feat: v0.5.0 - web dashboard, /deposits API, fix BTC error:null bug

- Add index.html web dashboard with dark/light theme
  - Real-time deposit ledger per address with tx_hash dedup
  - CAIP-2 chain badges, truncated hashes, Inter+JetBrainsMono fonts
  - Move-to-top animation on new deposits, modal add/delete UX
- Add /deposits API endpoint reading JSON Lines output file
- Add / route serving the dashboard HTML (zero CORS issues)
- Add output_path to ApiState for deposit file tracking
- Add Deserialize derive to DepositResult for JSON parsing
- Fix critical BTC bug: treat 'error: null' as success (JSON-RPC spec)
- Show error codes in RPC retry messages (-8, -32602, etc.)
- Add /deposits endpoint to README API docs
- Update output format docs with tx_hash field

Author: maxylev

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rustplorer"
-version = "0.4.0"
+version = "0.5.0"
 edition = "2021"
 description = "High-performance multi-chain deposit detector using public RPC endpoints"
 license = "MIT OR Apache-2.0"

README.md

@@ -236,19 +236,23 @@ rustplorer -a addresses.txt --watch --interval 30 --api-port 3000
 
 ## HTTP API
 
-Start an HTTP server to manage target addresses dynamically:
+Start an HTTP server to manage target addresses dynamically and visualize deposits:
 
 ```bash
-rustplorer -a addresses.txt --api-port 3000
+rustplorer -a addresses.txt --api-port 3000 -o deposits.jsonl
 ```
 
+Open `http://localhost:3000` in your browser for the real-time deposit dashboard with dark/light theme, address management, and live deposit ledger.
+
 ### Endpoints
 
 | Method | Path | Description |
 |--------|------|-------------|
+| `GET` | `/` | Web UI dashboard for managing addresses and viewing deposits |
 | `GET` | `/addresses` | List all tracked addresses |
 | `POST` | `/addresses` | Add a new address |
 | `DELETE` | `/addresses` | Remove an address |
+| `GET` | `/deposits` | List all detected deposits (JSON Lines from output file) |
 
 ### Examples
 
@@ -275,8 +279,13 @@ curl -X DELETE http://localhost:3000/addresses \
 curl -X DELETE http://localhost:3000/addresses \
   -H "Content-Type: application/json" \
   -d '{"addresses": ["0xAAA...", "0xBBB..."]}'
+
+# View detected deposits
+curl http://localhost:3000/deposits
 ```
 
+> **Note:** The `/deposits` endpoint and web dashboard require an output file (`-o deposits.jsonl`). The daemon writes each new deposit as a JSON Line, which the dashboard polls every 5 seconds.
+
 ## CLI Address Management
 
 Directly add or remove addresses from the command line. Flags can be repeated for batches: