fix: isolate tests — each test only operates on its own resources

- milestone.spec.ts: use unique prefix 'Milestone Test Project', target
  project card by name, clean up (delete) project after verification
- project-editor.spec.ts: use unique prefix 'ProjEditor Test', target
  project card by name instead of first .project-card match

This prevents cross-test interference where project-editor would
accidentally delete the project created by the milestone test.

tests/milestone.spec.ts

@@ -59,7 +59,7 @@ test.describe('Milestone Editor', () => {
     await page.waitForSelector('a:has-text("📁 Projects")', { timeout: 10000 });
     console.log('✅ Logged in');
 
-    // Step 2: Create Project
+    // Step 2: Create Project (unique name for this test)
     console.log('📁 Creating project...');
     await page.click('a:has-text("📁 Projects")');
     await page.waitForLoadState('networkidle');
@@ -68,7 +68,7 @@ test.describe('Milestone Editor', () => {
     await page.click('button:has-text("+ New")');
     await page.waitForSelector('input[placeholder="Project name"]', { timeout: 10000 });
     
-    const projectName = 'Test Project ' + Date.now();
+    const projectName = 'Milestone Test Project ' + Date.now();
     console.log('Creating project with name:', projectName);
     await page.fill('input[placeholder="Project name"]', projectName);
     await page.fill('input[placeholder="Description (optional)"]', 'Project for milestone testing');
@@ -76,12 +76,13 @@ test.describe('Milestone Editor', () => {
     await page.click('button:has-text("Create")');
     await page.waitForTimeout(2000);
     
-    await page.waitForSelector('.project-card', { timeout: 10000 });
+    // Wait for our specific project card to appear
+    await page.waitForSelector(`.project-card:has-text("${projectName}")`, { timeout: 10000 });
     console.log('✅ Project created');
 
-    // Step 3: Click on project to open it
+    // Step 3: Click on OUR project to open it
     console.log('👆 Opening project...');
-    await page.click('.project-card');
+    await page.click(`.project-card:has-text("${projectName}")`);
     await page.waitForLoadState('networkidle');
     await page.waitForTimeout(1500);
     console.log('✅ Project opened');
@@ -134,6 +135,30 @@ test.describe('Milestone Editor', () => {
     expect(hasMilestone).toBe(true);
     console.log('✅ Milestone verified in UI');
 
+    // Step 6: Cleanup — delete the project we created
+    console.log('🧹 Cleaning up — deleting project...');
+    await page.click('a:has-text("📁 Projects")');
+    await page.waitForLoadState('networkidle');
+    await page.waitForSelector(`.project-card:has-text("${projectName}")`, { timeout: 10000 });
+    await page.click(`.project-card:has-text("${projectName}")`);
+    await page.waitForLoadState('networkidle');
+    await page.waitForTimeout(1000);
+
+    const deleteBtn = page.locator('button:has-text("Delete")');
+    if (await deleteBtn.isVisible().catch(() => false)) {
+      page.on('dialog', async dialog => {
+        const match = dialog.message().match(/Type the project name "(.*)" to confirm/);
+        if (match) {
+          await dialog.accept(match[1]);
+        } else {
+          await dialog.accept();
+        }
+      });
+      await deleteBtn.click();
+      await page.waitForTimeout(2000);
+      console.log('✅ Project cleaned up');
+    }
+
     console.log('🎉 All milestone tests passed!');
   });
 });

tests/project-editor.spec.ts

@@ -44,7 +44,7 @@ test.describe('Project Editor', () => {
     
     console.log('✅ Logged in');
 
-    // Step 2: Create Project
+    // Step 2: Create Project (unique name for this test)
     console.log('📁 Creating project...');
     // Click Projects in sidebar
     await page.click('a:has-text("📁 Projects")');
@@ -60,8 +60,8 @@ test.describe('Project Editor', () => {
     // Wait for the form to appear (look for the project name input)
     await page.waitForSelector('input[placeholder="Project name"]', { timeout: 10000 });
     
-    // Fill project form
+    // Fill project form with a unique, identifiable name
-    const projectName = 'Test Project ' + Date.now();
+    const projectName = 'ProjEditor Test ' + Date.now();
     console.log('Creating project with name:', projectName);
     await page.fill('input[placeholder="Project name"]', projectName);
     await page.fill('input[placeholder="Description (optional)"]', 'Project for E2E testing');
@@ -72,23 +72,14 @@ test.describe('Project Editor', () => {
     // Wait a bit for submission
     await page.waitForTimeout(2000);
     
-    // Check if there are any errors in console
+    // Wait for our specific project card to appear
-    const errors = await page.evaluate(() => {
+    await page.waitForSelector(`.project-card:has-text("${projectName}")`, { timeout: 10000 });
-      return window.__errors || [];
-    });
-    if (errors.length > 0) {
-      console.log('Console errors:', errors);
-    }
-    
-    // Wait for project to be created (and appear in the grid) - check for any project card
-    await page.waitForSelector('.project-card', { timeout: 10000 });
     console.log('✅ Project created');
 
-    // Step 3: Delete the created project
+    // Step 3: Delete the created project — click OUR project card by name
     console.log('🗑️ Deleting project...');
     
-    // Click on the project card to open it
+    await page.click(`.project-card:has-text("${projectName}")`);
-    await page.click('.project-card');
     await page.waitForLoadState('networkidle');
     await page.waitForTimeout(1000);
     
@@ -98,7 +89,7 @@ test.describe('Project Editor', () => {
     console.log('Delete button visible:', deleteBtnVisible);
     
     if (deleteBtnVisible) {
-      // Set up prompt handler for the confirmation dialog - use dialog.defaultValue() to get the project name pattern
+      // Set up prompt handler for the confirmation dialog
       page.on('dialog', async dialog => {
         console.log('Dialog message:', dialog.message());
         // Extract project name from the message - format: "Type the project name "XXX" to confirm deletion:"