feat(security,ui): self-host React deps, Tailwind, fonts; strict CSP; local QR; better selection state

Replace CDN React/ReactDOM/Babel with local libs; remove Babel and inline scripts
Build Tailwind locally, add safelist; switch to assets/tailwind.css
Self-host Font Awesome and Inter (CSS + woff2); remove external font CDNs
Implement strict CSP (no unsafe-inline/eval; scripts/styles/fonts from self)
Extract inline handlers; move PWA scripts to external files
Add local QR code generation (qrcode lib) and remove api.qrserver.com
Improve SessionTypeSelector visual selection (highlighted background and ring)
Keep PWA working with service worker and offline assets
Refs: CSP hardening, offline-first, no external dependencies

node_modules/yargs/locales/en.json

@@ -0,0 +1,51 @@
+{
+  "Commands:": "Commands:",
+  "Options:": "Options:",
+  "Examples:": "Examples:",
+  "boolean": "boolean",
+  "count": "count",
+  "string": "string",
+  "number": "number",
+  "array": "array",
+  "required": "required",
+  "default": "default",
+  "default:": "default:",
+  "choices:": "choices:",
+  "aliases:": "aliases:",
+  "generated-value": "generated-value",
+  "Not enough non-option arguments: got %s, need at least %s": {
+    "one": "Not enough non-option arguments: got %s, need at least %s",
+    "other": "Not enough non-option arguments: got %s, need at least %s"
+  },
+  "Too many non-option arguments: got %s, maximum of %s": {
+    "one": "Too many non-option arguments: got %s, maximum of %s",
+    "other": "Too many non-option arguments: got %s, maximum of %s"
+  },
+  "Missing argument value: %s": {
+    "one": "Missing argument value: %s",
+    "other": "Missing argument values: %s"
+  },
+  "Missing required argument: %s": {
+    "one": "Missing required argument: %s",
+    "other": "Missing required arguments: %s"
+  },
+  "Unknown argument: %s": {
+    "one": "Unknown argument: %s",
+    "other": "Unknown arguments: %s"
+  },
+  "Invalid values:": "Invalid values:",
+  "Argument: %s, Given: %s, Choices: %s": "Argument: %s, Given: %s, Choices: %s",
+  "Argument check failed: %s": "Argument check failed: %s",
+  "Implications failed:": "Missing dependent arguments:",
+  "Not enough arguments following: %s": "Not enough arguments following: %s",
+  "Invalid JSON config file: %s": "Invalid JSON config file: %s",
+  "Path to JSON config file": "Path to JSON config file",
+  "Show help": "Show help",
+  "Show version number": "Show version number",
+  "Did you mean %s?": "Did you mean %s?",
+  "Arguments %s and %s are mutually exclusive" : "Arguments %s and %s are mutually exclusive",
+  "Positionals:": "Positionals:",
+  "command": "command",
+  "deprecated": "deprecated",
+  "deprecated: %s": "deprecated: %s"
+}