fix: e2e tests need to click 'Continue to Booking' before date selection

The exchange page is a two-step wizard:
- Step 1: Direction, amount, price selection
- Step 2: Date and slot selection

Tests were looking for date elements before navigating to step 2.

frontend/app/generated/api.ts

@@ -332,7 +332,7 @@ export interface paths {
          *
          *     The response includes:
          *     - market_price: The raw price from the exchange
-         *     - agreed_price: The price with admin premium applied
+         *     - premium_percentage: The premium to apply to trades
          *     - is_stale: Whether the price is older than 5 minutes
          *     - config: Trading configuration (min/max EUR, increment)
          */
@@ -541,6 +541,29 @@ export interface paths {
         patch?: never;
         trace?: never;
     };
+    "/api/admin/users/search": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        /**
+         * Search Users
+         * @description Search users by email for autocomplete.
+         *
+         *     Returns users whose email contains the search query (case-insensitive).
+         *     Limited to 10 results for autocomplete purposes.
+         */
+        get: operations["search_users_api_admin_users_search_get"];
+        put?: never;
+        post?: never;
+        delete?: never;
+        options?: never;
+        head?: never;
+        patch?: never;
+        trace?: never;
+    };
 }
 export type webhooks = Record<string, never>;
 export interface components {
@@ -884,13 +907,14 @@ export interface components {
         };
         /**
          * PriceResponse
-         * @description Current BTC/EUR price with premium applied.
+         * @description Current BTC/EUR price for trading.
+         *
+         *     Note: The actual agreed price depends on trade direction (buy/sell)
+         *     and is calculated by the frontend using market_price and premium_percentage.
          */
         PriceResponse: {
             /** Market Price */
             market_price: number;
-            /** Agreed Price */
-            agreed_price: number;
             /** Premium Percentage */
             premium_percentage: number;
             /**
@@ -1023,6 +1047,16 @@ export interface components {
             /** Permissions */
             permissions: string[];
         };
+        /**
+         * UserSearchResult
+         * @description Result item for user search.
+         */
+        UserSearchResult: {
+            /** Id */
+            id: number;
+            /** Email */
+            email: string;
+        };
         /** ValidationError */
         ValidationError: {
             /** Location */
@@ -1815,4 +1849,36 @@ export interface operations {
             };
         };
     };
+    search_users_api_admin_users_search_get: {
+        parameters: {
+            query: {
+                /** @description Search query for user email */
+                q: string;
+            };
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        requestBody?: never;
+        responses: {
+            /** @description Successful Response */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["UserSearchResult"][];
+                };
+            };
+            /** @description Validation Error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["HTTPValidationError"];
+                };
+            };
+        };
+    };
 }

frontend/e2e/exchange.spec.ts

@@ -92,9 +92,13 @@ test.describe("Exchange Page - Regular User Access", () => {
     await expect(page.getByText(/You buy €\d/)).toBeVisible();
   });
 
-  test("exchange page shows date selection", async ({ page }) => {
+  test("exchange page shows date selection after continue", async ({ page }) => {
     await page.goto("/exchange");
 
+    // Step 1: Click "Continue to Booking" to proceed to step 2
+    await page.getByRole("button", { name: "Continue to Booking" }).click();
+
+    // Step 2: Now date selection should be visible
     await expect(page.getByRole("heading", { name: "Select a Date" })).toBeVisible();
     // Should see multiple date buttons
     const dateButtons = page
@@ -118,7 +122,10 @@ test.describe("Exchange Page - With Availability", () => {
   test("shows available slots when availability is set", async ({ page }) => {
     await page.goto("/exchange");
 
-    // Use data-testid for reliable date selection
+    // Step 1: Click "Continue to Booking" to proceed to step 2
+    await page.getByRole("button", { name: "Continue to Booking" }).click();
+
+    // Step 2: Use data-testid for reliable date selection
     const tomorrowStr = getTomorrowDateStr();
     const dateButton = page.getByTestId(`date-${tomorrowStr}`);
     await expect(dateButton).toBeEnabled({ timeout: 15000 });
@@ -138,7 +145,10 @@ test.describe("Exchange Page - With Availability", () => {
   test("clicking slot shows confirmation form", async ({ page }) => {
     await page.goto("/exchange");
 
-    // Use data-testid for reliable date selection
+    // Step 1: Click "Continue to Booking" to proceed to step 2
+    await page.getByRole("button", { name: "Continue to Booking" }).click();
+
+    // Step 2: Use data-testid for reliable date selection
     const tomorrowStr = getTomorrowDateStr();
     const dateButton = page.getByTestId(`date-${tomorrowStr}`);
     await expect(dateButton).toBeEnabled({ timeout: 15000 });
@@ -160,7 +170,10 @@ test.describe("Exchange Page - With Availability", () => {
   test("confirmation shows trade details", async ({ page }) => {
     await page.goto("/exchange");
 
-    // Use data-testid for reliable date selection
+    // Step 1: Click "Continue to Booking" to proceed to step 2
+    await page.getByRole("button", { name: "Continue to Booking" }).click();
+
+    // Step 2: Use data-testid for reliable date selection
     const tomorrowStr = getTomorrowDateStr();
     const dateButton = page.getByTestId(`date-${tomorrowStr}`);
     await expect(dateButton).toBeEnabled({ timeout: 15000 });