memory isolation fix and session grouping in client

docs/services/chat-client.md

@@ -92,14 +92,14 @@ src/
 │   └── useContextMenu.js    # Right-click context menu position and visibility
 ├── components/
 │   ├── App.jsx              # Root component — layout, shared state, view routing
-│   ├── Sidebar.jsx          # Left sidebar — projects, recent chats, navigation
+│   ├── Sidebar.jsx          # Left sidebar — projects, grouped recent chats, navigation
 │   ├── HomeView.jsx         # Landing screen — greeting, centred input, quick actions
-│   ├── ChatWindow.jsx       # Centre panel — message thread and input bar
+│   ├── ChatWindow.jsx       # Centre panel — message thread, back button, model pill
 │   ├── MessageBubble.jsx    # Individual message bubble — renders markdown via react-markdown
 │   ├── InfoPanel.jsx        # Right panel — model selector and session metadata (slide-in)
 │   ├── SessionModal.jsx     # Modal for session rename, project assignment, delete
 │   ├── ProjectModal.jsx     # Modal for project create, edit, delete
-│   ├── AllChatsView.jsx     # Full paginated session list with multi-select bulk delete
+│   ├── AllChatsView.jsx     # Paginated session list with project indicator column
 │   ├── AllProjectsView.jsx  # Project tile grid with create/edit/delete; tile click navigates to ProjectView
 │   ├── ProjectView.jsx      # Individual project — conversations, new chat input, memory
 │   │                        #   placeholder, user notes, ⋮ edit/delete menu
@@ -129,8 +129,13 @@ panel are persistent across all views.
 │  All Projects →  │  memory       → MemoryView    │
 │                  │                               │
 │ RECENT CHATS ▾   │                               │
-│  Session 1       │                               │
-│  Session 2       │                               │
+│  ● Project A     │                               │
+│    Session 1     │                               │
+│    Session 2     │                               │
+│  ● Project B     │                               │
+│    Session 3     │                               │
+│  Other           │                               │
+│    Session 4     │                               │
 │  All Chats →     │                               │
 │                  │                               │
 │ ⚙ Settings       │                               │
@@ -167,13 +172,17 @@ leaving `'home'` expands it.
 
 ## Home View
 
-`HomeView` is the landing screen shown on initial load and when there are no
-active sessions. It displays:
+`HomeView` is the landing screen shown on initial load. It displays:
 - Time-based greeting ("Morning / Afternoon / Evening, Tim")
 - Currently loaded model name (from `modelProps.modelAlias`, stripped of `.gguf`)
 - Centred textarea input — sending creates a new session and navigates to chat
 - Quick action pills that populate the input without auto-sending
 
+Sending from HomeView uses `handleHomeSend` in `App.jsx`, which calls
+`createSession()` (returns the new session object), then immediately calls
+`sendMessage` with the session passed directly as a parameter — avoiding the
+React state settling race condition that would cause the message to be dropped.
+
 ## CSS Architecture
 
 Styles follow a hybrid approach — CSS utility classes for static reusable
@@ -225,6 +234,11 @@ are written into the active assistant bubble token by token via
 `updateLastMessage`. The blinking cursor in `MessageBubble` is shown while
 `message.streaming === true`.
 
+`useChat.sendMessage` accepts an optional `session` parameter (4th arg) that
+overrides the closed-over `activeSession`. This is used by `handleHomeSend`
+and `handleNewProjectChat` in `App.jsx` to pass the newly created session
+object directly, avoiding React state settling races.
+
 `useChat` accepts an optional `projectId` parameter in `sendMessage`. After
 the first message completes in a new session, if `projectId` is set,
 `updateSession` is called to write the project assignment to the backend.
@@ -236,6 +250,9 @@ the `uuid` package. New sessions are created locally and auto-registered in
 the memory service on the first message. The session list refreshes after
 each completed response to surface newly created sessions.
 
+`useSession.createSession` returns the new session object — callers can pass
+it directly to `sendMessage` rather than waiting for React state to update.
+
 `useSession.selectSession` skips the history fetch for new (`isNew: true`)
 sessions — fetching history for an unsaved session would 404 since it doesn't
 exist in the backend yet.
@@ -267,6 +284,16 @@ mode, and delete confirmation in `confirm-delete` mode.
 - Dynamic `updateSession` SQL builds `SET` clause from only the fields passed — prevents accidental overwrites
 - `AllChatsView` pagination uses `CLIENT_DEFAULTS.PAGE_SIZE` (not `API_DEFAULTS.PAGE_SIZE` which doesn't exist)
 
+## Sidebar — Session Grouping
+
+Recent sessions in the sidebar are grouped by project under a colour dot +
+project name label. Unassigned sessions appear under "Other" if any project
+groups are present. The grouping is computed client-side from the `sessions`
+array and `projects` list already available in `App.jsx` — no extra API call.
+
+`AllChatsView` receives `projects` as a prop from `App.jsx` and displays a
+project indicator column (colour dot + truncated name) in each session row.
+
 ## Project Management
 
 All projects are isolated by default (`isolated: 1` hardcoded on create).