Overhaul: real metrics, Git integration UI, open-source hygiene, root cleanup

Backend:
- GET /services/:id/metrics with real Docker container stats
- DELETE /git/providers/:id and GET repo branches endpoint

Frontend:
- Service detail shows real telemetry or honest empty states
- Live status distinguishes idle/polling/reconnecting
- Git providers section in Settings; repo+branch pickers in Add Service
- Real logo, compact Projects header, canvas fitView fix
- index.css deduplicated (1725 -> 1384 lines)
- Fixed smoke tests, lint errors, ToastProvider/context unification

Repo hygiene:
- Added LICENSE (MIT), CONTRIBUTING.md, SECURITY.md; rewrote README
- Untracked .env.prod and data/letsencrypt secrets; fixed .gitignore
- Removed legacy root src/internal/cmd and stale configs/docs/artifacts
- Moved guides and design references under docs/

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/frontend/src/shared/components/EnhancedMetricCard.tsx

@@ -184,7 +184,6 @@ export function CacheMetricCard({
 }: CacheMetricCardProps) {
   const cachePercent = Math.round((cacheMB / totalMB) * 100);
   const nonCachePercent = Math.round((nonCacheMB / totalMB) * 100);
-  const freePercent = 100 - cachePercent - nonCachePercent;
 
   return (
     <div
@@ -316,7 +315,6 @@ export function PerformanceMetricCard({
   percentage,
   upSpeed,
   downSpeed,
-  datasets,
   onClick,
   animationDelay = 0,
 }: PerformanceMetricCardProps) {

app/frontend/src/shared/components/ErrorBoundary.tsx

@@ -1,4 +1,5 @@
-import { Component, ErrorInfo, ReactNode } from 'react';
+import { Component } from 'react';
+import type { ErrorInfo, ReactNode } from 'react';
 
 interface Props {
   children: ReactNode;

app/frontend/src/shared/components/Toast.tsx

@@ -1,8 +1,8 @@
 import * as ToastPrimitive from '@radix-ui/react-toast';
-import { createContext, useContext, useState, ReactNode } from 'react';
+import { useState } from 'react';
+import type { ReactNode } from 'react';
 import { IconX, IconCheck, IconAlertCircle, IconInfoCircle } from '@tabler/icons-react';
-
-type ToastType = 'success' | 'error' | 'info' | 'warning';
+import { ToastContext, type ToastType } from '../hooks/use-toast';
 
 interface Toast {
   id: string;
@@ -11,20 +11,6 @@ interface Toast {
   description?: string;
 }
 
-interface ToastContextValue {
-  showToast: (type: ToastType, title: string, description?: string) => void;
-}
-
-const ToastContext = createContext<ToastContextValue | undefined>(undefined);
-
-export function useToast() {
-  const context = useContext(ToastContext);
-  if (!context) {
-    throw new Error('useToast must be used within ToastProvider');
-  }
-  return context;
-}
-
 interface ToastProviderProps {
   children: ReactNode;
 }
@@ -32,7 +18,11 @@ interface ToastProviderProps {
 export function ToastProvider({ children }: ToastProviderProps) {
   const [toasts, setToasts] = useState<Toast[]>([]);
 
-  const showToast = (type: ToastType, title: string, description?: string) => {
+  const showToast = (first: ToastType | string, second: ToastType | string, description?: string) => {
+    const toastTypes: ToastType[] = ['success', 'error', 'info', 'warning'];
+    const firstIsType = toastTypes.includes(first as ToastType);
+    const type = (firstIsType ? first : second) as ToastType;
+    const title = (firstIsType ? second : first) as string;
     const id = Math.random().toString(36).substring(7);
     setToasts((prev) => [...prev, { id, type, title, description }]);
 

app/frontend/src/shared/components/index.ts

@@ -6,3 +6,5 @@ export * from './DonutChart';
 export * from './EnhancedMetricCard';
 export * from './CommandPalette';
 export * from './StatusBadge';
+export { useToast } from '../hooks/use-toast';
+export type { ToastType, ToastContextValue } from '../hooks/use-toast';