### Summary of Improvements
This PR replaces the custom `IntersectionObserver`-based virtualization
with the `virtua` library to significantly improve rendering performance
and UI responsiveness.
### 🚀 Performance Results
Verified using `session-performance.test.ts`:
- **Rendering**: 2000 messages rendered in **16.90ms**.
- **Huge Conversation**: 10,000 messages processed in **0.80ms**.
- **Session Switching**: Average switch time reduced to **0.58ms**
(virtually zero lag).
### 🛠️ Key Changes
- **Virtualized Message Stream**: Integrated `virtua/solid` for
efficient windowing and automatic scroll compensation.
- **Floating Scroll Controls**: Applied `position: absolute` and
`pointer-events: none` to the list controls to ensure
scroll-to-top/bottom buttons float correctly over the message area
without blocking interactions.
- **Package Synchronization**: Updated `virtua` and SDK dependencies,
with a fully synchronized `package-lock.json` for stable builds.
### 🎥 UI Verification
https://github.com/user-attachments/assets/24e483a3-8be6-4ac4-a431-d719f2015f4e
- **Smooth Scrolling**: Verified that rendering gaps are eliminated
during fast scrolls.
- **Position Retention**: Scroll positions are preserved when switching
between sessions.
> [!NOTE]
> Detailed performance gains and layout fixes are isolated to the
`virtua` implementation and core package updates, following the
requested cleanup.
---------
Co-authored-by: Shantur Rathore <i@shantur.com>
Upgrade @opencode-ai/sdk to 1.2.6 and prefer v2 model limit.input when present for the session AVAIL chip; otherwise keep the existing context-window-based estimate.
Use OpenCode v2 file APIs for browsing and Monaco DiffEditor for session snapshot diffs, with local baseline language metadata and optional CDN language loading.
Move PWA config into the default Vite build, ensure the PWA icon source is generated, and restrict Workbox caching to static assets only. Update server UI build wiring and clarify TLS requirements in docs.
- Add vite.config.pwa.ts extending the base config with VitePWA plugin
- Generate PWA icons at build time from source logo via @vite-pwa/assets-generator
- Add web app manifest with name, theme color, display overrides
- Add Workbox runtime caching: NetworkFirst for API, CacheFirst for assets
- Set navigateFallback to null to preserve server-side auth redirects
- Server build uses build:pwa for PWA-enabled output; Electron/Tauri use
the base build without PWA
Signed-off-by: Jesper Derehag <jderehag@hotmail.com>
