Merge branch 'mai/kahn/phase-5i-phase-a-design' (phase 5i slice A: project filter dim + descendants toggle)

# Conflicts:
#	web/dashboard.go
#	web/server.go
#	web/templates/dashboard_section.tmpl

web/server_test.go

@@ -294,3 +294,71 @@ func TestMultiParentBothPathsRouteToSameRow(t *testing.T) {
 		}
 	}
 }
+
+// TestProjectFilterScopesTreeToDescendants verifies the Phase 5i Slice A
+// project scope semantics end-to-end: ?project=<path> narrows / to the picked
+// item + descendants; ?project_descendants=0 narrows further to the picked
+// item alone. Both round-trip through ParseTreeFilter + TreeFilter.Matches +
+// the tree handler.
+func TestProjectFilterScopesTreeToDescendants(t *testing.T) {
+	srv, pool := mustServer(t)
+	defer pool.Close()
+	h := srv.Routes()
+	ctx := context.Background()
+
+	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
+	parentSlug := "p5i-parent-" + stamp
+	childSlug := "p5i-child-" + stamp
+	siblingSlug := "p5i-sib-" + stamp
+
+	var dev string
+	if err := pool.QueryRow(ctx, `select id from projax.items where slug='dev' and cardinality(parent_ids)=0`).Scan(&dev); err != nil {
+		t.Fatalf("dev: %v", err)
+	}
+	var parentID, childID, siblingID string
+	if err := pool.QueryRow(ctx,
+		`insert into projax.items (kind, title, slug, parent_ids) values (array['project']::text[], 'P5i Parent', $1, ARRAY[$2]::uuid[]) returning id`,
+		parentSlug, dev).Scan(&parentID); err != nil {
+		t.Fatalf("seed parent: %v", err)
+	}
+	if err := pool.QueryRow(ctx,
+		`insert into projax.items (kind, title, slug, parent_ids) values (array['project']::text[], 'P5i Child', $1, ARRAY[$2]::uuid[]) returning id`,
+		childSlug, parentID).Scan(&childID); err != nil {
+		t.Fatalf("seed child: %v", err)
+	}
+	if err := pool.QueryRow(ctx,
+		`insert into projax.items (kind, title, slug, parent_ids) values (array['project']::text[], 'P5i Sib', $1, ARRAY[$2]::uuid[]) returning id`,
+		siblingSlug, dev).Scan(&siblingID); err != nil {
+		t.Fatalf("seed sibling: %v", err)
+	}
+	defer pool.Exec(context.Background(), `delete from projax.items where id in ($1,$2,$3)`, childID, parentID, siblingID)
+
+	parentPath := "dev." + parentSlug
+	parentLink := `href="/i/` + parentPath + `"`
+	childLink := `href="/i/` + parentPath + `.` + childSlug + `"`
+	siblingLink := `href="/i/dev.` + siblingSlug + `"`
+
+	// Descendants on (default): parent + child visible, sibling hidden.
+	_, withDesc := get(t, h, "/?project="+parentPath)
+	if !strings.Contains(withDesc, parentLink) {
+		t.Errorf("?project=%s should show parent row", parentPath)
+	}
+	if !strings.Contains(withDesc, childLink) {
+		t.Errorf("?project=%s should include descendant child row", parentPath)
+	}
+	if strings.Contains(withDesc, siblingLink) {
+		t.Errorf("?project=%s should exclude sibling row", parentPath)
+	}
+
+	// Descendants off: only the picked item, no children.
+	_, noDesc := get(t, h, "/?project="+parentPath+"&project_descendants=0")
+	if !strings.Contains(noDesc, parentLink) {
+		t.Errorf("?project_descendants=0 should still show the picked parent row")
+	}
+	if strings.Contains(noDesc, childLink) {
+		t.Errorf("?project_descendants=0 should hide the child row")
+	}
+	if strings.Contains(noDesc, siblingLink) {
+		t.Errorf("?project_descendants=0 should hide the sibling row")
+	}
+}