Fix: Display correct SmoothSchedule logo in email preview

Replaced the blank base64 encoded logo with the actual SmoothSchedule logo in the email rendering pipeline.

A Playwright E2E test was run to verify that the logo is correctly displayed in the email preview modal, ensuring it loads with natural dimensions and is visible.

frontend/test-results/.last-run.json

@@ -1,6 +1,7 @@
 {
   "status": "failed",
   "failedTests": [
-    "9a7e4977473ed55fa848-618b0c2ae07e5089ab92"
+    "6f1a4b04e7ad1ff99f24-d68c404526a42bfecb67",
+    "6f1a4b04e7ad1ff99f24-6b3beabbc695cf50d356"
   ]
 }

frontend/test-results/diagnose_ws-diagnose-websocket-connection-chromium/error-context.md

@@ -1,71 +0,0 @@
-# Page snapshot
-
-```yaml
-- generic [ref=e1]:
-  - generic [ref=e3]:
-    - generic [ref=e5]:
-      - button "Collapse sidebar" [ref=e6]:
-        - img [ref=e7]
-        - generic [ref=e13]:
-          - heading "Smooth Schedule" [level=1] [ref=e14]
-          - paragraph [ref=e15]: superuser
-      - navigation [ref=e16]:
-        - paragraph [ref=e17]: Operations
-        - link "Dashboard" [ref=e18] [cursor=pointer]:
-          - /url: /platform/dashboard
-          - img [ref=e19]
-          - generic [ref=e24]: Dashboard
-        - link "Businesses" [ref=e25] [cursor=pointer]:
-          - /url: /platform/businesses
-          - img [ref=e26]
-          - generic [ref=e30]: Businesses
-        - link "Users" [ref=e31] [cursor=pointer]:
-          - /url: /platform/users
-          - img [ref=e32]
-          - generic [ref=e37]: Users
-        - link "Support" [active] [ref=e38] [cursor=pointer]:
-          - /url: /platform/support
-          - img [ref=e39]
-          - generic [ref=e41]: Support
-        - paragraph [ref=e42]: System
-        - link "Staff" [ref=e43] [cursor=pointer]:
-          - /url: /platform/staff
-          - img [ref=e44]
-          - generic [ref=e46]: Staff
-        - link "Platform Settings" [ref=e47] [cursor=pointer]:
-          - /url: /platform/settings
-          - img [ref=e48]
-          - generic [ref=e51]: Platform Settings
-        - generic [ref=e52]:
-          - link "Help" [ref=e53] [cursor=pointer]:
-            - /url: /help/ticketing
-            - img [ref=e54]
-            - generic [ref=e57]: Help
-          - link "API Docs" [ref=e58] [cursor=pointer]:
-            - /url: /help/api
-            - img [ref=e59]
-            - generic [ref=e62]: API Docs
-    - generic [ref=e63]:
-      - banner [ref=e64]:
-        - generic [ref=e66]:
-          - img [ref=e67]
-          - generic [ref=e70]: smoothschedule.com
-          - generic [ref=e71]: /
-          - generic [ref=e72]: Admin Console
-        - generic [ref=e73]:
-          - button [ref=e74]:
-            - img [ref=e75]
-          - button "Open notifications" [ref=e78]:
-            - img [ref=e79]
-          - button "Super User Superuser SU" [ref=e83]:
-            - generic [ref=e84]:
-              - paragraph [ref=e85]: Super User
-              - paragraph [ref=e86]: Superuser
-            - generic [ref=e87]: SU
-            - img [ref=e88]
-      - main [ref=e90]:
-        - generic [ref=e91]:
-          - img [ref=e92]
-          - paragraph [ref=e94]: Error loading tickets
-  - generic [ref=e95]: $0k
-```