docs: add README and env examples

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,5 @@
+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=your-password-here
+POSTGRES_DB=loft
+DATABASE_URL=postgres://postgres:your-password-here@db:5432/loft
+STORAGE_PATH=/app/storage

Justfile

@@ -1,7 +0,0 @@
-backend_path := "backend"
-
-watch:
-    cd {{backend_path}} && cargo watch -q -c -w src/ -x run
-
-watch-test:
-    cd {{backend_path}} && cargo watch -q -c -w src/ -x test

README.md

@@ -0,0 +1,41 @@
+# loft
+
+A minimal, self-hosted web app (with a cloud storage option planned), built as a learning exercise to get more familiar with Axum and Svelte.
+
+## What it does
+- Register / log in (session-based auth)
+- Upload, list, download, and delete files
+- Browse files in a grid/tile view with image preview and prev/next navigation
+- Stream file content via HTTP range requests — the groundwork for video streaming
+
+## Requirements
+- **To run:** Docker + Docker Compose — that's all (Rust/Node build inside the image).
+- **To develop:** Rust (cargo + `sqlx-cli`), Node + pnpm, `just`, and Docker (for Postgres).
+
+## Quick start
+```bash
+git clone https://git.stefiosif.dev/stefiosif/loft
+cd loft
+cp .env.example .env
+
+# Run in Docker (http://localhost:3000):
+docker compose up -d
+
+# Run locally (http://localhost:5173):
+cp backend/.env.example backend/.env
+just db-setup
+# inside tmux together frontend and backend
+just watch
+# or separately
+just watch-backend
+just watch-frontend
+
+# API docs (Swagger UI, generated with utoipa): http://localhost:3000/swagger-ui
+
+# Run tests:
+cp backend/.env.test.example backend/.env.test
+just watch-test
+```
+
+## Commands
+Run `just --list` to see all recipes.

backend/.env.example

@@ -0,0 +1,5 @@
+DATABASE_URL=postgres://postgres:your-password-here@localhost:5432/loft
+STORAGE_PATH=/tmp/loft-files
+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=your-password-here
+POSTGRES_DB=loft

backend/.env.test.example

@@ -0,0 +1,3 @@
+DATABASE_URL=postgres://postgres:your-password-here@localhost:5432/loft_test
+STORAGE_PATH=/tmp/loft-files-test
+ENVIRONMENT=test

backend/Cargo.lock

@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "adler2"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.4"
@@ -32,6 +38,15 @@ version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
 
+[[package]]
+name = "arbitrary"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3d036a3c4ab069c7b410a2ce876bd74808d2d0888a82667669f8e783a898bf1"
+dependencies = [
+ "derive_arbitrary",
+]
+
 [[package]]
 name = "argon2"
 version = "0.5.3"
@@ -205,6 +220,8 @@ dependencies = [
  "tower_governor",
  "tracing",
  "tracing-subscriber",
+ "utoipa",
+ "utoipa-swagger-ui",
 ]
 
 [[package]]
@@ -424,6 +441,15 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "217698eaf96b4a3f0bc4f3662aaa55bdf913cd54d7204591faa790070c6d0853"
 
+[[package]]
+name = "crc32fast"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9481c1c90cbf2ac953f07c8d4a58aa3945c425b7185c9154d67a65e4230da511"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "crossbeam-queue"
 version = "0.3.12"
@@ -499,6 +525,17 @@ dependencies = [
  "powerfmt",
 ]
 
+[[package]]
+name = "derive_arbitrary"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e567bd82dcff979e4b03460c307b3cdc9e96fde3d73bed1496d2bc75d9dd62a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "diff"
 version = "0.1.13"
@@ -672,6 +709,16 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
+[[package]]
+name = "flate2"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "843fba2746e448b37e26a819579957415c8cef339bf08564fe8b7ddbd959573c"
+dependencies = [
+ "miniz_oxide",
+ "zlib-rs",
+]
+
 [[package]]
 name = "flume"
 version = "0.11.1"
@@ -1538,6 +1585,16 @@ dependencies = [
  "unicase",
 ]
 
