fix(setup): reduce friction in installation procedure

- Add Language default ("jp") so missing field no longer produces empty
  string, and include language selector in setup wizard
- Add --setup flag to re-run wizard even when config.json exists,
  providing a recovery path for corrupted configs
- Auto-apply seed data on fresh databases so users who skip the wizard
  still get shops, events, and gacha
- Fix stale docs referencing non-existent init/setup.sh and
  schemas/patch-schema/ in docker/README, CONTRIBUTING, and README

CONTRIBUTING.md

@@ -153,25 +153,18 @@ func TestYourFunction(t *testing.T) {
 
 ## Database Schema Changes
 
-### Patch Schemas (Development)
+Erupe uses an embedded auto-migrating schema system in `server/migrations/`.
 
-When actively developing new features that require schema changes:
+When adding schema changes:
 
-1. Create a new file in `schemas/patch-schema/` with format: `NN_description.sql`
-2. Increment the number from the last patch
-3. Test the migration on a clean database
-4. Document what the patch does in comments
+1. Create a new file in `server/migrations/sql/` with format: `NNNN_description.sql` (e.g. `0002_add_new_table.sql`)
+2. Increment the number from the last migration
+3. Test the migration on both a fresh and existing database
+4. Document what the migration does in SQL comments
 
-**Important**: Patch schemas are temporary and may change during development.
+Migrations run automatically on startup in order. Each runs in its own transaction and is tracked in the `schema_version` table.
 
-### Update Schemas (Production)
-
-For release-ready schema changes:
-
-1. Consolidate patch schemas into update schemas
-2. Create a new file in appropriate schema directory
-3. Update schema version tracking
-4. Test migration paths from previous versions
+For seed/demo data (shops, events, gacha), add files to `server/migrations/seed/`. Seed data is applied automatically on fresh databases and can be re-applied via the setup wizard.
 
 ## Documentation Requirements
 

README.md

@@ -197,14 +197,10 @@ Multiple channel servers can run simultaneously, organized by world types: Newbi
 
 ## Database Schemas
 
-Erupe uses a structured schema system:
+Erupe uses an embedded auto-migrating schema system. Migrations in [server/migrations/sql/](./server/migrations/sql/) are applied automatically on startup — no manual SQL steps needed.
 
-- **Initialization Schema**: Bootstraps database to version 9.1.0
-- **Update Schemas**: Production-ready updates for new releases
-- **Patch Schemas**: Development updates (subject to change)
-- **Seed Data**: Demo templates for shops, distributions, events, and gacha in [server/migrations/seed/](./server/migrations/seed/)
-
-**Note**: Only use patch schemas if you're following active development. They get consolidated into update schemas on release.
+- **Migrations**: Numbered SQL files (`0001_init.sql`, `0002_*.sql`, ...) tracked in a `schema_version` table
+- **Seed Data**: Demo templates for shops, distributions, events, and gacha in [server/migrations/seed/](./server/migrations/seed/) — applied automatically on fresh databases
 
 ## Development
 
@@ -237,7 +233,7 @@ go test -v -race ./...     # Check for race conditions (mandatory before merging
 
 ### Database schema errors
 
-- Ensure all patch files are applied in order
+- Schema migrations run automatically on startup — check the server logs for migration errors
 - Check PostgreSQL logs for detailed error messages
 - Verify database user has sufficient privileges
 

config/config.go

@@ -342,6 +342,7 @@ func getOutboundIP4() (net.IP, error) {
 // config.json (just database credentials) produces a fully working server.
 func registerDefaults() {
 	// Top-level settings
+	viper.SetDefault("Language", "jp")
 	viper.SetDefault("BinPath", "bin")
 	viper.SetDefault("HideLoginNotice", true)
 	viper.SetDefault("LoginNotices", []string{

docker/README.md

@@ -19,7 +19,7 @@
    docker compose up
    ```
 
-The database is automatically initialized and patched on first start via `init/setup.sh`.
+The database schema is automatically applied on first start via the embedded migration system.
 
 pgAdmin is available at `http://localhost:5050` (default login: `user@pgadmin.com` / `password`).
 
@@ -45,18 +45,14 @@ To delete all persistent data, remove these directories after stopping:
 
 ## Updating
 
-After pulling new changes:
+After pulling new changes, rebuild and restart. Schema migrations are applied automatically on startup.
 
-1. Check for new patch schemas in `schemas/patch-schema/` — apply them via pgAdmin or `psql` into the running database container.
-
-2. Rebuild and restart:
-
-   ```bash
-   docker compose down
-   docker compose build
-   docker compose up
-   ```
+```bash
+docker compose down
+docker compose build
+docker compose up
+```
 
 ## Troubleshooting
 
-**Postgres won't populate on Windows**: `init/setup.sh` must use LF line endings, not CRLF. Open it in your editor and convert.
+**Postgres won't start on Windows**: Ensure `docker/db-data/` doesn't contain stale data from a different PostgreSQL version. Delete it and restart to reinitialize.

