- Add ProjectRole model with normalizeProjectRoles() persistence
- Extract ExpertPanelLead, RoleTeamPanel, RoleCollaborationFlow components
- Add roleIconPaths.tsx for SVG icon rendering by role type
- Add empty states for planner, wechat, geo, zhihu experts
- Revamp xiaohongshu empty state with CSS variable-driven theme system
- Add brand card and workspace logo styles for new expert types
- Wire isStreaming from sendPhase for role status indicators
- Fix geo regex from /geo/ to /\bgeo\b/ to avoid false matches
- Strengthen normalizeProjectRoles validation (non-empty strings, skillIds element check)
- Add prefers-reduced-motion overrides for title animations
- Remove unused --expert-arrow CSS variable
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Align sidebar-section-copy layout with Windows client (flex instead of grid)
to keep icon and text on the same line.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

- When clicking a session card, switch to the correct project and viewMode
  ('chat' for home sessions, 'experts' for expert sessions) instead of only
  setting the active session ID
- Persist session scope via sticky ref so switching to non-conversation tabs
  (knowledge, tasks, etc.) no longer jumps to the first expert's sessions
- Prevent project switch during active streaming to avoid disrupting AI output
- Keep useMemo pure by extracting ref writes into useEffect
- Remove redundant ternary in openSession
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

- Homepage: replace starter prompts with 5 digital-employee showcase cards
  (geo/xiaohongshu/douyin/planner/wechat) that navigate to expert projects
- Status chip: change "已就绪" to "运行中" with green dot, green text, green border
- switchExpert: set viewMode after switchProject completes (safer ordering)
- manifest.json: upgrade geo & wechat from home-chat-shortcut to standalone,
  add xhs & douyin standalone entries with full projectMatchKeywords
- Resolve expert key/visual key for planner, wechat, geo, zhihu
- Add ProjectRole shared type; enrich geo expert guide with 4 default roles
- CSS: remove conversation-workspace border/background/shadow, add overflow
  visible for card hover scale, match StatusChip positive tone to Windows client
- Fix /geo/ regex to word-boundary to avoid false substring matches
- Fix activeExpertGuide roles not falling back to guide defaults
- Fix expertMatchesCategory missing wechat/公众号 in isContent regex
- Fix resolveExpertKey planner regex missing 内容账号规划 keyword
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Increase border-radius values for all left sidebar navigation elements:
- Nav items, session cards, expert cards
- Sidebar sections and containers
- Category items and expert items
- New session button
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>