fix: RPC port and Linux dev wallet + setup guide

RELEASE-NOTES-v0.1.2.md

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+# Sentinel Node Manager v0.1.2
+
+**Released:** May 19, 2026
+
+v0.1.2 packages the full UI overhaul and infrastructure hardening work from v0.1.1 into a stable release build. Installers are available for Windows, macOS (Intel + Apple Silicon), and Linux (AppImage + .deb).
+
+---
+
+## What's New
+
+### On-Chain Hardware Specs Reporting
+Nodes now automatically broadcast a `specs:v1` self-MsgSend 12 seconds after a successful deploy. The memo carries a hardware snapshot (CPU, memory, vendor) recorded on-chain. Unsent broadcasts are retried on startup.
+
+### Live System Metrics
+A 1 Hz CPU and memory sampler runs in the background and feeds a new System screen. Metrics are broadcast over IPC and persist across navigation. Toggle defaults to on.
+
+### Activity Feed
+A grouped, filterable event log replaces the previous ad-hoc toast history. All deploy events, node status changes, and wallet activity are captured and searchable.
+
+### SSH Batch Deploy
+Batch deployments now accept CSV or JSON host input, run with a parallel-with-cap scheduler, support per-row credential overrides, and show per-row progress. Mnemonic reveal is gated behind explicit confirmation.
+
+### Security Hardening
+- Renderer sandbox enabled
+- Strict Content Security Policy (default-src 'self' in production builds)
+- Window-open and will-navigate guards (HTTPS and mailto only)
+- CLI auto-start gated behind explicit acknowledgment token
+- TOFU SSH host-key tracking
+- Secrets scrubbed from CLI broadcast events
+- Mnemonic redacted from deploy.status over CLI
+
+### RPC Pool Reliability
+The default RPC pool has been expanded to 12 verified endpoints synced with blue-js-sdk@2.7.1. The previously included rpc.sentinel.co was dropped after it was found to be ~22,000 blocks behind tip while reporting catching_up=false and returning zero balances for funded addresses.
+
+Active pool: Busurnode, Trinity Stake, PublicNode, Polkachu, MathNodes, Roomit, SuchNode, ChainTools, Validatus, QuokkaStake, Sentinel Growth DAO, ChainVibes.
+
+Settings now refresh the chain RPC pool every 60 seconds.
+
+### CLI Client Binary
+`bin/sentinel-node-manager.js` is a standalone CLI client supporting interactive shell mode, agent mode, and one-shot command execution. Colored output, Windows/macOS/Linux endpoint discovery.
+
+### Seed Phrase Modal
+Global seed phrase modal mounted at layout level — survives tab switches, includes 3-word verification confirmation, and never re-opens for the same job ID.
+
+### UI Refinements
+- NodeDetails rebuilt using canonical PanelLabel / PanelSection / KV / Mono primitives with compact 4-col grid and QR tile
+- Container log scroll clipping fixed
+- Operator balance stat card: accent gradient, wallet badge, aligned value/unit, withdraw button with disabled-state tooltip
+- Topbar back button removed, route-keyed page transitions added
+- Help screen redesigned with searchable left-rail nav, scroll-spy, grouped topics, and keyboard shortcut card
+- OnChainSpecs snapshot card: AMD vendor logo, Reserved/Total meters, condensed copy
+
+### Bug Fixes
+- Fixed stuck "Syncing" chip: `containerLogs()` now wrapped in try/catch to prevent Docker daemon issues from masking reachability checks
+- Node-online event now fires once on loading→online transition instead of every 4 seconds during the grace window
+- TypeScript: `sectionRefs` type widened to `HTMLElement` to match section ref types
+
+---
+
+## End-to-End CLI Test Harness
+`tests/e2e/cli-e2e.mjs` drives every CLI command including real self-send and MsgUpdateNodeDetails broadcasts, verified on-chain via RPC tx_search. Total spend is under 0.0015 DVPN. See `docs/e2e-cli-test.md` for full protocol.
+
+---
+
+## Downloads
+
+| Platform | File |
+|---|---|
+| Windows (installer) | `Sentinel-Node-Manager-Setup-0.1.2.exe` |
+| Windows (portable) | `Sentinel-Node-Manager-0.1.2.exe` |
+| macOS Intel | `Sentinel-Node-Manager-0.1.2.dmg` |
+| macOS Apple Silicon | `Sentinel-Node-Manager-0.1.2-arm64.dmg` |
+| Linux AppImage | `Sentinel-Node-Manager-0.1.2.AppImage` |
+| Linux .deb | `sentinel-node-manager_0.1.2_amd64.deb` |
+
+---
+
+## Requirements
+- Docker Desktop (Windows/macOS) or Docker Engine (Linux)
+- 2 GB free RAM minimum
+- UDP port reachable publicly (default 7777)