v1.3.0

feat(mobile): complete Android app redesign - v1.3.0

Complete rewrite of mobile UI to match desktop feature parity:

Shared Components:
- MessageRenderer: unified message rendering (thinking, code, images, files)
- CodeBlock: syntax highlighting + copy button
- ThinkingBlock: collapsible thinking panel (deepseek-style)
- ImageLightbox: full-screen image preview

Mobile Views (3634 lines total, up from 641):
- MobileChatView: markdown, code highlighting, thinking blocks, multi-image
  upload with compression, file attachments, clipboard paste, token usage,
  message actions (copy/regenerate/delete/branch), skill picker, provider/model
  selector, conversation list (search/pin/delete)
- MobileSettingsView: full provider config (API keys, URLs, MiMo web search,
  DeepSeek reasoning effort, Qwen thinking), TTS provider config, model
  discovery, connection test, token stats, changelog
- MobileSkillsView: search, category filter, GitHub install, local import,
  star refresh
- MobileMemoryView: L1-L4 stats, layer filter, search, add/delete/batch
  delete, consolidation, export/import
- MobileAgentsView: create/delete agents, per-agent model/TTS config
- MobileCodeGenView: 6-phase pipeline, quick templates, streaming
- MobileSetupWizard: first-run provider setup
- MobileNav: 5 tabs + 'More' drawer (agents, codegen, settings)
- MobileApp: first-run detection, parallel data loading, loading screen

Version bump: 1.2.1 -> 1.3.0