Multi-Provider AI Unification & UX Overhaul - #39
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Add two major feature areas on top of the MuPDF Android viewer base. ### E-ink Screen Optimizations - Add `setAnimationsEnabled(bool)` to ReaderView: when disabled, scroll duration drops from 400 ms to 1 ms and drag scrolling is suppressed, eliminating ghosting on e-ink panels. - Add `setEinkRefreshEnabled(bool)` to ReaderView: posts an invalidate() after each page settlement to trigger a full-screen refresh cycle. - Fling gestures now jump directly to the next/previous page instead of smooth-scrolling when animations are off. - Add a Settings button (wrench icon) to the top bar with a popup menu for toggling animations, e-ink refresh, and setting the OpenAI API key. All settings are persisted via SharedPreferences. ### AI-Assisted Reading - Add AiDocumentActivity (extends DocumentActivity) that overlays a Jetpack Compose UI onto the existing PDF reader without replacing it. - Add IonizationOverlay: a full-screen Canvas gesture layer that detects free-form draw gestures and fires a vibration + AI request on release. - Add OpenAiClient: streams chat completions from the OpenAI API over SSE using OkHttp. The system prompt produces two structured sections — an AI Explanation and an Atomic Note (core concept / key insight / connections). - Add AiPanel: a bottom sheet built in Compose that slides up and renders the streaming response token-by-token in real time. - Expose MuPDFCore.getPageText() to extract structured text from the current page via MuPDF's StructuredText API for use as AI context. - Add SecurePreferences: stores the OpenAI API key in EncryptedSharedPreferences (AES256-GCM) so the key is never stored in plain text. - Add ObsidianExporter: saves AI responses as Markdown files under Documents/ObsidianVault/Atoms/ with #atom #atomread tags for integration with Obsidian. - Add AtomReadActivity registered as an alternate PDF intent handler (application/pdf MIME), combining the PDF viewer with the AI overlay. - Add BondingView: prototype Compose component for visually linking atomic notes via drag-and-drop collision (not yet wired to main flow).
…ocument viewing ，DeepSeek V3/R1 和 GPT 4.1/5.4 Mini 支持
## Body
- **Multi-Key Secure Storage**: Refactored `SecurePreferences` to support 5 independent API key slots (OpenAI, DeepSeek, Qwen, Anthropic, Gemini) with smart auto-routing based on model/URL.
- **Enhanced AI Settings**: Redesigned the settings dialog with a secure multi-input layout and 12 "Quick Presets" for instant configuration of top-tier models (GPT-4o, Claude 3.5, Gemini 2.0, DeepSeek R1, etc.).
- **Unified AiClient**:
- Native support for Anthropic Messages API (Claude).
- Robust streaming parser for OpenAI-compatible providers.
- Improved stability with 60s timeouts and null-chunk filtering (fixed "nullnullnull" output).
- **UX Polishing**:
- Automatic exit from AI mode upon closing the assistant panel to restore page-turning.
- Context-aware error messages identifying which specific API key is missing.
- Removed redundant reasoning/thinking blocks for a cleaner user experience.
## Footer
Co-authored-by: Antigravity <antigravity@google.com>
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Description
This PR unifies the AI integration architecture, enabling seamless switching between major AI providers without credential re-entry. It also polishes the AI Assistant's interactive flow for a more "frictionless" reading experience.
Key Changes
1. Smart Credential Management
2. Redesigned AI Settings Dialog
3. Core Engine Upgrades (
AiClient)4. Interaction Flow (心流优化)
Testing Performed