v0.1.0

First tagged release of LifeTree — the "life decision tree" intelligent
decision support system. This version ships the MVP foundations: goal
management, knowledge graph, scenario branching, AI advisor, plugin
system, PWA support, multi-user auth, and i18n.

Added

Authentication & Multi-user

• Email + password auth with JWT access/refresh tokens, plus optional
  email-verification (send-code / register-with-code) flow.
• OAuth login (Google / GitHub / Microsoft) with /auth/oauth/{id}/start
  and /auth/oauth/{id}/callback.
• Two use modes: single (default, no login required) and multi
  (login required, admin role gated by LIFETREE_ADMIN_USER_IDS).
  Toggleable via PUT /settings/use-mode.
• Admin endpoints: GET/PATCH/DELETE /admin/users, GET /admin/stats.
• AuthGate: in single-user mode the app runs without prompting login;
  in multi-user mode the login dialog is non-dismissible.
• User data isolation by user_id (events, sources, plugins, chat
  conversations partitioned in localStorage by lifetree.chat.conversations.v2.<userId>).

Plugins

• User-uploaded plugin system: POST /plugins/upload with AST syntax
  check, contract validation, and import blacklist (os, subprocess,
  socket, ctypes, pickle, importlib, …). Stored under
  plugins/user_uploaded/{plugin_id}.py with metadata in the
  user_plugins table.
• DELETE /plugins/{id} (soft-delete) and PATCH /plugins/{id}/enabled.
• Docker named volume for /app/plugins/user_uploaded/ so custom
  scripts persist across container restarts.
• Built-in sample plugins: sample_rss_feed, sample_web_scraper.

Notifications & SMTP

• Notifications API with severity (urgent/warning/info), status
  (read/unread), channel filters; bulk mark-read and unread-count.
• SMTP configuration in settings (server, port, username, password,
  sender email/name, TLS/SSL), with send-test-email functionality
  (permission-checked before sending).
• Real-time SSE push for new notifications.

i18n

• Six locales: 简体中文 (default), 繁體中文, English, Español, Deutsch,
  Français. Cookie-driven (lifetree.locale, 1-year validity) with
  navigator.language auto-detection. Fallback to zh-CN for missing
  keys.

PWA

• Installable PWA with manifest, service worker, and offline support.
• Drawer-mode sidebar: in PWA mode (or viewport < 1024px) the sidebar
  hides by default and is opened as a slide-in drawer via the per-page
  SidebarToggleButton. CSS pre-hydration fallback via inline script +
  html.pwa / html.drawer-mode classes prevents rail flash.
• Safe-area padding for notch / home indicator.
• iOS navigator.standalone detection (covers cases the display-mode
  media query misses).

AI Advisor & Chat

• Streaming SSE chat (POST /chat/stream) with token-by-token
  rendering and Markdown support. Direct backend connection bypasses
  the Next.js dev proxy (which buffers SSE).
• Conversation history sidebar with rename, new-conversation, and
  per-user scoping. Per-page SidebarToggleButton toggles the drawer
  in PWA / narrow viewport; persistent rail (w-16 ↔ w-60) otherwise.
• File upload on the chat page (POST /ingest/upload) with auth-token
  attachment via the shared request helper.
• Tool-call UI rendered inline within the main content (not at the
  start or end of the message).

Graph & Scenarios

• Knowledge graph with nodes/edges, minimap (!w-64 !h-40), and
  non-overlapping node/label layout.
• Scenario branching, merging, and running (POST /scenarios/{id}/branch,
  /merge, /run); scenario comparison tree view (color bars above
  nodes removed) and detail panel.
• Dashboard handles undefined goalId by returning null instead of
  calling the API with undefined.

Settings & Platform Config

• Settings page with SMTP config, send-test-email, API-key reveal
  (plaintext when eye button clicked — no "configured, enter new value
  to overwrite" stub), and deeply-nested colored capsule UI adapted
  for light theme.
• Admin-only platform configuration page for model and service
  APIs/keys (visible only to admin users).

Infra & CI/CD

• GitHub Actions build-and-push.yml: builds lifetree-backend and
  lifetree-frontend Docker images on main and v* tags, pushed
  to ghcr.io. Restricted to linux/amd64 (arm64 frontend build
  fails in CI).
• GitHub Actions release.yml: on v* tags, creates a GitHub Release
  with notes pulled from this CHANGELOG.
• Alembic migrations: initial schema, LLM config tables, user auth
  fields, user plugins table, user_id added to events/sources/plugins.
• DB-based app config with auto-migration on startup; use_mode stored
  in app_config.

Fixed

• Streaming SSE responses fail when routed through the Next.js dev
  proxy — direct connection to the backend is now used for SSE.
• qwen3-rerank connection failure caused by incorrect URL routing;
  fixed by using the native endpoint
  (/api/v1/services/rerank/text-rerank/text-rerank) for DashScope,
  while gte / qwen3-vl-rerank use the compatible endpoint.
• GitHub Actions CI/CD for Docker image builds fails when building
  the frontend for arm64 — restricted to linux/amd64.
• Next.js 16 requires Node.js 22; older Node versions caused frontend
  build failures.
• SMTP connection unexpectedly closing due to incorrect SSL/TLS
  configuration — proper port (465 for SSL, 587 for STARTTLS) and
  option selection.
• Goal detail page undefined 'dashboard.title' due to missing API
  fields — added goal_title/goal_scenario/goal_target_date/
  goal_status to the dashboard API response.
• Dropdown menu in the expanded sidebar was unclickable: the parent
  <aside> backdrop-blur-sm created a stacking context that scoped
  the menu's z-index. Fixed via React Portal to document.body.
• Conversation page attachment upload returned 500: ingestUpload
  used a raw fetch without the auth token. Refactored to use the
  shared request helper (auto-attaches Authorization: Bearer and
  supports 401 refresh-and-retry).
• Duplicate brand row in the PWA sidebar drawer — consolidated into
  a single SidebarContent brand row with optional close button.

Changed

• README split into per-language files (zh-CN, zh-TW, en, es, de, fr).
• Chat history sidebar toggle button uses a history icon instead of
  the previous chat icon; chat history entries no longer display chat
  icons.
• Information entry page sliders adapted for light theme.
• PWA mode no longer renders a mobile top bar — the sidebar toggle
  lives in each page's heading instead.
• ThemeSliderRow in the user menu no longer closes the dropdown on
  click (user can preview multiple themes).
• Logout now surfaces a native LifeTree ConfirmDialog instead of
  logging out immediately.
• /notifications page: removed the "实时连接已就绪" pulse indicator;
  unread count badge retained.
• Use mode configured via LIFETREE_USE_MODE env var (default
  single), stored in app_config.use_mode.
• Minibar dropdown menu positioning: bottom edge at avatar's top edge
  with 4px gap, clamping to top viewport edge (minimum 8px margin) if
  overflow occurs; auto-closes on outside click.
• All browser native dialogs/popups replaced with LifeTree's existing
  dialog/popup components.
• Toast notifications allow text selection and copying.