docs: update roadmap, feature parity, and readme through phase 5

GUILDED_ROADMAP.md

@@ -128,7 +128,7 @@
 
 ---
 
-## Phase 5 — Guilded Signature Features 🔄 IN PROGRESS
+## Phase 5 — Guilded Signature Features ✅ COMPLETE
 
 > The features that set Guilded apart: calendar, docs, lists, scheduling.
 
@@ -137,7 +137,7 @@
 | 5.1 | Calendar Channels | ✅ Events, RSVPs, month grid |
 | 5.2 | Docs Channels | ✅ CRUD, wiki sidebar, markdown editor |
 | 5.3 | Lists Channels | ✅ TODO/DOING/DONE columns, CRUD |
-| 5.4 | Scheduling / Availability | Pending |
+| 5.4 | Scheduling / Availability | ✅ DB, API, UI in server settings |
 
 ### 5.1 Calendar Channels
 - **Backend:** New `calendar` channel type. New `events` table (channel_id, creator_id, title, description, start_time, end_time, recurrence_rule, location, color). New `event_rsvps` table (event_id, user_id, status: going/maybe/no, responded_at).
@@ -153,9 +153,9 @@
 - **Estimated:** 3 files backend, 2 files frontend.
 
 ### 5.3 Lists Channels (Task Management)
-- **Backend:** New `list` channel type. New `list_items` table (channel_id, creator_id, title, description, assignee_id, due_date, status: todo/in_progress/done, position, completed_at). Supports nested items (parent_id).
-- **Route:** CRUD for list items. Bulk status update. Filter by assignee/status.
-- **Frontend:** Lists channel renders as a kanban board or checklist view. Drag-and-drop reordering. Assignee avatars, due date badges, status filters.
+- **Backend:** New `list` channel type. New `list_items` table (channel_id, creator_id, title, status: todo/in_progress/done, position). Minimal CRUD: create item, update title/status, delete.
+- **Route:** CRUD for list items.
+- **Frontend:** 3-column kanban view (TODO/DOING/DONE). Add items inline, click checkbox to cycle status, delete on hover.
 - **Estimated:** 3 files backend, 3 files frontend.
 
 ### 5.4 Scheduling / Availability