Squashed commit of the following:

commit d2ec8c0f07
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Thu May 15 15:42:33 2025 +0700

    add: db tx commit and rollback implementation

commit 264435f67e
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Thu May 15 14:34:20 2025 +0700

    fix: shortlink generation logic update/create

commit 047ab1937a
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Thu May 15 11:06:04 2025 +0700

    fix: if multiple studies patient, show first study by default

commit c13f834b92
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Thu May 15 09:46:32 2025 +0700

    add: register and login with DB query AND some struct type correction

commit dd4451c2a8
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Wed May 14 10:23:33 2025 +0700

    new file structure & koneksi ke DB

commit 8289881df3
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Tue May 13 16:49:07 2025 +0700

    edit: rm debug route

commit dd784da232
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Tue May 13 15:44:11 2025 +0700

    add: implement shortlink

commit 2687a761cc
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Tue May 13 11:47:19 2025 +0700

    add new dummy doctor user

commit eb67eaca46
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Tue May 13 11:46:28 2025 +0700

    add: ref_doctor studylist filter

commit 0d4825d152
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Tue May 13 10:07:16 2025 +0700

    edit study_iuids & accNum in patient jwt to array

commit 2d1f135fda
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Tue May 13 09:52:45 2025 +0700

    patient see their multiple studies

commit 13bb380f51
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Fri May 9 10:13:16 2025 +0700

    add: cors handler route and readme

commit 6c9ab574ce
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Mon May 5 11:50:36 2025 +0700

    add: login & token validation tapi belum connect ke DB

commit 297c9a6a01
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Mon Apr 28 15:37:02 2025 +0700

    add readme.md

commit 9b8e0260f3
Author: mario <dev.mario@sismedika@gmail.com>
Date:   Mon Apr 7 15:46:07 2025 +0700

    connected-to-google

commit f340bc5916
Author: mario <dev.mario@sismedika.com>
Date:   Mon Apr 7 11:14:18 2025 +0700

    init

internal/proxy/client.go

@@ -0,0 +1,113 @@
+package proxy
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+
+	"devone.aplikasi.web.id/gitea/mario/go-ohif-proxy/internal/auth"
+)
+
+// Client is responsible for making requests to the Healthcare API
+type Client struct {
+	googleAuth *auth.GoogleClient
+	projectID  string
+	location   string
+	dataset    string
+	dicomStore string
+}
+
+// NewClient creates a new Healthcare API client
+// Hanya menerima cfg.Google struct instead of all cfg.Config
+func NewClient(googleAuth *auth.GoogleClient, googleConfig struct {
+	ProjectID       string `mapstructure:"project_id"`
+	Location        string `mapstructure:"location"`
+	Dataset         string `mapstructure:"dataset"`
+	DicomStore      string `mapstructure:"dicom_store"`
+	CredentialsPath string `mapstructure:"credentials_path"`
+}) *Client {
+	return &Client{
+		googleAuth: googleAuth,
+		projectID:  googleConfig.ProjectID,
+		location:   googleConfig.Location,
+		dataset:    googleConfig.Dataset,
+		dicomStore: googleConfig.DicomStore,
+	}
+}
+
+// Response represents the HTTP response from the Healthcare API
+type Response struct {
+	StatusCode int
+	Headers    map[string]string
+	Body       []byte
+}
+
+// ForwardRequest forwards a request to Google Healthcare API
+func (c *Client) ForwardRequest(ctx context.Context, method, path string, headers map[string]string, body []byte) (*Response, error) {
+	token, err := c.googleAuth.GetAccessToken()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get access token: %w", err)
+	}
+
+	// Build URL - Simplified to exactly match OHIF's expected structure
+	baseURL := fmt.Sprintf("https://healthcare.googleapis.com/v1/projects/%s/locations/%s/datasets/%s/dicomStores/%s/dicomWeb",
+		c.projectID, c.location, c.dataset, c.dicomStore)
+
+	// Ensure path starts with /
+	if len(path) > 0 && path[0] != '/' {
+		path = "/" + path
+	}
+
+	fullURL := baseURL + path
+
+	// Log the full URL for debugging
+	fmt.Printf("Requesting URL: %s\n", fullURL)
+
+	// Create request
+	req, err := http.NewRequestWithContext(ctx, method, fullURL, bytes.NewReader(body))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	// Set headers
+	for k, v := range headers {
+		// Skip setting certain headers that might cause issues
+		if k == "Host" || k == "Content-Length" {
+			continue
+		}
+		req.Header.Set(k, v)
+	}
+
+	// Set auth header
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
+
+	// Make request
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("failed to execute request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	// Read response body
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response body: %w", err)
+	}
+
+	// Collect response headers
+	respHeaders := make(map[string]string)
+	for k, v := range resp.Header {
+		if len(v) > 0 {
+			respHeaders[k] = v[0]
+		}
+	}
+
+	return &Response{
+		StatusCode: resp.StatusCode,
+		Headers:    respHeaders,
+		Body:       respBody,
+	}, nil
+}