BUILTIN_VIEWS: &[ViewSpec] = &[
             "Daily Routine",
         ],
         actionable: true,
+        unfiled: false,
     },
     // #Work & !p3 & (…) & !subtask
     ViewSpec {
@@ -136,6 +147,7 @@ pub const BUILTIN_VIEWS: &[ViewSpec] = &[
         scope_names: &["Work"],
         exclude_names: &[],
         actionable: true,
+        unfiled: false,
     },
     // (today|overdue|no date) & (#Chores|#Camano Chores)
     ViewSpec {
@@ -146,6 +158,7 @@ pub const BUILTIN_VIEWS: &[ViewSpec] = &[
         scope_names: &["Chores", "Camano Chores"],
         exclude_names: &[],
         actionable: true,
+        unfiled: false,
     },
     // p3 & (no date|overdue|today)
     ViewSpec {
@@ -156,6 +169,19 @@ pub const BUILTIN_VIEWS: &[ViewSpec] = &[
         scope_names: &[],
         exclude_names: &[],
         actionable: true,
+        unfiled: false,
+    },
+    // Tasks filed under no project — the capture inbox to triage and file. Shows
+    // everything unfiled (no attention/do-date gate) so nothing hides from triage.
+    ViewSpec {
+        name: "inbox",
+        title: "Inbox",
+        attention_in: &[],
+        attention_not: &[],
+        scope_names: &[],
+        exclude_names: &[],
+        actionable: false,
+        unfiled: true,
     },
 ];
 
@@ -241,6 +267,26 @@ mod tests {
         assert!(!f.matches(&none, NOW));
     }
 
+    #[test]
+    fn unfiled_keeps_only_projectless_tasks() {
+        let f = ListFilter {
+            unfiled: true,
+            ..Default::default()
+        };
+        let none = task("none");
+        let mut filed = task("filed");
+        filed.project_id = Some("work".into());
+        assert!(f.matches(&none, NOW));
+        assert!(!f.matches(&filed, NOW));
+    }
+
+    #[test]
+    fn inbox_view_is_unfiled_and_ungated() {
+        let spec = builtin("inbox").expect("inbox view exists");
+        assert!(spec.unfiled);
+        assert!(!spec.actionable);
+    }
+
     #[test]
     fn exclude_drops_listed_projects_but_keeps_projectless() {
         let f = ListFilter {
@@ -276,6 +322,7 @@ mod tests {
         assert_eq!(builtin("tom").unwrap().title, "Top of Mind");
         assert_eq!(builtin("ondeck").unwrap().attention_in, &[Attention::Blue]);
         assert!(builtin("nope").is_none());
-        assert_eq!(BUILTIN_VIEWS.len(), 5);
+        assert_eq!(builtin("inbox").unwrap().title, "Inbox");
+        assert_eq!(BUILTIN_VIEWS.len(), 6);
     }
 }

crates/heph-core/src/sqlite/tasks.rs

@@ -416,6 +416,7 @@ pub(super) fn view(
         scope,
         exclude_projects,
         actionable: spec.actionable,
+        unfiled: spec.unfiled,
     };
     list(conn, owner, now, &filter)
 }

crates/heph-tui/tests/navigation.rs

@@ -179,8 +179,8 @@ fn moving_the_sidebar_switches_the_task_list() {
 #[test]
 fn sidebar_skips_headers_into_the_projects_section() {
     let mut app = App::new(fixture()).unwrap();
-    // 5 built-in views: step down 5 times crosses the "Projects" header to p1.
-    for _ in 0..5 {
+    // 6 built-in views: step down 6 times crosses the "Projects" header to p1.
+    for _ in 0..6 {
         app.move_sidebar(1);
     }
     assert_eq!(app.task_pane_title(), "Camano");
@@ -231,7 +231,7 @@ fn quick_add_files_under_the_current_project_when_no_tag_given() {
     let mut app = App::new(fake).unwrap();
 
     // Select the project so the new task is filed there.
-    for _ in 0..5 {
+    for _ in 0..6 {
         app.move_sidebar(1);
     }
     assert_eq!(app.task_pane_title(), "Camano");

docs/changelog.d/v1-inbox-view.feature.md

@@ -0,0 +1 @@
+- **Inbox view** (§8.2): a sixth built-in filter view, listed below On Deck, showing every outstanding task with **no project** — the capture inbox to triage and file. A new `ListFilter.unfiled` predicate (kept purely in `matches()`) drives it; the `inbox` `ViewSpec` is deliberately un-gated (no attention or do-date filter) so nothing hides from triage. Appears automatically in the `heph-tui` sidebar and `heph view`; `heph view inbox` from the CLI.