+[[package]]
+name = "miniz_oxide"
+version = "0.8.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fa76a2c86f704bdb222d66965fb3d63269ce38518b83cb0575fca855ebb6316"
+dependencies = [
+ "adler2",
+ "simd-adler32",
+]
+
 [[package]]
 name = "mio"
 version = "1.2.0"
@@ -2333,6 +2390,40 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "rust-embed"
+version = "8.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04113cb9355a377d83f06ef1f0a45b8ab8cd7d8b1288160717d66df5c7988d27"
+dependencies = [
+ "rust-embed-impl",
+ "rust-embed-utils",
+ "walkdir",
+]
+
+[[package]]
+name = "rust-embed-impl"
+version = "8.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da0902e4c7c8e997159ab384e6d0fc91c221375f6894346ae107f47dd0f3ccaa"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "rust-embed-utils",
+ "syn",
+ "walkdir",
+]
+
+[[package]]
+name = "rust-embed-utils"
+version = "8.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5bcdef0be6fe7f6fa333b1073c949729274b05f123a0ad7efcb8efd878e5c3b1"
+dependencies = [
+ "sha2",
+ "walkdir",
+]
+
 [[package]]
 name = "rust-multipart-rfc7578_2"
 version = "0.9.0"
@@ -2681,6 +2772,12 @@ dependencies = [
  "rand_core 0.6.4",
 ]
 
+[[package]]
+name = "simd-adler32"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "703d5c7ef118737c72f1af64ad2f6f8c5e1921f818cdcb97b8fe6fc69bf66214"
+
 [[package]]
 name = "simd_cesu8"
 version = "1.1.1"
@@ -3424,6 +3521,48 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
 
+[[package]]
+name = "utoipa"
+version = "5.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8bde15df68e80b16c7d16b9616e80770ad158988daa56a27dccd1e55558b0160"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_json",
+ "utoipa-gen",
+]
+
+[[package]]
+name = "utoipa-gen"
+version = "5.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ba0b99ee52df3028635d93840c797102da61f8a7bb3cf751032455895b52ef8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "regex",
+ "syn",
+]
+
+[[package]]
+name = "utoipa-swagger-ui"
+version = "9.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d047458f1b5b65237c2f6dc6db136945667f40a7668627b3490b9513a3d43a55"
+dependencies = [
+ "axum",
+ "base64",
+ "mime_guess",
+ "regex",
+ "rust-embed",
+ "serde",
+ "serde_json",
+ "url",
+ "utoipa",
+ "zip",
+]
+
 [[package]]
 name = "uuid"
 version = "1.23.1"
@@ -4113,8 +4252,40 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "zip"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12598812502ed0105f607f941c386f43d441e00148fce9dec3ca5ffb0bde9308"
+dependencies = [
+ "arbitrary",
+ "crc32fast",
+ "flate2",
+ "indexmap",
+ "memchr",
+ "zopfli",
+]
+
+[[package]]
+name = "zlib-rs"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3be3d40e40a133f9c916ee3f9f4fa2d9d63435b5fbe1bfc6d9dae0aa0ada1513"
+
 [[package]]
 name = "zmij"
 version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
+
+[[package]]
+name = "zopfli"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f05cd8797d63865425ff89b5c4a48804f35ba0ce8d125800027ad6017d2b5249"
+dependencies = [
+ "bumpalo",
+ "crc32fast",
+ "log",
+ "simd-adler32",
+]

backend/Cargo.toml

@@ -23,6 +23,8 @@ rand = "0.10.1"
 futures-util = "0.3.32"
 mime_guess = "2.0.5"
 tower_governor = { version = "0.8.0", default-features = false, features = ["axum", "tracing"] }
+utoipa = { version = "5.5.0", features = ["axum_extras", "chrono"] }
+utoipa-swagger-ui = { version = "9.0.2", features = ["axum"] }
 
 [dev-dependencies]
 axum-test = "20.0.0"

backend/src/main.rs

@@ -24,14 +24,16 @@ use tower_http::{
 };
 use tracing::info;
 use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
+use utoipa::OpenApi;
+use utoipa_swagger_ui::SwaggerUi;
 
 use crate::{
     model::{FileRepository, UserRepository},
     web::{
         mw_auth::{mw_ctx_resolver, mw_require_auth},
-        routes_file::routes_file,
-        routes_health::routes_health,
-        routes_login::routes_auth,
+        routes_file::{FileApi, routes_file},
+        routes_health::{HealthApi, routes_health},
+        routes_login::{AuthApi, routes_auth},
     },
 };
 
