chore: bump version to 0.3.4

fix: flush buffered content for short answers + reduce buffer to 30 c…

…hars

- Short answers (<200 chars) were never flushed — whole response as 1 token
- Now flush buffered_content at stream end when no tool calls detected
- Reduce BUFFER_THRESHOLD 200→30: models decide tool calls in first few tokens
- Verified: 3-85 tokens with <0.2s gaps = real streaming

refine: remove message author labels + compact mobile header

- Remove 'AI 助手' / '你' labels from chat bubbles
- Hide .kbchat-message-author via CSS
- Compact header on mobile:
  - 760px: row layout, min-height 40px, hide subtitle
  - 640px: min-height 36px, smaller badge
  - 480px: min-height 34px, extra compact buttons

v0.3.1: emoji清理 + 任务管理 + SSE实时监控 + 代理持久化修复

- 全量替换项目emoji为SVG图标(icons.js 45个图标)/文本标签
- 摄入任务分页管理 + 级联删除 + 清除已完成
- SSE实时推送摄入状态替代轮询(30s fallback)
- LLM响应流式透传到任务卡片
- 展开式任务日志(渐变折叠+展开)
- 修复HTTP代理清空后刷新复活的6连环bug
- Wiki生成器接入EventStream v2
- 设置面板保存按钮生效

fix: route /s/{slug} to kb-chat.html for scenario page navigation

StaticFiles html=True only falls back to index.html, but scenario
pages need kb-chat.html which contains the scenario-specific JS
(kb-chat.js) that extracts the slug from /s/{slug} path.

v0.2.2: UI fixes + delete + Qdrant tolerance

v0.2.1: Scenario management + bug fixes

v0.2.0 — Cookie Auth + Wiki + Embeddings