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/components/CLIPopup.vue

@@ -31,7 +31,6 @@
               </svg>
               <span class="text-white font-medium">CLI Access</span>
             </div>
-            <AppSwitcher />
             <kbd class="hidden sm:inline-flex px-2 py-1 text-xs text-white/50 bg-white/10 rounded">Esc</kbd>
           </div>
 
@@ -101,7 +100,7 @@
                   From the terminal menu you can install to disk, configure Bitcoin, Lightning, view logs, and more.
                 </p>
                 <p class="text-white/40 text-xs">
-                  Tip: Press <kbd class="px-1.5 py-0.5 rounded bg-white/10 font-mono text-[10px]">C</kbd> or <kbd class="px-1.5 py-0.5 rounded bg-white/10 font-mono text-[10px]">⌘⇧`</kbd> to open this anytime.
+                  Tip: Press <kbd class="px-1.5 py-0.5 rounded bg-white/10 font-mono text-[10px]">⌘C</kbd> / <kbd class="px-1.5 py-0.5 rounded bg-white/10 font-mono text-[10px]">Ctrl+C</kbd> to open this anytime.
                 </p>
               </div>
             </div>
@@ -116,8 +115,6 @@
 import { ref, computed, watch, nextTick, onMounted, onBeforeUnmount } from 'vue'
 import { useCLIStore } from '@/stores/cli'
 import { useModalKeyboard } from '@/composables/useModalKeyboard'
-import AppSwitcher from '@/components/AppSwitcher.vue'
-
 const cliStore = useCLIStore()
 const panelRef = ref<HTMLElement | null>(null)
 const dragHandleRef = ref<HTMLElement | null>(null)