@@ -84,10 +86,15 @@ async fn main() -> Result<()> {
         routes_auth = routes_auth.layer(GovernorLayer::new(governor_conf_auth));
     }
 
+    let mut openapi = AuthApi::openapi();
+    openapi.merge(FileApi::openapi());
+    openapi.merge(HealthApi::openapi());
+
     let app = Router::new()
         .nest("/api", routes_file)
         .nest("/api/auth", routes_auth)
         .merge(routes_health())
+        .merge(SwaggerUi::new("/swagger-ui").url("/api-docs/openapi.json", openapi))
         .layer(TraceLayer::new_for_http())
         .layer(middleware::from_fn_with_state(
             user_repository,

backend/src/model.rs

@@ -6,7 +6,7 @@ use sqlx::{PgPool, prelude::FromRow};
 
 use crate::error::{LoftError, Result};
 
-#[derive(Clone, Debug, Serialize, FromRow)]
+#[derive(Clone, Debug, Serialize, FromRow, utoipa::ToSchema)]
 #[serde(rename_all = "camelCase")]
 pub struct FileRecord {
     pub id: i64,

backend/src/web/routes_file.rs

@@ -7,6 +7,7 @@ use axum::{
     routing::get,
 };
 use sqlx::types::uuid;
+use utoipa::OpenApi;
 
 use crate::{
     ctx::Ctx,
@@ -14,6 +15,20 @@ use crate::{
     model::{FileRecord, FileRepository},
 };
 
+#[derive(OpenApi)]
+#[openapi(
+    paths(
+        list_files,
+        upload_file,
+        get_file,
+        delete_file,
+        download_file,
+        stream_part
+    ),
+    components(schemas(FileRecord))
+)]
+pub struct FileApi;
+
 pub fn routes_file(file_repository: FileRepository) -> Router {
     Router::new()
         .route("/files", get(list_files).post(upload_file))
@@ -23,11 +38,25 @@ pub fn routes_file(file_repository: FileRepository) -> Router {
         .with_state(file_repository)
 }
 
+/// Upload a file
+#[utoipa::path(
+    post,
+    path = "/api/files",
+    tag = "files",
+    security(("cookie_auth" = [])),
+    request_body(content_type = "multipart/form-data", description = "Multipart form with a `file` field"),
+    responses(
+        (status = 201, description = "Uploaded file metadata", body = FileRecord),
+        (status = 400, description = "No file provided or malformed upload"),
+        (status = 401, description = "Unauthorized"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 async fn upload_file(
     State(file_repository): State<FileRepository>,
     ctx: Ctx,
     mut multipart: Multipart,
-) -> Result<Json<FileRecord>> {
+) -> Result<(StatusCode, Json<FileRecord>)> {
     let mut uploaded: Option<(String, String, usize)> = None;
 
     while let Some(field) = multipart.next_field().await? {
@@ -45,9 +74,23 @@ async fn upload_file(
         .create_file_record(ctx.user_id(), &name, size, &key)
         .await?;
 
-    Ok(Json(file_record))
+    Ok((StatusCode::CREATED, Json(file_record)))
 }
 
+/// Get a file's metadata
+#[utoipa::path(
+    get,
+    path = "/api/files/{id}",
+    tag = "files",
+    security(("cookie_auth" = [])),
+    params(("id" = u64, Path, description = "File id")),
+    responses(
+        (status = 200, description = "File metadata", body = FileRecord),
+        (status = 404, description = "File not found"),
+        (status = 401, description = "Unauthorized"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 async fn get_file(
     State(file_repository): State<FileRepository>,
     ctx: Ctx,
@@ -59,6 +102,20 @@ async fn get_file(
     Ok(Json(record))
 }
 
