fix(runtime): eliminate hardcoded 20128 port remnants and make loopback URLs dynamic (#13533)

* fix(runtime): eliminate hardcoded 20128 port remnants and make loopback URLs dynamic

- Make model assessment probe base URL resolve dynamically from getRuntimePorts() / env
- Support dynamic loopback in traffic inspector replay route and MITM handlers
- Make WebSocket live server allowlist dynamically include runtime PORT/DASHBOARD_PORT loopback origins
- Update CLI tools config/apply/letta-settings and tool-detector to adapt to configured runtime port
- Update client UI components (EndpointPageClient, ApiExplorerClient, RelayProxyClient) to use current window origin or dynamic port
- Make resolveOmniRouteBaseUrl, useDisplayBaseUrl, and wellKnown.ts respect configured port
- Update package.json electron:dev wait-on to use ${PORT:-20128}
- Add test coverage for custom port in resolveOmniRouteBaseUrl and liveServerAllowList
- Add changelog fragment for PR #13533

* fix(runtime): complete the truncated fallback comment in wellKnown.ts

Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>

---------

Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>

package.json

@@ -122,7 +122,7 @@
     "lint:json": "node scripts/quality/run-eslint-json.mjs",
     "lint:md": "npx --yes markdownlint-cli2 \"docs/**/*.md\" \"*.md\" \"!docs/i18n\" \"!docs/research\"",
     "lint:prose": "vale docs",
-    "electron:dev": "concurrently \"npm run dev\" \"wait-on http://localhost:20128 && cd electron && npm run dev\"",
+    "electron:dev": "concurrently \"npm run dev\" \"wait-on http://localhost:${PORT:-20128} && cd electron && npm run dev\"",
     "electron:build": "npm run build && cd electron && npm run build",
     "electron:build:win": "npm run build && cd electron && npm run build:win",
     "electron:build:mac": "npm run build && cd electron && npm run build:mac",