init: CryptoCoin desktop ticker

Co-authored-by: Cursor <cursoragent@cursor.com>

src-tauri/capabilities/default.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "../gen/schemas/desktop-schema.json",
+  "identifier": "default",
+  "description": "Capability for the main window",
+  "windows": ["main"],
+  "permissions": [
+    "core:default",
+    "core:window:allow-start-dragging",
+    "core:window:allow-show",
+    "core:window:allow-hide",
+    "core:window:allow-set-focus",
+    "core:window:allow-set-size",
+    "core:window:allow-close",
+    "allow-fetch-tickers",
+    "allow-coin-settings",
+    "allow-api-settings"
+  ]
+}