+/// Download a file
+#[utoipa::path(
+    get,
+    path = "/api/files/{id}/download",
+    tag = "files",
+    security(("cookie_auth" = [])),
+    params(("id" = u64, Path, description = "File id")),
+    responses(
+        (status = 200, description = "File bytes", content_type = "application/octet-stream"),
+        (status = 404, description = "File not found"),
+        (status = 401, description = "Unauthorized"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 async fn download_file(
     State(file_repository): State<FileRepository>,
     ctx: Ctx,
@@ -70,6 +127,24 @@ async fn download_file(
     Ok(Body::from_stream(stream))
 }
 
+/// Stream a byte range of a file (HTTP 206)
+#[utoipa::path(
+    get,
+    path = "/api/files/{id}/stream_part",
+    tag = "files",
+    security(("cookie_auth" = [])),
+    params(
+        ("id" = u64, Path, description = "File id"),
+        ("Range" = Option<String>, Header, description = "Byte range, e.g. bytes=0-1023")
+    ),
+    responses(
+        (status = 206, description = "Partial content"),
+        (status = 400, description = "Invalid range"),
+        (status = 404, description = "File not found"),
+        (status = 401, description = "Unauthorized"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 async fn stream_part(
     State(file_repository): State<FileRepository>,
     ctx: Ctx,
@@ -117,6 +192,20 @@ fn parse_range(headers: &HeaderMap, file_size: u64) -> Result<(u64, u64)> {
     Ok((start, end))
 }
 
+/// Delete a file
+#[utoipa::path(
+    delete,
+    path = "/api/files/{id}",
+    tag = "files",
+    security(("cookie_auth" = [])),
+    params(("id" = u64, Path, description = "File id")),
+    responses(
+        (status = 200, description = "Deleted file metadata", body = FileRecord),
+        (status = 404, description = "File not found"),
+        (status = 401, description = "Unauthorized"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 async fn delete_file(
     State(file_repository): State<FileRepository>,
     ctx: Ctx,
@@ -128,6 +217,18 @@ async fn delete_file(
     Ok(Json(file))
 }
 
+/// List the current user's files
+#[utoipa::path(
+    get,
+    path = "/api/files",
+    tag = "files",
+    security(("cookie_auth" = [])),
+    responses(
+        (status = 200, description = "List user's files", body = Vec<FileRecord>),
+        (status = 401, description = "Unauthorized"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 async fn list_files(
     State(file_repository): State<FileRepository>,
     ctx: Ctx,
@@ -138,7 +239,11 @@ async fn list_files(
 
 #[cfg(test)]
 mod tests {
-    use axum::{Router, http::header, middleware};
+    use axum::{
+        Router,
+        http::{StatusCode, header},
+        middleware,
+    };
     use axum_test::{
         TestServer,
         multipart::{MultipartForm, Part},
@@ -284,7 +389,7 @@ mod tests {
             ))
             .await;
 
-        res.assert_status_ok();
+        res.assert_status(StatusCode::CREATED);
         let file = res.json::<serde_json::Value>();
         assert_eq!(file["name"], "a.jpg");
 

backend/src/web/routes_health.rs

@@ -1,9 +1,21 @@
 use axum::{Router, routing::get};
+use utoipa::OpenApi;
+
+#[derive(OpenApi)]
+#[openapi(paths(health))]
+pub struct HealthApi;
 
 pub fn routes_health() -> Router {
     Router::new().route("/health", get(health))
 }
 
+/// Health check
+#[utoipa::path(
+    get,
+    path = "/health",
+    tag = "health",
+    responses((status = 200, description = "Service is healthy"))
+)]
 async fn health() -> &'static str {
     "up"
 }

backend/src/web/routes_login.rs

@@ -4,9 +4,13 @@ use argon2::{
 };
 use axum::{Json, Router, extract::State, http::StatusCode, routing::post};
 use rand::RngExt;
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 use tower_cookies::{Cookie, Cookies};
 use tracing::warn;
+use utoipa::{
+    Modify, OpenApi,
+    openapi::security::{ApiKey, ApiKeyValue, SecurityScheme},
+};
 
 use crate::{
     error::{LoftError, Result},
@@ -14,6 +18,32 @@ use crate::{
     web::AUTH_TOKEN,
 };
 
