feat: add Inbox sidebar section showing unlinked notes

Inbox shows notes without valid outgoing relationships (body wikilinks
or frontmatter refs), helping users find captured but unorganized notes.
Includes time-period filter pills (This week/month/quarter/All time),
Cmd+K command, and macOS menu bar entry. Broken wikilinks (targeting
non-existent notes) are not counted as relationships.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/note-list/InboxFilterPills.tsx

@@ -0,0 +1,44 @@
+import { memo } from 'react'
+import type { InboxPeriod } from '../../types'
+
+interface InboxFilterPillsProps {
+  active: InboxPeriod
+  counts: Record<InboxPeriod, number>
+  onChange: (period: InboxPeriod) => void
+}
+
+const PILLS: { value: InboxPeriod; label: string }[] = [
+  { value: 'week', label: 'This week' },
+  { value: 'month', label: 'This month' },
+  { value: 'quarter', label: 'This quarter' },
+  { value: 'all', label: 'All time' },
+]
+
+function InboxFilterPillsInner({ active, counts, onChange }: InboxFilterPillsProps) {
+  return (
+    <div className="flex h-[45px] shrink-0 items-center gap-1 border-b border-border px-4" data-testid="inbox-filter-pills">
+      {PILLS.map(({ value, label }) => (
+        <button
+          key={value}
+          type="button"
+          role="tab"
+          aria-selected={active === value}
+          className={`inline-flex items-center gap-1.5 rounded-full border px-2.5 py-0.5 text-[12px] font-medium transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring ${
+            active === value
+              ? 'border-foreground/20 bg-foreground/10 text-foreground'
+              : 'border-transparent text-muted-foreground hover:bg-muted hover:text-foreground'
+          }`}
+          onClick={() => onChange(value)}
+          data-testid={`inbox-pill-${value}`}
+        >
+          {label}
+          <span className={`text-[10px] tabular-nums ${active === value ? 'text-foreground/70' : 'text-muted-foreground/70'}`}>
+            {counts[value]}
+          </span>
+        </button>
+      ))}
+    </div>
+  )
+}
+
+export const InboxFilterPills = memo(InboxFilterPillsInner)

src/components/note-list/NoteListViews.tsx

@@ -11,11 +11,12 @@ function ListViewHeader({ isTrashView, expiredTrashCount }: {
   return <TrashWarningBanner expiredCount={isTrashView ? expiredTrashCount : 0} />
 }
 
-function resolveEmptyText(isChangesView: boolean, changesError: string | null | undefined, isTrashView: boolean, isArchivedView: boolean, query: string): string {
+function resolveEmptyText(isChangesView: boolean, changesError: string | null | undefined, isTrashView: boolean, isArchivedView: boolean, isInboxView: boolean, query: string): string {
   if (isChangesView && changesError) return `Failed to load changes: ${changesError}`
   if (isChangesView) return 'No pending changes'
   if (isTrashView) return 'Trash is empty'
   if (isArchivedView) return 'No archived notes'
+  if (isInboxView) return query ? 'No matching notes' : 'All notes are organized'
   return query ? 'No matching notes' : 'No notes found'
 }
 
@@ -39,13 +40,13 @@ export function EntityView({ entity, groups, query, collapsedGroups, sortPrefs,
   )
 }
 
-export function ListView({ isTrashView, isArchivedView, isChangesView, changesError, expiredTrashCount, deletedCount = 0, searched, query, renderItem, virtuosoRef }: {
-  isTrashView: boolean; isArchivedView?: boolean; isChangesView?: boolean; changesError?: string | null; expiredTrashCount: number
+export function ListView({ isTrashView, isArchivedView, isChangesView, isInboxView, changesError, expiredTrashCount, deletedCount = 0, searched, query, renderItem, virtuosoRef }: {
+  isTrashView: boolean; isArchivedView?: boolean; isChangesView?: boolean; isInboxView?: boolean; changesError?: string | null; expiredTrashCount: number
   deletedCount?: number; searched: VaultEntry[]; query: string
   renderItem: (entry: VaultEntry) => React.ReactNode
   virtuosoRef?: React.RefObject<VirtuosoHandle | null>
 }) {
-  const emptyText = resolveEmptyText(!!isChangesView, changesError ?? null, isTrashView, !!isArchivedView, query)
+  const emptyText = resolveEmptyText(!!isChangesView, changesError ?? null, isTrashView, !!isArchivedView, !!isInboxView, query)
   const hasHeader = isTrashView && expiredTrashCount > 0
   const hasDeletedOnly = !!isChangesView && deletedCount > 0 && searched.length === 0
 

src/components/note-list/noteListHooks.ts

@@ -3,10 +3,11 @@ import type { VaultEntry, SidebarSelection, ModifiedFile, NoteStatus } from '../
 import {
   type SortOption, type SortDirection, type SortConfig, type NoteListFilter,
   getSortComparator, extractSortableProperties,
-  buildRelationshipGroups, filterEntries,
+  buildRelationshipGroups, filterEntries, filterInboxEntries,
   loadSortPreferences, saveSortPreferences,
   parseSortConfig, serializeSortConfig, clearListSortFromLocalStorage,
 } from '../../utils/noteListHelpers'
+import type { InboxPeriod } from '../../types'
 import { buildTypeEntryMap } from '../../utils/typeColors'
 import { filterByQuery, filterGroupsByQuery, countExpiredTrash, createNoteStatusResolver, isModifiedEntry } from './noteListUtils'
 import type { MultiSelectState } from '../../hooks/useMultiSelect'
@@ -19,14 +20,16 @@ export function useTypeEntryMap(entries: VaultEntry[]) {
 
