feat: complete Phase 3 scaffolding (templates, static, Docker, per-app skeletons)

- Per-app skeleton completion: property/client/setting now have services/,
  tasks.py, views.py, urls.py, serializers.py, templates/<app>/, tests/
- admin.py added to all 10 apps (per spec §2.108 / §17.3)
- Top-level templates/: base.html, layouts/{app,auth}.html, components/
  {topbar,sidebar,pagination,toast,modal,empty-state}.html, errors/
  {403,404,500}.html
- static/: css/main.css (Tailwind entry), js/main.js (HTMX toast +
  CSRF wiring per §7.4), vendor/.gitkeep
- tailwind.config.js: Primary teal + neutral slate + semantic colors,
  Inter font stack, z-60/z-70, shadow-xs, slide-in-right animation per
  UI_SYSTEM §2.7/§10.1
- package.json: tailwindcss-only build/watch
- Dockerfile + docker-compose.yml (6 services: web/db/redis/celery/
  celery-beat/tailwind) + docker-compose.prod.yml + Makefile
- tests/ root: conftest.py with TenantClient fixture per §720,
  integration/{property,client,release}/, e2e/, schemathesis skeleton
- Removed empty apps/tenant/models/ (tenant uses models.py per §17.1)

Validated: manage.py check passes; tree matches spec §2 exactly.

tailwind.config.js

@@ -0,0 +1,61 @@
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+    content: [
+        "./templates/**/*.html",
+        "./apps/**/templates/**/*.html",
+        "./static/js/**/*.js",
+    ],
+    theme: {
+        extend: {
+            colors: {
+                primary: {
+                    50: "#F0FDFA",
+                    100: "#CCFBF1",
+                    200: "#99F6E4",
+                    300: "#5EEAD4",
+                    400: "#2DD4BF",
+                    500: "#14B8A6",
+                    600: "#0F766E",
+                    700: "#115E59",
+                    800: "#134E4A",
+                },
+                neutral: {
+                    50: "#F8FAFC",
+                    100: "#F1F5F9",
+                    200: "#E2E8F0",
+                    300: "#CBD5E1",
+                    400: "#94A3B8",
+                    500: "#64748B",
+                    600: "#475569",
+                    700: "#334155",
+                    800: "#1E293B",
+                    900: "#0F172A",
+                },
+                success: { 600: "#16A34A" },
+                warning: { 600: "#D97706" },
+                danger: { 600: "#DC2626" },
+                info: { 600: "#2563EB" },
+            },
+            fontFamily: {
+                sans: ["Inter", "PingFang SC", "Microsoft YaHei", "sans-serif"],
+            },
+            zIndex: {
+                60: "60",
+                70: "70",
+            },
+            boxShadow: {
+                xs: "0 1px 2px 0 rgb(0 0 0 / 0.05)",
+            },
+            keyframes: {
+                "slide-in-right": {
+                    "0%": { transform: "translateX(100%)", opacity: "0" },
+                    "100%": { transform: "translateX(0)", opacity: "1" },
+                },
+            },
+            animation: {
+                "slide-in-right": "slide-in-right 0.2s ease-out",
+            },
+        },
+    },
+    plugins: [],
+};