+#[derive(OpenApi)]
+#[openapi(
+    info(
+        title = "loft API",
+        description = "Self-hosted media storage (Axum + SvelteKit)"
+    ),
+    modifiers(&SecurityAddon),
+    paths(login, logout, register),
+    components(schemas(LoginPayload))
+)]
+pub struct AuthApi;
+
+/// Registers the session-cookie auth scheme so protected endpoints show as secured.
+struct SecurityAddon;
+
+impl Modify for SecurityAddon {
+    fn modify(&self, openapi: &mut utoipa::openapi::OpenApi) {
+        if let Some(components) = openapi.components.as_mut() {
+            components.add_security_scheme(
+                "cookie_auth",
+                SecurityScheme::ApiKey(ApiKey::Cookie(ApiKeyValue::new(AUTH_TOKEN))),
+            );
+        }
+    }
+}
+
 pub fn routes_auth(user_repository: UserRepository) -> Router {
     Router::new()
         .route("/login", post(login))
@@ -22,6 +52,18 @@ pub fn routes_auth(user_repository: UserRepository) -> Router {
         .with_state(user_repository)
 }
 
+/// Log in and start a session
+#[utoipa::path(
+    post,
+    path = "/api/auth/login",
+    tag = "auth",
+    request_body = LoginPayload,
+    responses(
+        (status = 200, description = "Login successful"),
+        (status = 401, description = "Login failed"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 async fn login(
     State(user_repository): State<UserRepository>,
     cookies: Cookies,
@@ -50,6 +92,17 @@ async fn login(
     Ok(StatusCode::OK)
 }
 
+/// Log out and clear the session
+#[utoipa::path(
+    post,
+    path = "/api/auth/logout",
+    tag = "auth",
+    // request_body = LoginPayload,
+    responses(
+        (status = 200, description = "Logout successful"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 async fn logout(
     State(user_repository): State<UserRepository>,
     cookies: Cookies,
@@ -64,6 +117,18 @@ async fn logout(
     Ok(StatusCode::OK)
 }
 
+/// Register a new account
+#[utoipa::path(
+    post,
+    path = "/api/auth/register",
+    tag = "auth",
+    // request_body = LoginPayload,
+    responses(
+        (status = 201, description = "Registration successful"),
+        (status = 401, description = "Registration failed"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 async fn register(
     State(user_repository): State<UserRepository>,
     Json(payload): Json<LoginPayload>,
@@ -76,7 +141,7 @@ async fn register(
         warn!(
             "Register fail, username {} already exists",
             &payload.username
-        ); // also fix "Login fail" typo
+        );
         return Err(LoftError::RegisterFail);
     }
 
@@ -108,7 +173,7 @@ fn create_cookie() -> Cookie<'static> {
         .build()
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, utoipa::ToSchema)]
 struct LoginPayload {
     username: String,
     password: String,

compose.yml

@@ -11,7 +11,7 @@ services:
     volumes:
       - loft_db_data:/var/lib/postgresql/data
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U postgres -d loft"]
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}"]
       interval: 5s
       timeout: 5s
       retries: 5

frontend/src/lib/components/FilePreview.svelte

@@ -2,16 +2,45 @@
     import type { FileRecord } from '$lib/types';
     import { fade } from 'svelte/transition';
     import VideoPreview from './VideoPreview.svelte';
+    import ImagePreview from './ImagePreview.svelte';
+
+    let {
+        file,
+        onclose,
+        onprev,
+        onnext,
+        hasPrev = false,
+        hasNext = false
+    }: {
+        file: FileRecord;
+        onclose: () => void;
+        onprev?: () => void;
+        onnext?: () => void;
+        hasPrev?: boolean;
+        hasNext?: boolean;
+    } = $props();
 
-    let { file, onclose }: { file: FileRecord; onclose: () => void } = $props();
     const isVideo = $derived(file.fileType.includes('video'));
-</script>
+    const isImage = $derived(file.fileType.includes('image'));
 
-<svelte:window
-    onkeydown={(e) => {
-        if (e.key === 'Escape') onclose();
-    }}
-/>
+    $effect(() => {
+        function onKeydown(e: KeyboardEvent) {
+            if (e.key === 'Escape') {
+                onclose();
+            } else if (e.key === 'ArrowLeft' && hasPrev) {
+                e.preventDefault();
+                e.stopPropagation();
+                onprev?.();
+            } else if (e.key === 'ArrowRight' && hasNext) {
+                e.preventDefault();
+                e.stopPropagation();
+                onnext?.();
+            }
+        }
+        window.addEventListener('keydown', onKeydown, { capture: true });
+        return () => window.removeEventListener('keydown', onKeydown, { capture: true });
+    });
+</script>
 
