feat: complete Phase 1 foundation hardening + three-mode UI design doc

Phase 1a — Gradient Removal:
- Replaced all gradient-button/gradient-card with glass-button/path-option-card
- Removed banned gradient CSS classes

Phase 1b — Security Hardening:
- SecretsManager: AES-256-GCM encryption (core/security)
- electrs_status: credentials from env vars instead of hardcoded
- port_manager: RwLock proper error handling (no unwrap)
- Pinned all 11 :latest manifest images to specific versions
- parmanode converter: pinned inferred image versions

Phase 1c — Code Quality:
- Split rpc.rs (1795 lines) into 6 handler modules (auth, node, container, package, peers)
- Removed sideload code (UI, store, RPC client, 3 doc files)
- Fixed body background flash on logout/refresh
- Replaced 30 TypeScript `any` types with proper types
- Deleted HelloWorld.vue, removed TODO comments
- Added set -euo pipefail to all shell scripts
- Made deploy script verbose with timestamps and elapsed time

Also adds:
- CLAUDE.md project guide
- docs/three-mode-ui-design.md — design spec for Easy/Pro/Chat UI modes
- OnlineStatusPill component

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

neode-ui/src/stores/app.ts

@@ -90,7 +90,7 @@ export const useAppStore = defineStore('app', () => {
           }
         })
         
-        wsClient.subscribe((update: any) => {
+        wsClient.subscribe((update: { type?: string; data?: DataModel; rev?: number; patch?: import('@/types/api').PatchOperation[] }) => {
         // Handle mock backend format: {type: 'initial', data: {...}}
         if (update?.type === 'initial' && update?.data) {
           console.log('[Store] Received initial data from mock backend')
@@ -256,19 +256,15 @@ export const useAppStore = defineStore('app', () => {
     return rpcClient.shutdownServer()
   }
 
-  async function getMetrics(): Promise<any> {
+  async function getMetrics(): Promise<Record<string, unknown>> {
     return rpcClient.getMetrics()
   }
 
   // Marketplace actions
-  async function getMarketplace(url: string): Promise<any> {
+  async function getMarketplace(url: string): Promise<Record<string, unknown>> {
     return rpcClient.getMarketplace(url)
   }
 
-  async function sideloadPackage(manifest: any, icon: string): Promise<string> {
-    return rpcClient.sideloadPackage(manifest, icon)
-  }
-
   return {
     // State
     data,
@@ -303,7 +299,6 @@ export const useAppStore = defineStore('app', () => {
     shutdownServer,
     getMetrics,
     getMarketplace,
-    sideloadPackage,
   }
 })