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>

apps/docs/src/content/docs/development/database-migrations.mdx

@@ -25,16 +25,16 @@ Each backend service has its own database and schema:
 
 ```bash
 # Push schema changes (development)
-pnpm --filter @chat/backend db:push
+pnpm --filter @chat/server db:push
 
 # Generate migration files
-pnpm --filter @chat/backend db:generate
+pnpm --filter @chat/server db:generate
 
 # Run migrations
-pnpm --filter @chat/backend db:migrate
+pnpm --filter @chat/server db:migrate
 
 # Open Drizzle Studio (database GUI)
-pnpm --filter @chat/backend db:studio
+pnpm --filter @chat/server db:studio
 ```
 
 ## Development Workflow
@@ -60,13 +60,13 @@ For local development, use `db:push` to quickly sync schema changes:
 2. **Push changes**
 
    ```bash
-   pnpm --filter @chat/backend db:push
+   pnpm --filter @chat/server db:push
    ```
 
 3. **Verify in Studio**
 
    ```bash
-   pnpm --filter @chat/backend db:studio
+   pnpm --filter @chat/server db:studio
    ```
 </Steps>
 
@@ -82,7 +82,7 @@ For production, use proper migration files:
 1. **Generate migration**
 
    ```bash
-   pnpm --filter @chat/backend db:generate
+   pnpm --filter @chat/server db:generate
    ```
 
    This creates a timestamped SQL file in `drizzle/migrations/`.
@@ -99,7 +99,7 @@ For production, use proper migration files:
 3. **Run migration**
 
    ```bash
-   pnpm --filter @chat/backend db:migrate
+   pnpm --filter @chat/server db:migrate
    ```
 </Steps>
 
@@ -241,7 +241,7 @@ export class UsersService {
 Schema not pushed:
 
 ```bash
-pnpm --filter @chat/backend db:push --force
+pnpm --filter @chat/server db:push --force
 ```
 
 ### Migration conflicts
@@ -253,7 +253,7 @@ Reset and regenerate:
 rm -rf apps/chat/apps/backend/drizzle/migrations/*
 
 # Regenerate
-pnpm --filter @chat/backend db:generate
+pnpm --filter @chat/server db:generate
 ```
 
 ### Connection refused

apps/docs/src/content/docs/development/local-development.mdx

@@ -139,7 +139,7 @@ If you see errors about missing tables/columns:
 
 ```bash
 # Push the latest schema
-pnpm --filter @chat/backend db:push --force
+pnpm --filter @chat/server db:push --force
 ```
 
 ### Port already in use

apps/docs/src/content/docs/development/testing.mdx

@@ -16,13 +16,13 @@ Manacore uses Jest for backend testing and Vitest for frontend testing.
 pnpm test
 
 # Run tests for specific project
-pnpm --filter @chat/backend test
+pnpm --filter @chat/server test
 
 # Run tests in watch mode
-pnpm --filter @chat/backend test:watch
+pnpm --filter @chat/server test:watch
 
 # Run with coverage
-pnpm --filter @chat/backend test:cov
+pnpm --filter @chat/server test:cov
 ```
 
 ## Test Structure

apps/docs/src/content/docs/getting-started/project-structure.mdx

@@ -124,7 +124,7 @@ Turborepo handles task orchestration with:
 
 | Type | Pattern | Example |
 |------|---------|---------|
-| App package | `@{project}/{app}` | `@chat/backend` |
+| App package | `@{project}/{app}` | `@chat/server` |
 | Shared package | `@manacore/shared-{name}` | `@manacore/shared-auth` |
 | Service | `@mana-{name}/service` | `@mana-search/service` |
 

apps/docs/src/content/docs/projects/chat.mdx

@@ -15,7 +15,7 @@ AI chat application supporting multiple language models including local (Ollama)
 
 | Component | Technology | Port |
 |-----------|------------|------|
-| Backend | NestJS | 3002 |
+| Server | Hono/Bun | 3002 |
 | Web | SvelteKit | 5173 |
 | Mobile | Expo | - |
 | Landing | Astro | - |
@@ -27,7 +27,7 @@ AI chat application supporting multiple language models including local (Ollama)
 pnpm dev:chat:full
 
 # Or individual components
-pnpm dev:chat:backend
+pnpm dev:chat:server
 pnpm dev:chat:web
 pnpm dev:chat:mobile
 ```
@@ -36,8 +36,8 @@ pnpm dev:chat:mobile
 
 ```
 ┌─────────────┐     ┌─────────────┐     ┌─────────────┐
-│   Client    │────>│   Backend   │────>│  AI Models  │
-│ (Web/Mobile)│     │   (NestJS)  │     │ Ollama/API  │
+│   Client    │────>│   Server    │────>│  AI Models  │
+│ (Web/Mobile)│     │ (Hono/Bun)  │     │ Ollama/API  │
 └─────────────┘     └──────┬──────┘     └─────────────┘
                            │
                            ▼
@@ -147,21 +147,21 @@ export const messages = pgTable('messages', {
 First time setup requires seeding AI models:
 
 ```bash
-pnpm --filter @chat/backend db:push
-pnpm --filter @chat/backend db:seed
+pnpm --filter @chat/server db:push
+pnpm --filter @chat/server db:seed
 ```
 
 ### Run Tests
 
 ```bash
-pnpm --filter @chat/backend test
-pnpm --filter @chat/backend test:e2e
+pnpm --filter @chat/server test
+pnpm --filter @chat/server test:e2e
 ```
 
 ### Open Database GUI
 
 ```bash
-pnpm --filter @chat/backend db:studio
+pnpm --filter @chat/server db:studio
 ```
 
 ## Links