 <!-- svelte-ignore a11y_click_events_have_key_events -->
 <!-- svelte-ignore a11y_no_static_element_interactions -->
@@ -20,12 +49,73 @@
     onclick={onclose}
     transition:fade={{ duration: 150 }}
 >
+    {#if hasPrev}
+        <button
+            class="absolute top-1/2 left-4 z-10 -translate-y-1/2 cursor-pointer rounded-full bg-black/40 p-2 text-white/70 transition-colors hover:bg-black/60 hover:text-white"
+            onclick={(e) => {
+                e.stopPropagation();
+                onprev?.();
+            }}
+            aria-label="Previous"
+        >
+            <svg
+                xmlns="http://www.w3.org/2000/svg"
+                class="h-5 w-5"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+                stroke-linecap="round"
+                stroke-linejoin="round"
+            >
+                <polyline points="15 18 9 12 15 6" />
+            </svg>
+        </button>
+    {/if}
+
+    {#if hasNext}
+        <button
+            class="absolute top-1/2 right-4 z-10 -translate-y-1/2 cursor-pointer rounded-full bg-black/40 p-2 text-white/70 transition-colors hover:bg-black/60 hover:text-white"
+            onclick={(e) => {
+                e.stopPropagation();
+                onnext?.();
+            }}
+            aria-label="Next"
+        >
+            <svg
+                xmlns="http://www.w3.org/2000/svg"
+                class="h-5 w-5"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+                stroke-linecap="round"
+                stroke-linejoin="round"
+            >
+                <polyline points="9 18 15 12 9 6" />
+            </svg>
+        </button>
+    {/if}
+
     <div
-        class="relative aspect-video h-[85vh] max-w-[95vw] overflow-hidden rounded-xl border border-sky-200/20 bg-[#0f1117]"
+        class="relative overflow-hidden rounded-xl border border-sky-200/20 bg-[#0f1117] {isImage
+            ? 'max-h-[85vh] max-w-[95vw]'
+            : 'aspect-video h-[85vh] max-w-[95vw]'}"
         onclick={(e) => e.stopPropagation()}
     >
+        {#key file.id}
             {#if isVideo}
                 <VideoPreview src={`/api/files/${file.id}/stream_part`} />
+            {:else if isImage}
+                <ImagePreview src={`/api/files/${file.id}/download`} alt={file.name} />
+            {:else}
+                <div class="flex h-full w-full items-center justify-center text-sm text-white/40">
+                    No preview available
+                </div>
+            {/if}
+        {/key}
+
+        {#if isVideo || isImage}
             <div
                 class="pointer-events-none absolute inset-x-0 top-0 z-10 flex items-center justify-between bg-linear-to-b from-black/70 to-transparent px-4 py-3"
             >
@@ -52,10 +142,6 @@
                     </svg>
                 </button>
             </div>
-        {:else}
-            <div class="flex h-full w-full items-center justify-center text-sm text-white/40">
-                No preview available
-            </div>
         {/if}
     </div>
 </div>

frontend/src/lib/components/ImagePreview.svelte

@@ -0,0 +1,5 @@
+<script lang="ts">
+    let { src, alt }: { src: string; alt: string } = $props();
+</script>
+
+<img {src} {alt} class="block max-h-[85vh] max-w-[95vw] object-contain" />

frontend/src/routes/+page.svelte

@@ -29,6 +29,27 @@
         fileRecords.filter((f) => f.name.toLowerCase().includes(search.toLowerCase()))
     );
 
