feat: add auth, sql migrations, and modular structure

Author: fchchen

AGENTS.md

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+# Repository Guidelines
+
+## Project Structure & Module Organization
+- `Propel.Api/` hosts the .NET 10 Minimal API backend (entry point in `Program.cs`, data in `Data/`, entities in `Models/`).
+- `propel-ui/` hosts the Angular 21 SSR frontend (app code in `src/app/`, global styles in `src/styles.scss`).
+- Solution file: `propel-rental-core.sln` at the repo root.
+
+## Build, Test, and Development Commands
+Backend (from `Propel.Api/`):
+- `dotnet run` — run the API.
+- `dotnet watch` — run with hot reload.
+- `dotnet build` — compile the API.
+- `dotnet test` — run backend tests (if/when added).
+
+Frontend (from `propel-ui/`):
+- `npm start` — Angular dev server at `http://localhost:4200`.
+- `npm run build` — production build with SSR output in `dist/`.
+- `npm run serve:ssr:propel-ui` — serve the SSR build.
+- `npm test` — run Vitest via Angular CLI.
+
+## Coding Style & Naming Conventions
+- C#: prefer Minimal APIs (no controllers), records for DTOs, and primary constructors. Use `app.MapGet/MapPost/...` patterns.
+- Angular: standalone components only, `inject()` for DI, and `httpResource` + signals for data/state.
+- Indentation: 4 spaces for C#, 2 spaces for TypeScript/HTML/SCSS.
+- Formatting: Prettier config lives in `propel-ui/package.json` (single quotes, 100-char width).
+
+## Testing Guidelines
+- Frontend: `ng test` runs Vitest; keep specs alongside features (e.g., `src/app/app.spec.ts`).
+- Backend: no test project yet; when adding tests, wire them to `dotnet test` and keep them under a `Propel.Api.Tests/` or similar directory.
+
+## Commit & Pull Request Guidelines
+- Current history uses Conventional Commit-style prefixes like `feat:` and `initial:`; follow the same pattern (e.g., `feat:`, `fix:`, `chore:`).
+- PRs should include a concise description, key decisions, and any UI screenshots when visual changes are involved.
+
+## Security & Configuration Tips
+- App settings live in `Propel.Api/appsettings*.json`; avoid committing secrets.
+- Update API base URLs in the frontend service layer (`src/app/services/`) when environments differ.
+
+## Agent-Specific Instructions
+- See `CLAUDE.md` for architecture notes and do/don’t guidelines (Minimal APIs, zoneless Angular, no NgModules).

Propel.Api/Data/RentalDbContext.cs

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+using System.Diagnostics;
+
+namespace Propel.Api.Middleware;
+
+public sealed class CorrelationIdMiddleware(RequestDelegate next)
+{
+    public const string HeaderName = "X-Correlation-Id";
+
+    public async Task InvokeAsync(HttpContext context, ILogger<CorrelationIdMiddleware> logger)
+    {
+        var correlationId = context.Request.Headers[HeaderName].FirstOrDefault();
+        if (string.IsNullOrWhiteSpace(correlationId))
+        {
+            correlationId = Activity.Current?.TraceId.ToString() ?? Guid.NewGuid().ToString();
+        }
+
+        context.Response.Headers[HeaderName] = correlationId;
+
+        using (logger.BeginScope(new Dictionary<string, object> { ["CorrelationId"] = correlationId }))
+        {
+            await next(context);
+        }
+    }
+}

Propel.Api/Data/RentalDbSeeder.cs

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+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Propel.Api.Migrations;
+
+public partial class InitialCreate : Migration
+{
+    protected override void Up(MigrationBuilder migrationBuilder)
+    {
+        migrationBuilder.CreateTable(
+            name: "RentalItems",
+            columns: table => new
+            {
+                Id = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                Name = table.Column<string>(type: "nvarchar(200)", maxLength: 200, nullable: false),
+                Category = table.Column<string>(type: "nvarchar(max)", nullable: false),
+                DailyRate = table.Column<decimal>(type: "decimal(10,2)", nullable: false),
+                Status = table.Column<string>(type: "nvarchar(max)", nullable: false)
+            },
+            constraints: table =>
+            {
+                table.PrimaryKey("PK_RentalItems", x => x.Id);
+            });
+    }
+
+    protected override void Down(MigrationBuilder migrationBuilder)
+    {
+        migrationBuilder.DropTable(
+            name: "RentalItems");
+    }
+}

Propel.Api/Middleware/CorrelationIdMiddleware.cs

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+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Propel.Api.Modules.Inventory.Data;
+
+#nullable disable
+
+namespace Propel.Api.Migrations;
+
+[DbContext(typeof(RentalDbContext))]
+public partial class RentalDbContextModelSnapshot : ModelSnapshot
+{
+    protected override void BuildModel(ModelBuilder modelBuilder)
+    {
+        modelBuilder.HasAnnotation("ProductVersion", "10.0.0");
+
+        modelBuilder.Entity("Propel.Api.Modules.Inventory.Domain.RentalItem", b =>
+        {
+            b.Property<Guid>("Id")
+                .ValueGeneratedNever()
+                .HasColumnType("uniqueidentifier");
+
+            b.Property<string>("Category")
+                .IsRequired()
+                .HasColumnType("nvarchar(max)");
+
+            b.Property<decimal>("DailyRate")
+                .HasColumnType("decimal(10,2)");
+
+            b.Property<string>("Name")
+                .IsRequired()
+                .HasMaxLength(200)
+                .HasColumnType("nvarchar(200)");
+
+            b.Property<string>("Status")
+                .IsRequired()
+                .HasColumnType("nvarchar(max)");
+
+            b.HasKey("Id");
+
+            b.ToTable("RentalItems");
+        });
+    }
+}

Propel.Api/Migrations/20260123_InitialCreate.cs

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+namespace Propel.Api.Modules.AI;
+
+public static class ModuleInfo
+{
+    public const string Name = "AI";
+}

Propel.Api/Migrations/RentalDbContextModelSnapshot.cs

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+namespace Propel.Api.Modules.Audit;
+
+public static class ModuleInfo
+{
+    public const string Name = "Audit";
+}

Propel.Api/Models/Category.cs

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+namespace Propel.Api.Modules.Contracts;
+
+public static class ModuleInfo
+{
+    public const string Name = "Contracts";
+}