refactor: split monolithic main.py into services/ + ui/ modules (improve-maintainability)

- main.py: 4360 → 146 lines (96.6% reduction), entry layer only
- services/: rate_limiter, autostart, persona, connection, profile,
  hotspot, content, engagement, scheduler, queue_ops (10 business modules)
- ui/app.py: all Gradio UI code extracted into build_app(cfg, analytics)
- Fix: with gr.Blocks() indented inside build_app function
- Fix: cfg.all property (not get_all method)
- Fix: STATUS_LABELS, get_persona_keywords, fetch_proactive_notes imports
- Fix: queue_ops module-level set_publish_callback moved into configure()
- Fix: pub_queue.format_*() wrapped as queue_format_table/calendar helpers
- All 14 files syntax-verified, build_app() runtime-verified
- 58/58 tasks complete"

openspec/changes/improve-maintainability/specs/services-profile/spec.md

@@ -0,0 +1,12 @@
+## ADDED Requirements
+
+### Requirement: 用户主页解析函数迁移至独立模块
+系统 SHALL 将用户主页数据获取与解析相关函数从 `main.py` 提取至 `services/profile.py`，包括：`_parse_profile_json`、`_parse_count`、`fetch_my_profile`。
+
+#### Scenario: 模块导入成功
+- **WHEN** `main.py` 执行 `from services.profile import fetch_my_profile`
+- **THEN** 函数可正常调用，行为与迁移前一致
+
+#### Scenario: 解析容错性保留
+- **WHEN** `_parse_count` 接收到格式异常的数值字符串（如 "1.2万"、"--"）
+- **THEN** SHALL 返回与迁移前相同的浮点数或 0，不抛出异常