+    let previewIndex = $derived.by(() => {
+        if (!previewFile) {
+            return -1;
+        }
+        const id = previewFile.id;
+        return filteredFileRecords.findIndex((f) => f.id === id);
+    });
+    let hasPrev = $derived(previewIndex > 0);
+    let hasNext = $derived(previewIndex >= 0 && previewIndex < filteredFileRecords.length - 1);
+
+    function goPrev() {
+        if (hasPrev) {
+            previewFile = filteredFileRecords[previewIndex - 1];
+        }
+    }
+    function goNext() {
+        if (hasNext) {
+            previewFile = filteredFileRecords[previewIndex + 1];
+        }
+    }
+
     let fileInput: HTMLInputElement;
 
     async function handleUpload(event: Event) {
@@ -214,5 +235,12 @@
 </div>
 
 {#if previewFile}
-    <FilePreview file={previewFile} onclose={() => (previewFile = null)} />
+    <FilePreview
+        file={previewFile}
+        onclose={() => (previewFile = null)}
+        onprev={goPrev}
+        onnext={goNext}
+        {hasPrev}
+        {hasNext}
+    />
 {/if}

justfile

@@ -0,0 +1,106 @@
+backend_path := "backend"
+frontend_path := "frontend"
+
+# Run backend + frontend watchers in split tmux panes (run from inside tmux)
+[group('dev')]
+watch:
+    #!/usr/bin/env bash
+    tmux split-window -h 'just watch-frontend'
+    just watch-backend
+
+# Run the backend with hot reload
+[group('dev')]
+watch-backend:
+    cd {{backend_path}} && cargo watch -q -c -w src/ -x run
+
+# Run the frontend dev server
+[group('dev')]
+watch-frontend:
+    cd {{frontend_path}} && pnpm dev
+
+# Run the backend tests in watch mode (sets up the test DB first)
+[group('test')]
+watch-test: test-db-setup
+    cd {{backend_path}} && cargo watch -q -c -w src/ -x test
+
+# Run the Playwright e2e suite (sets up the test DB + servers)
+[group('test')]
+e2e:
+    mkdir -p /tmp/loft-files-test
+    cd {{backend_path}} && set -a && . ./.env.test && set +a && (sqlx database create 2>/dev/null || true) && sqlx migrate run
+    docker compose exec -T db psql -U postgres -d loft_test -c "TRUNCATE users, sessions, file_records CASCADE"
+    cd {{frontend_path}} && pnpm exec playwright test
+
+# Format backend + frontend
+[group('quality')]
+fmt: fmt-backend fmt-frontend
+
+# Format the backend (cargo fmt)
+[group('quality')]
+fmt-backend:
+    cd {{backend_path}} && cargo fmt
+
+# Format the frontend (prettier)
+[group('quality')]
+fmt-frontend:
+    cd {{frontend_path}} && pnpm exec prettier --write .
+
+# Lint the backend (cargo clippy)
+[group('quality')]
+lint-backend:
+    cd {{backend_path}} && cargo clippy
+
+# Stage the given files (git add)
+[group('git')]
+stage +files:
+    git add {{files}}
+
+# Commit staged changes with a message
+[group('git')]
+commit message:
+    git commit -m "{{message}}"
+
+# Commit staged changes with a Claude co-author trailer
+[group('git')]
+co-commit message:
+    git commit -m "{{message}}" -m "Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>"
+
+# Push main to both the github and gitea remotes
+[group('git')]
+push:
+    git push -u github main && git push -u gitea main
+
+# Create (if missing) + migrate the test database
+[group('db')]
+test-db-setup: db-up
+    cd {{backend_path}} && set -a && . ./.env.test && set +a && (sqlx database create 2>/dev/null || true) && sqlx migrate run
+
+# Bring up the dev database container
+[group('db')]
+db-up:
+    docker compose up -d db
+
+# Create (if missing) + migrate the dev database
+[group('db')]
+db-setup: db-up
+    cd {{backend_path}} && set -a && . ./.env && set +a && (sqlx database create 2>/dev/null || true) && sqlx migrate run
+
+# Apply pending migrations to the dev database
+[group('db')]
+migrate:
+    cd {{backend_path}} && set -a && . ./.env && set +a && sqlx migrate run
+
+# Open a psql shell on the dev database
+[group('db')]
+db-shell:
+    docker compose exec db psql -U postgres -d loft
+
+# Run a SQL query against the dev database
+[group('db')]
+db-query query:
+    docker compose exec db psql -U postgres -d loft -c "{{query}}"
+
+# Open a shell inside the app container
+[group('db')]
+app-shell:
+    docker compose exec app sh