 // --- useFilteredEntries ---
 
-export function useFilteredEntries(entries: VaultEntry[], selection: SidebarSelection, modifiedPathSet: Set<string>, modifiedSuffixes: string[], subFilter?: NoteListFilter) {
+export function useFilteredEntries(entries: VaultEntry[], selection: SidebarSelection, modifiedPathSet: Set<string>, modifiedSuffixes: string[], subFilter?: NoteListFilter, inboxPeriod?: InboxPeriod) {
   const isEntityView = selection.kind === 'entity'
   const isChangesView = selection.kind === 'filter' && selection.filter === 'changes'
+  const isInboxView = selection.kind === 'filter' && selection.filter === 'inbox'
   return useMemo(() => {
     if (isEntityView) return []
     if (isChangesView) return entries.filter((e) => isModifiedEntry(e.path, modifiedPathSet, modifiedSuffixes))
+    if (isInboxView) return filterInboxEntries(entries, inboxPeriod ?? 'month')
     return filterEntries(entries, selection, subFilter)
-  }, [entries, selection, isEntityView, isChangesView, modifiedPathSet, modifiedSuffixes, subFilter])
+  }, [entries, selection, isEntityView, isChangesView, isInboxView, modifiedPathSet, modifiedSuffixes, subFilter, inboxPeriod])
 }
 
 // --- useNoteListData ---
@@ -36,14 +39,15 @@ interface NoteListDataParams {
   query: string; listSort: SortOption; listDirection: SortDirection
   modifiedPathSet: Set<string>; modifiedSuffixes: string[]
   subFilter?: NoteListFilter
+  inboxPeriod?: InboxPeriod
 }
 
-export function useNoteListData({ entries, selection, query, listSort, listDirection, modifiedPathSet, modifiedSuffixes, subFilter }: NoteListDataParams) {
+export function useNoteListData({ entries, selection, query, listSort, listDirection, modifiedPathSet, modifiedSuffixes, subFilter, inboxPeriod }: NoteListDataParams) {
   const isEntityView = selection.kind === 'entity'
   const isTrashView = (selection.kind === 'filter' && selection.filter === 'trash') || subFilter === 'trashed'
   const isArchivedView = (selection.kind === 'filter' && selection.filter === 'archived') || subFilter === 'archived'
 
-  const filteredEntries = useFilteredEntries(entries, selection, modifiedPathSet, modifiedSuffixes, subFilter)
+  const filteredEntries = useFilteredEntries(entries, selection, modifiedPathSet, modifiedSuffixes, subFilter, inboxPeriod)
 
   const searched = useMemo(() => {
     const sorted = [...filteredEntries].sort(getSortComparator(listSort, listDirection))
@@ -125,11 +129,12 @@ export interface UseNoteListSortParams {
   modifiedPathSet: Set<string>
   modifiedSuffixes: string[]
   subFilter?: NoteListFilter
+  inboxPeriod?: InboxPeriod
   onUpdateTypeSort?: (path: string, key: string, value: string | number | boolean | string[] | null) => void
   updateEntry?: (path: string, patch: Partial<VaultEntry>) => void
 }
 
-export function useNoteListSort({ entries, selection, modifiedPathSet, modifiedSuffixes, subFilter, onUpdateTypeSort, updateEntry }: UseNoteListSortParams) {
+export function useNoteListSort({ entries, selection, modifiedPathSet, modifiedSuffixes, subFilter, inboxPeriod, onUpdateTypeSort, updateEntry }: UseNoteListSortParams) {
   const [sortPrefs, setSortPrefs] = useState<Record<string, SortConfig>>(loadSortPreferences)
 
   const typeDocument = useMemo(() => {
@@ -157,7 +162,7 @@ export function useNoteListSort({ entries, selection, modifiedPathSet, modifiedS
     }
   }, [typeDocument, persistence])
 
-  const filteredEntries = useFilteredEntries(entries, selection, modifiedPathSet, modifiedSuffixes, subFilter)
+  const filteredEntries = useFilteredEntries(entries, selection, modifiedPathSet, modifiedSuffixes, subFilter, inboxPeriod)
   const customProperties = useMemo(() => extractSortableProperties(filteredEntries), [filteredEntries])
   const listSort = useMemo<SortOption>(() => deriveEffectiveSort(listConfig.option, customProperties), [listConfig.option, customProperties])
   const listDirection = listSort === listConfig.option ? listConfig.direction : 'desc'

src/components/note-list/noteListUtils.ts

@@ -7,6 +7,7 @@ export function resolveHeaderTitle(selection: SidebarSelection, typeDocument: Va
   if (selection.kind === 'filter' && selection.filter === 'archived') return 'Archive'
   if (selection.kind === 'filter' && selection.filter === 'trash') return 'Trash'
   if (selection.kind === 'filter' && selection.filter === 'changes') return 'Changes'
+  if (selection.kind === 'filter' && selection.filter === 'inbox') return 'Inbox'
   return 'Notes'
 }