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	cfg "erupe-ce/config"
+	"flag"
 	"fmt"
 	"net"
 	"os"
@@ -71,6 +72,9 @@ func setupDiscordBot(config *cfg.Config, logger *zap.Logger) *discordbot.Discord
 }
 
 func main() {
+	runSetup := flag.Bool("setup", false, "Launch the setup wizard (even if config.json exists)")
+	flag.Parse()
+
 	var err error
 
 	var zapLogger *zap.Logger
@@ -79,6 +83,13 @@ func main() {
 	defer func() { _ = zapLogger.Sync() }()
 	logger := zapLogger.Named("main")
 
+	if *runSetup {
+		logger.Info("Launching setup wizard (--setup)")
+		if err := setup.Run(logger.Named("setup"), 8080); err != nil {
+			logger.Fatal("Setup wizard failed", zap.Error(err))
+		}
+	}
+
 	config, cfgErr := cfg.LoadConfig()
 	if cfgErr != nil {
 		if _, err := os.Stat("config.json"); os.IsNotExist(err) {
@@ -156,6 +167,7 @@ func main() {
 	logger.Info("Database: Started successfully")
 
 	// Run database migrations
+	verBefore, _ := migrations.Version(db)
 	applied, migErr := migrations.Migrate(db, logger.Named("migrations"))
 	if migErr != nil {
 		preventClose(config, fmt.Sprintf("Database migration failed: %s", migErr.Error()))
@@ -165,6 +177,18 @@ func main() {
 		logger.Info(fmt.Sprintf("Database: Applied %d migration(s), now at version %d", applied, ver))
 	}
 
+	// Auto-apply seed data on a fresh database so users who skip the wizard
+	// still get shops, events, and gacha. Seed files use ON CONFLICT DO NOTHING
+	// so this is safe to run even if data already exists.
+	if verBefore == 0 && applied > 0 {
+		seedApplied, seedErr := migrations.ApplySeedData(db, logger.Named("migrations"))
+		if seedErr != nil {
+			logger.Warn(fmt.Sprintf("Seed data failed: %s", seedErr.Error()))
+		} else if seedApplied > 0 {
+			logger.Info(fmt.Sprintf("Database: Applied %d seed data file(s)", seedApplied))
+		}
+	}
+
 	// Pre-compute all server IDs this instance will own, so we only
 	// delete our own rows (safe for multi-instance on the same DB).
 	var ownedServerIDs []string

server/setup/wizard.go

@@ -26,6 +26,7 @@ type FinishRequest struct {
 	DBPassword        string `json:"dbPassword"`
 	DBName            string `json:"dbName"`
 	Host              string `json:"host"`
+	Language          string `json:"language"`
 	ClientMode        string `json:"clientMode"`
 	AutoCreateAccount bool   `json:"autoCreateAccount"`
 }
@@ -33,8 +34,13 @@ type FinishRequest struct {
 // buildDefaultConfig produces a minimal config map with only user-provided values.
 // All other settings are filled by Viper's registered defaults at load time.
 func buildDefaultConfig(req FinishRequest) map[string]interface{} {
+	lang := req.Language
+	if lang == "" {
+		lang = "jp"
+	}
 	return map[string]interface{}{
 		"Host":              req.Host,
+		"Language":          lang,
 		"ClientMode":        req.ClientMode,
 		"AutoCreateAccount": req.AutoCreateAccount,
 		"Database": map[string]interface{}{

server/setup/wizard.html

@@ -145,10 +145,20 @@ h1{font-size:1.75rem;margin-bottom:.5rem;color:#e94560;text-align:center}
     </div>
     <div style="font-size:.75rem;color:#666;margin-top:.3rem">Use 127.0.0.1 for local play, or auto-detect for LAN/internet play.</div>
   </div>
-  <div class="field">
-    <label>Client Mode</label>
-    <select id="srv-client-mode"></select>
-    <div style="font-size:.75rem;color:#666;margin-top:.3rem">Must match your game client version. ZZ is the latest.</div>
+  <div class="field-row">
+    <div class="field">
+      <label>Client Mode</label>
+      <select id="srv-client-mode"></select>
+      <div style="font-size:.75rem;color:#666;margin-top:.3rem">Must match your game client version. ZZ is the latest.</div>
+    </div>
+    <div class="field field-sm">
+      <label>Language</label>
+      <select id="srv-language">
+        <option value="jp" selected>jp</option>
+        <option value="en">en</option>
+      </select>
+      <div style="font-size:.75rem;color:#666;margin-top:.3rem">Game text language.</div>
+    </div>
   </div>
   <label class="checkbox" style="margin-top:1rem"><input type="checkbox" id="srv-auto-create" checked> Auto-create accounts (recommended for private servers)</label>
   <div class="actions">
@@ -339,6 +349,7 @@ function buildReview() {
     ['Database Password', masked],
     ['Database Name', document.getElementById('db-name').value],
     ['Server Host', document.getElementById('srv-host').value],
+    ['Language', document.getElementById('srv-language').value],
     ['Client Mode', document.getElementById('srv-client-mode').value],
     ['Auto-create Accounts', document.getElementById('srv-auto-create').checked ? 'Yes' : 'No'],
   ];
@@ -362,6 +373,7 @@ async function finish() {
         dbPassword: document.getElementById('db-password').value,
         dbName: document.getElementById('db-name').value,
         host: document.getElementById('srv-host').value,
+        language: document.getElementById('srv-language').value,
         clientMode: document.getElementById('srv-client-mode').value,
         autoCreateAccount: document.getElementById('srv-auto-create').checked,
       })