feat: add debug console for frontend and backend logs

Added a comprehensive debug console feature that captures and displays
logs from both the frontend and backend in a unified interface.

Frontend changes:
- Created DebugConsole component with real-time log display
- Added debugConsoleStore for state management and console capture
- Integrated console into main layout
- Added toggle button in StatusBar with console icon
- Implemented Ctrl+` keyboard shortcut to open/close console
- Features: log filtering by level, auto-scroll, timestamps, colour-coding

Backend changes:
- Added tracing and tracing-subscriber dependencies
- Created custom TauriLogLayer to emit Rust logs to frontend
- Integrated tracing subscriber in lib.rs setup
- Logs are forwarded via Tauri events (debug:log)

Key features:
- Circular buffer (max 1000 logs) prevents memory issues
- Frontend logs captured via console method overrides
- Backend logs forwarded from Rust tracing layer
- Log level filtering (debug, info, warn, error, all)
- Source badges distinguish frontend vs backend logs
- Colour-coded log levels for easy identification
- Auto-scroll toggle for inspecting older logs
- Clear logs button for resetting the console
- Beautiful dark-themed UI matching app aesthetic

Closes #126

src-tauri/Cargo.lock

@@ -1658,6 +1658,8 @@ dependencies = [
  "tauri-plugin-store",
  "tempfile",
  "tokio",
+ "tracing",
+ "tracing-subscriber",
  "uuid 1.19.0",
  "windows 0.62.2",
 ]
@@ -2245,6 +2247,15 @@ dependencies = [
  "syn 2.0.114",
 ]
 
+[[package]]
+name = "matchers"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d1525a2a28c7f4fa0fc98bb91ae755d1e2d1505079e05539e35bc876b5d65ae9"
+dependencies = [
+ "regex-automata",
+]
+
 [[package]]
 name = "matches"
 version = "0.1.10"
@@ -2401,6 +2412,15 @@ dependencies = [
  "zbus",
 ]
 
+[[package]]
+name = "nu-ansi-term"
+version = "0.50.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
+dependencies = [
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.1.0"
@@ -3879,6 +3899,15 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40ca3c46823713e0d4209592e8d6e826aa57e928f09752619fc696c499637f6"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "shared_child"
 version = "1.1.1"
@@ -4695,6 +4724,15 @@ dependencies = [
  "syn 2.0.114",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f60246a4944f24f6e018aa17cdeffb7818b76356965d03b07d6a9886e8962185"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "tiff"
 version = "0.10.3"
@@ -4986,6 +5024,36 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a"
 dependencies = [
  "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
+dependencies = [
+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f30143827ddab0d256fd843b7a66d164e9f271cfa0dde49142c5ca0ca291f1e"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex-automata",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
 ]
 
 [[package]]
@@ -5167,6 +5235,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "valuable"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
+
 [[package]]
 name = "version-compare"
 version = "0.2.1"