chore: remove all NestJS backend references, replace with Hono/Bun

- Delete nestjs-backend.md guideline (replaced by hono-server.md)
- Delete Dockerfile.nestjs-base and Dockerfile.nestjs templates
- Delete stale BACKEND_ARCHITECTURE.md doc (NestJS-era, obsolete)
- Update CLAUDE.md, GUIDELINES.md, authentication.md to Hono/Bun first
- Update all app CLAUDE.md files: backend/ → server/, NestJS → Hono+Bun
- Update all app package.json files: @*/backend → @*/server
- Update docs: LOCAL_DEVELOPMENT, PORT_SCHEMA, ENVIRONMENT_VARIABLES,
  DATABASE_MIGRATIONS, MAC_MINI_SERVER, PROJECT_OVERVIEW
- Update scripts: generate-env.mjs, setup-databases.sh, build-app.sh
- Update CI/CD: cd-macmini.yml backend → server paths
- Update Astro docs site: @chat/backend → @chat/server

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker/Dockerfile.nestjs-base

@@ -1,58 +0,0 @@
-# syntax=docker/dockerfile:1
-# Shared builder base for all NestJS backends
-# Contains pre-built shared packages and dependencies
-#
-# Usage in backend Dockerfiles:
-#   FROM nestjs-base:local AS builder
-#   COPY apps/myapp/apps/backend ./apps/myapp/apps/backend
-#   RUN --mount=type=cache,id=pnpm,target=/root/.local/share/pnpm/store pnpm install --frozen-lockfile --ignore-scripts
-#   WORKDIR /app/apps/myapp/apps/backend
-#   RUN pnpm build
-
-FROM node:20-alpine
-
-# Install pnpm
-RUN corepack enable && corepack prepare pnpm@9.15.0 --activate
-
-WORKDIR /app
-
-# Copy root workspace files
-COPY pnpm-workspace.yaml ./
-COPY package.json ./
-COPY pnpm-lock.yaml ./
-COPY patches ./patches
-
-# Copy ALL shared packages used by NestJS backends
-COPY packages/credit-operations ./packages/credit-operations
-COPY packages/mana-core-nestjs-integration ./packages/mana-core-nestjs-integration
-COPY packages/manadeck-database ./packages/manadeck-database
-COPY packages/shared-drizzle-config ./packages/shared-drizzle-config
-COPY packages/shared-errors ./packages/shared-errors
-COPY packages/shared-error-tracking ./packages/shared-error-tracking
-COPY packages/shared-nestjs-auth ./packages/shared-nestjs-auth
-COPY packages/shared-nestjs-health ./packages/shared-nestjs-health
-COPY packages/shared-nestjs-metrics ./packages/shared-nestjs-metrics
-COPY packages/shared-nestjs-setup ./packages/shared-nestjs-setup
-COPY packages/shared-llm ./packages/shared-llm
-COPY packages/shared-storage ./packages/shared-storage
-COPY packages/shared-tsconfig ./packages/shared-tsconfig
-
-# Install dependencies
-RUN --mount=type=cache,id=pnpm,target=/root/.local/share/pnpm/store \
-    pnpm install --frozen-lockfile --ignore-scripts
-
-# Build all shared packages (in dependency order)
-RUN cd packages/shared-errors && pnpm build \
-    && cd /app/packages/shared-nestjs-auth && pnpm build \
-    && cd /app/packages/shared-nestjs-health && pnpm build \
-    && cd /app/packages/shared-nestjs-metrics && pnpm build \
-    && cd /app/packages/shared-nestjs-setup && pnpm build \
-    && cd /app/packages/shared-error-tracking && pnpm build \
-    && cd /app/packages/shared-storage && pnpm build \
-    && cd /app/packages/shared-llm && pnpm build \
-    && cd /app/packages/shared-drizzle-config && pnpm build 2>/dev/null || true \
-    && cd /app/packages/credit-operations && pnpm build \
-    && cd /app/packages/mana-core-nestjs-integration && pnpm build \
-    && cd /app/packages/manadeck-database && pnpm build 2>/dev/null || true
-
-WORKDIR /app

docker/templates/Dockerfile.nestjs

@@ -1,89 +0,0 @@
-# syntax=docker/dockerfile:1
-# Multi-stage Dockerfile for NestJS backend services
-# This is a template - copy and customize for each backend service
-
-# ============================================
-# Build Stage
-# ============================================
-FROM node:20-alpine AS builder
-
-# Install pnpm
-RUN corepack enable && corepack prepare pnpm@9.15.0 --activate
-
-WORKDIR /app
-
-# Copy workspace files
-COPY pnpm-workspace.yaml ./
-COPY package.json ./
-COPY pnpm-lock.yaml ./
-
-# Copy all shared packages (adjust based on dependencies)
-COPY packages/ ./packages/
-
-# Copy the specific backend service
-# CUSTOMIZE THIS: Replace with your service path
-# Example: COPY apps/chat/apps/backend ./apps/chat/apps/backend
-ARG SERVICE_PATH
-COPY ${SERVICE_PATH} ./${SERVICE_PATH}
-
-# Install all dependencies (including devDependencies for build)
-RUN --mount=type=cache,id=pnpm,target=/root/.local/share/pnpm/store pnpm install --frozen-lockfile
-
-# Build shared packages first
-RUN pnpm run build:packages
-
-# Build the backend service
-WORKDIR /app/${SERVICE_PATH}
-RUN pnpm build
-
-# ============================================
-# Production Stage
-# ============================================
-FROM node:20-alpine AS production
-
-# Install pnpm and system dependencies
-RUN corepack enable && corepack prepare pnpm@9.15.0 --activate \
-    && apk add --no-cache \
-       postgresql-client \
-       curl \
-       wget
-
-WORKDIR /app
-
-# Copy workspace files
-COPY --from=builder /app/pnpm-workspace.yaml ./
-COPY --from=builder /app/package.json ./
-COPY --from=builder /app/pnpm-lock.yaml ./
-
-# Copy built packages and service
-COPY --from=builder /app/packages ./packages
-ARG SERVICE_PATH
-COPY --from=builder /app/${SERVICE_PATH} ./${SERVICE_PATH}
-
-# Install production dependencies only
-RUN --mount=type=cache,id=pnpm,target=/root/.local/share/pnpm/store pnpm install --prod --frozen-lockfile
-
-# Create non-root user
-RUN addgroup -g 1001 -S nodejs && \
-    adduser -S nestjs -u 1001
-
-# Change ownership
-RUN chown -R nestjs:nodejs /app
-
-# Switch to non-root user
-USER nestjs
-
-# Set working directory to service
-WORKDIR /app/${SERVICE_PATH}
-
-# Expose port (customize per service)
-ARG PORT=3000
-EXPOSE ${PORT}
-
-# Health check (customize endpoint per service)
-ARG HEALTH_PATH=/health
-HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
-  CMD wget --no-verbose --tries=1 --spider http://localhost:${PORT}${HEALTH_PATH} || exit 1
-
-# Start the application
-CMD ["node", "dist/main.js"]