Initial commit: LMS microservices scaffold

- Gradle multi-module: libs/{common-http,security-jwt,markdown,test-support},
  services/{identity,academic,progress,gateway}, web (Thymeleaf+htmx)
- identity-service: JWT auth (RSA), accounts, students, groups, enrollment,
  import from XLSX/CSV, credentials export, password reset
- academic-service: lab import from JSON/zip (markdown + YAML + variants),
  levels, API
- progress-service: schema for student levels and variant assignments
- gateway: Spring Cloud Gateway, JWT validation, route propagation
- web: Server-side UI with flex/footer layout, light/dark theme toggle,
  admin dashboard, groups CRUD, student portal placeholder
- docker-compose: PostgreSQL 18
- Tests: identity smoke test with Testcontainers

libs/security-jwt/src/main/kotlin/ru/ysu/lms/security/JwtPrincipal.kt

@@ -0,0 +1,15 @@
+package ru.ysu.lms.security
+
+enum class LmsRole {
+    ADMIN,
+    STUDENT;
+
+    fun authority(): String = "ROLE_$name"
+}
+
+data class JwtPrincipal(
+    val accountId: String,
+    val login: String,
+    val role: LmsRole,
+    val displayName: String? = null,
+)

libs/security-jwt/src/main/kotlin/ru/ysu/lms/security/JwtProperties.kt

@@ -0,0 +1,16 @@
+package ru.ysu.lms.security
+
+import org.springframework.boot.context.properties.ConfigurationProperties
+import java.time.Duration
+
+@ConfigurationProperties(prefix = "lms.jwt")
+data class JwtProperties(
+    val issuer: String = "lms",
+    /** PKCS#8 PEM private key. Empty disables the encoder. */
+    val privateKey: String = "",
+    /** X.509 PEM public key. Empty disables the decoder. */
+    val publicKey: String = "",
+    /** JWKS endpoint used to build the decoder when [publicKey] is empty. */
+    val jwkSetUri: String = "",
+    val accessTokenTtl: Duration = Duration.ofHours(12),
+)

libs/security-jwt/src/main/kotlin/ru/ysu/lms/security/LmsSecurityAutoConfiguration.kt

@@ -0,0 +1,48 @@
+package ru.ysu.lms.security
+
+import com.nimbusds.jose.jwk.JWKSet
+import com.nimbusds.jose.jwk.RSAKey
+import com.nimbusds.jose.jwk.source.ImmutableJWKSet
+import com.nimbusds.jose.proc.SecurityContext
+import org.springframework.boot.autoconfigure.AutoConfiguration
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
+import org.springframework.boot.context.properties.EnableConfigurationProperties
+import org.springframework.context.annotation.Bean
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder
+import org.springframework.security.crypto.password.PasswordEncoder
+import org.springframework.security.oauth2.jwt.JwtDecoder
+import org.springframework.security.oauth2.jwt.JwtEncoder
+import org.springframework.security.oauth2.jwt.NimbusJwtDecoder
+import org.springframework.security.oauth2.jwt.NimbusJwtEncoder
+
+@AutoConfiguration
+@EnableConfigurationProperties(JwtProperties::class)
+class LmsSecurityAutoConfiguration {
+
+    @Bean
+    @ConditionalOnMissingBean
+    @ConditionalOnProperty(prefix = "lms.jwt", name = ["private-key"])
+    fun jwtEncoder(properties: JwtProperties): JwtEncoder {
+        val rsaKey = RSAKey.Builder(RsaKeys.publicKey(properties.publicKey))
+            .privateKey(RsaKeys.privateKey(properties.privateKey))
+            .build()
+        return NimbusJwtEncoder(ImmutableJWKSet<SecurityContext>(JWKSet(rsaKey)))
+    }
+
+    @Bean
+    @ConditionalOnMissingBean
+    fun jwtDecoder(properties: JwtProperties): JwtDecoder =
+        if (properties.jwkSetUri.isNotBlank()) {
+            NimbusJwtDecoder.withJwkSetUri(properties.jwkSetUri).build()
+        } else {
+            require(properties.publicKey.isNotBlank()) {
+                "Configure either lms.jwt.jwk-set-uri or lms.jwt.public-key"
+            }
+            NimbusJwtDecoder.withPublicKey(RsaKeys.publicKey(properties.publicKey)).build()
+        }
+
+    @Bean
+    @ConditionalOnMissingBean
+    fun passwordEncoder(): PasswordEncoder = BCryptPasswordEncoder()
+}

libs/security-jwt/src/main/kotlin/ru/ysu/lms/security/RsaKeys.kt

@@ -0,0 +1,32 @@
+package ru.ysu.lms.security
+
+import java.security.KeyFactory
+import java.security.interfaces.RSAPrivateKey
+import java.security.interfaces.RSAPublicKey
+import java.security.spec.PKCS8EncodedKeySpec
+import java.security.spec.X509EncodedKeySpec
+import java.util.Base64
+
+/** Parses PEM-encoded RSA keys (PKCS#8 private, X.509 public). */
+object RsaKeys {
+
+    fun publicKey(pem: String): RSAPublicKey {
+        val der = decode(pem)
+        return KeyFactory.getInstance("RSA")
+            .generatePublic(X509EncodedKeySpec(der)) as RSAPublicKey
+    }
+
+    fun privateKey(pem: String): RSAPrivateKey {
+        val der = decode(pem)
+        return KeyFactory.getInstance("RSA")
+            .generatePrivate(PKCS8EncodedKeySpec(der)) as RSAPrivateKey
+    }
+
+    private fun decode(pem: String): ByteArray {
+        val body = pem
+            .replace(Regex("-----BEGIN [A-Z ]+-----"), "")
+            .replace(Regex("-----END [A-Z ]+-----"), "")
+            .replace(Regex("\\s"), "")
+        return Base64.getDecoder().decode(body)
+    }
+}

libs/security-jwt/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -0,0 +1 @@
+ru.ysu.lms.security.LmsSecurityAutoConfiguration