feat(docker-watcher): phase 2 - crypto & config seed loader

AES-256-GCM encryption for credential storage, YAML seed config
parser with validation, and transactional import into SQLite.
Credentials (registry tokens, NPM password) encrypted before storage.

plans/docker-watcher-core/phase-13-ui-polish.md

@@ -0,0 +1,59 @@
+# Phase 13: Frontend Polish & Modern UI
+
+**Status:** ⬜ Not Started
+**Parent plan:** [PLAN.md](./PLAN.md)
+**Domain:** frontend
+
+## Objective
+Enhance the web UI with a modern, polished look and feel — custom SVG icons, refined typography, consistent color palette, smooth transitions, and overall professional frontend quality.
+
+## Tasks
+
+- [ ] Task 1: Design system foundations — define color palette (dark/light), spacing scale, typography scale, border radius tokens as CSS custom properties
+- [ ] Task 2: SVG icon set — create or integrate a consistent icon library (Lucide, Heroicons, or custom SVGs) for all UI actions (deploy, stop, start, restart, remove, settings, registry, etc.)
+- [ ] Task 3: Refine layout — polished sidebar/topnav with active state indicators, smooth transitions, responsive breakpoints
+- [ ] Task 4: Dashboard cards — redesign project cards with status indicators, instance count badges, sparkline activity, hover effects
+- [ ] Task 5: Project detail view — clean table/card layout for instances, inline status badges with pulse animation for "running", deploy history timeline
+- [ ] Task 6: Form styling — consistent input fields, select dropdowns, toggle switches (replace checkboxes), button hierarchy (primary/secondary/danger)
+- [ ] Task 7: Toast/notification system — slide-in toasts with icons, auto-dismiss, stacking
+- [ ] Task 8: Loading states — skeleton loaders for data fetching, spinner for actions, progress indicator for deploys
+- [ ] Task 9: Empty states — illustrated empty states with call-to-action for "no projects", "no instances", "no deploys"
+- [ ] Task 10: Responsive design — mobile-friendly layout, collapsible sidebar, touch-friendly controls
+- [ ] Task 11: Micro-interactions — button press feedback, status transition animations, deploy progress animation
+- [ ] Task 12: Dark mode support (optional) — toggle in settings, respect system preference
+- [ ] Task 13: Localization (EN/RU) — i18n setup with locale switcher, translate all UI strings to English and Russian, persist language preference
+
+## Files to Modify/Create
+- `web/src/lib/styles/` — design tokens, global styles
+- `web/src/lib/components/icons/` — SVG icon components
+- `web/src/lib/components/` — enhanced existing components
+- `web/src/lib/i18n/` — locale files (en.json, ru.json), i18n helper, locale switcher component
+- All route files — refined layouts and styling, replace hardcoded strings with i18n keys
+
+## Acceptance Criteria
+- UI looks modern and professional — not "default framework" appearance
+- Consistent icon language throughout the app
+- Smooth transitions and meaningful animations (not gratuitous)
+- Responsive down to mobile viewport
+- Loading and empty states provide good UX
+- Color palette works well in both light and dark contexts
+- All UI strings available in English and Russian, switchable via locale picker
+
+## Notes
+- This phase runs AFTER all functionality is complete — pure visual/UX enhancement
+- Do not change any functionality or API contracts
+- Prefer CSS custom properties for theming over hardcoded values
+- Keep bundle size reasonable — inline SVGs preferred over icon font libraries
+- Animations should be tasteful and serve UX, not decoration
+- For i18n, use a lightweight approach (JSON locale files + Svelte store) — no heavy i18n framework needed
+- Default language: English. Russian as secondary. Locale persisted to localStorage
+
+## Review Checklist
+- [ ] All tasks completed
+- [ ] Visual consistency across all pages
+- [ ] No functionality regressions
+- [ ] Responsive on mobile/tablet/desktop
+- [ ] Accessible (proper contrast ratios, focus states, aria labels on icons)
+
+## Handoff to Next Phase
+<!-- This is the final UI phase — no handoff needed. -->