Browser H5 startup now binds the in-memory bearer token only when the selected server URL is non-loopback, so stored remote credentials cannot follow a later localhost, 127.0.0.1, or IPv6 loopback startup. Token verification errors also use the structured HTTP status when available instead of relying only on message text.
Constraint: Browser H5 may reuse localStorage across remote and local server URLs.
Rejected: Clear all remembered H5 connection state on every loopback startup | preserving the remote URL is useful for the next remote retry and the token alone is the leak risk.
Confidence: high
Scope-risk: narrow
Directive: Keep browser auth token assignment gated by requiresH5AuthForServerUrl before adding new bootstrap paths.
Tested: cd desktop && bunx vitest run src/api/client.test.ts src/api/websocket.test.ts src/lib/desktopRuntime.test.ts src/components/layout/AppShell.test.tsx
Remote browser bootstrap now keeps reverse-proxy path prefixes, recognizes IPv6 loopback as local, and converts remote health or verify failures into recoverable H5 connection prompts instead of falling back to the generic startup error surface. Token invalidation clears only the stored token so users can retry without re-entering the server address.
Constraint: Review fixes must stay inside the existing Task 4 browser-runtime scope without changing the Tauri localhost startup path
Rejected: Clear both stored server URL and token on remote bootstrap failures | it forces unnecessary re-entry after stale credentials
Directive: Any future browser-mode startup error for non-loopback backends should remain recoverable through H5ConnectionView unless the desktop/Tauri contract changes
Confidence: high
Scope-risk: narrow
Tested: cd desktop && bunx vitest run src/api/client.test.ts src/api/websocket.test.ts src/lib/desktopRuntime.test.ts src/components/layout/AppShell.test.tsx
Tested: cd desktop && bun run lint
Tested: git diff --check -- desktop/src/api/client.ts desktop/src/api/websocket.ts desktop/src/lib/desktopRuntime.ts desktop/src/components/layout/H5ConnectionView.tsx desktop/src/components/layout/AppShell.tsx desktop/src/api/client.test.ts desktop/src/api/websocket.test.ts desktop/src/lib/desktopRuntime.test.ts desktop/src/components/layout/AppShell.test.tsx
Not-tested: Live reverse-proxy browser session against a real remote H5 server
