chore: update justfile commands and parameterize healthcheck info

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

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

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
@@ -21,7 +21,7 @@ services:
     restart: unless-stopped
     build: .
     ports:
-      - "3000:3000"    
+      - "3000:3000"
     depends_on:
       db:
         condition: service_healthy

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