feat: initial Peekache implementation

.gitignore

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+# Dependencies
+node_modules/
+
+# Build outputs
+dist/
+dist-ssr/
+build/
+
+# Tauri build artifacts
+src-tauri/target/
+src-tauri/gen/
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# Editor directories
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# TypeScript build info
+*.tsbuildinfo

CLAUDE.md

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+# Fossick
+
+Tauri v2 desktop app for browsing, previewing, and managing cached media from Discord and other data sources.
+
+## Quick Start
+
+```bash
+npm run tauri dev
+```
+
+## Tech Stack
+
+- **Backend:** Rust (src-tauri/)
+- **Frontend:** React 19 + TypeScript + Tailwind CSS v4 (src/)
+- **Database:** SQLite via sqlx
+- **Desktop:** Tauri v2 with plugins (dialog, clipboard-manager, shell)
+- **Thumbnails:** `image` crate for images, `ffmpeg` for video frames
+
+## Project Structure
+
+```
+src-tauri/src/       — Rust backend
+  lib.rs             — app setup, module declarations
+  commands.rs        — Tauri #[command] handlers
+  cache.rs           — CacheEngine (scan, thumbnails, file ops)
+  db.rs              — SQLite queries
+  error.rs           — Error types
+  settings.rs        — AppSettings JSON persistence
+  providers.rs       — DataSource trait, registry
+  providers/         — Discord, Custom providers
+
+src/                 — React frontend
+  lib/tauri.ts       — typed invoke wrappers
+  hooks/             — useCache, useTheme, useInfiniteScroll
+  components/        — Gallery, Preview, Settings, Sidebar, etc.
+  providers/         — frontend provider metadata
+```
+
+## Commands
+
+```bash
+# Development
+npm run tauri dev
+
+# Build
+npm run tauri build
+
+# Rust tests
+cd src-tauri && cargo test
+
+# TypeScript check
+npx tsc --noEmit
+
+# Rust lint
+cd src-tauri && cargo clippy
+```
+
+## Code Style
+
+Follow `RUST_STYLE_GUIDE.md` for all Rust code. Key rules:
+- No `mod.rs` files — use `providers.rs` as module root
+- `//!` doc comment at top of every Rust file
+- Import order: crate-local, external, std (separated by blank lines)
+- `thiserror` for error enums, `anyhow` for application-level errors
+- `Arc<str>` for immutable string IDs
+- `tracing` for logging (never `println!` or `dbg!`)
+- No `.unwrap()` in production code
+
+## Architecture
+
+- **Providers** implement the `DataSource` trait — each owns its extraction logic
+- **CacheEngine** orchestrates scanning across providers, stores entries in SQLite, generates thumbnails
+- **Tauri commands** are thin wrappers delegating to CacheEngine and db module
+- **Frontend** calls commands via typed `api` object in `lib/tauri.ts`
+- **Settings** persisted as JSON in Tauri's app data directory
+- **Entries** persisted in SQLite for instant gallery load on app launch

README.md

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+# Fossick
+
+Desktop app for browsing, previewing, and managing cached media from Discord and other data sources. Built with Tauri v2, React, and Rust.
+
+## Development
+
+```bash
+npm install
+npm run tauri dev
+```
+
+## Build
+
+```bash
+npm run tauri build
+```