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/api/rpc-client.ts

@@ -2,7 +2,7 @@
 
 export interface RPCOptions {
   method: string
-  params?: any
+  params?: Record<string, unknown>
   timeout?: number
 }
 
@@ -11,7 +11,7 @@ export interface RPCResponse<T> {
   error?: {
     code: number
     message: string
-    data?: any
+    data?: unknown
   }
 }
 
@@ -271,7 +271,7 @@ class RPCClient {
     })
   }
 
-  async getMetrics(): Promise<any> {
+  async getMetrics(): Promise<Record<string, unknown>> {
     return this.call({
       method: 'server.metrics',
       params: {},
@@ -334,20 +334,13 @@ class RPCClient {
     })
   }
 
-  async getMarketplace(url: string): Promise<any> {
+  async getMarketplace(url: string): Promise<Record<string, unknown>> {
     return this.call({
       method: 'marketplace.get',
       params: { url },
     })
   }
 
-  async sideloadPackage(manifest: any, icon: string): Promise<string> {
-    return this.call({
-      method: 'package.sideload',
-      params: { manifest, icon },
-      timeout: 120000, // 2 minutes for upload
-    })
-  }
 }
 
 export const rpcClient = new RPCClient()