adds

.gitignore

@@ -0,0 +1,36 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+
+# Project specific binaries
+erp_system
+
+# SQLite
+*.db
+*.db-shm
+*.db-wal
+
+# OS Specific
+.DS_Store
+Thumbs.db
+
+# Editor/IDE specific
+.idea/
+.vscode/
+*.swp
+*~

AGENTS.md

@@ -0,0 +1,97 @@
+# ERP System Agent Guidelines
+
+This document provides instructions for coding agents working on the ERP System repository.
+
+## 1. Build, Lint, and Test
+
+### Build
+To build the application:
+```bash
+go build -o erp_system main.go
+```
+To run the application locally:
+```bash
+go run main.go
+```
+The server defaults to port `1337`.
+
+### Test
+Run all tests:
+```bash
+go test ./...
+```
+Run a specific test package:
+```bash
+go test ./internal/handlers/...
+```
+Run a single specific test function:
+```bash
+# Pattern: go test -v <package_path> -run <TestNameRegex>
+go test -v ./internal/handlers -run TestLoginSubmit
+```
+
+### Lint / Verify
+Run standard Go vetting:
+```bash
+go vet ./...
+```
+Format code (always run before committing):
+```bash
+go fmt ./...
+```
+
+## 2. Code Style & Conventions
+
+### General
+- **Language:** Go 1.25.6+
+- **Formatting:** Strictly adhere to `gofmt` standards.
+- **Naming:** 
+  - Use `PascalCase` for exported structs, fields, and functions.
+  - Use `camelCase` for unexported (private) identifiers.
+  - Keep variable names short but descriptive (e.g., `req` vs `r` is fine if context is clear, but `userRequest` is better for complex scopes).
+
+### Project Structure
+- `main.go`: Application entry point, router setup, dependency injection.
+- `internal/`: Private application code.
+  - `database/`: DB initialization and helpers.
+  - `handlers/`: HTTP handlers.
+  - `models/`: Data structs and business logic/DB queries.
+  - `middleware/`: HTTP middleware (Auth, etc.).
+- `templates/`: HTML templates (server-side rendered).
+
+### Imports
+Group imports into three blocks separated by a newline:
+1. Standard library (e.g., `"net/http"`, `"os"`)
+2. Third-party packages (e.g., `"github.com/gorilla/sessions"`)
+3. Internal project packages (e.g., `"erp_system/internal/models"`)
+
+Example:
+```go
+import (
+	"log"
+	"net/http"
+
+	"github.com/gorilla/sessions"
+
+	"erp_system/internal/models"
+)
+```
+
+### Error Handling
+- **Explicit Checks:** Always check errors. `if err != nil { ... }`.
+- **Handlers:** Use `http.Error(w, err.Error(), http.Status...)` to return errors to the client.
+- **Logging:** Log critical errors on the server side using `log.Printf` or similar before returning HTTP 500.
+
+### HTTP & Routing
+- Use Go's standard `net/http` `ServeMux` with Go 1.22+ routing patterns (e.g., `mux.Handle("GET /path/{id}", ...)`).
+- **HTMX:** The application uses HTMX.
+  - Check for `HX-Request` header to differentiate full page loads vs partials.
+  - Use `HX-Redirect` header for client-side redirection when handling HTMX requests.
+  - Render partial templates when appropriate.
+
+### Database
+- Use `internal/models` for all database interactions.
+- Pass the database connection (`*sql.DB`) or a wrapping struct to handlers via dependency injection (see `Handler` struct in `main.go`).
+
+## 3. Cursor / Copilot Rules
+(No specific Cursor or Copilot rules found in the repository yet. Adhere to the conventions above.)

templates/customers/form.html

@@ -14,9 +14,9 @@
     <div class="bg-white shadow sm:rounded-lg">
         <form class="space-y-6 p-6"
             {{if .IsNew}}
-                method="POST" action="/customers" hx-post="/customers"
+                method="POST" action="/customers" hx-post="/customers" hx-target="body"
             {{else}}
-                method="POST" action="/customers/{{.Customer.ID}}" hx-put="/customers/{{.Customer.ID}}"
+                method="POST" action="/customers/{{.Customer.ID}}" hx-put="/customers/{{.Customer.ID}}" hx-target="body"
             {{end}}>
 
             <div class="grid grid-cols-1 gap-6 sm:grid-cols-2">

templates/ledger/journal_entry_form.html

@@ -12,7 +12,7 @@
     {{end}}
 
     <div class="bg-white shadow sm:rounded-lg">
-        <form class="space-y-6 p-6" method="POST" action="/ledger/journal" hx-post="/ledger/journal" id="je-form">
+        <form class="space-y-6 p-6" method="POST" action="/ledger/journal" id="je-form">
             <div class="grid grid-cols-1 gap-6 sm:grid-cols-3">
                 <div>
                     <label for="entry_date" class="block text-sm font-medium text-gray-700">Date *</label>

templates/login.html

@@ -23,7 +23,7 @@
             </div>
             {{end}}
 
-            <form class="mt-8 space-y-6" method="POST" action="/login" hx-post="/login">
+            <form class="mt-8 space-y-6" method="POST" action="/login" hx-post="/login" hx-target="body">
                 <div class="space-y-4 rounded-md shadow-sm">
                     <div>
                         <label for="username" class="block text-sm font-medium text-gray-700">Username</label>

templates/orders/form.html

@@ -14,9 +14,9 @@
     <div class="bg-white shadow sm:rounded-lg">
         <form class="space-y-6 p-6"
             {{if .IsNew}}
-                method="POST" action="/orders" hx-post="/orders"
+                method="POST" action="/orders" hx-post="/orders" hx-target="body"
             {{else}}
-                method="POST" action="/orders/{{.Order.ID}}" hx-put="/orders/{{.Order.ID}}"
+                method="POST" action="/orders/{{.Order.ID}}" hx-put="/orders/{{.Order.ID}}" hx-target="body"
             {{end}}>
 
             <div class="grid grid-cols-1 gap-6 sm:grid-cols-2">