fix: unify theme system - fix theme switching persistence

- Unified localStorage key to 'theme-preference' across all components
- Fixed header.tsx using wrong localStorage key ('theme' instead of 'theme-preference')
- Added localStorage hybrid persistence for instant theme changes
- Removed router.refresh() which was causing stale data revert
- Replaced Blue theme with Sepia
- Consolidated auth() calls to prevent race conditions
- Updated UserSettingsData types to include all themes

keep-notes/test-results/.last-run.json

@@ -1,9 +1,4 @@
 {
   "status": "failed",
-  "failedTests": [
-    "0e82f3542f319872cf04-73b68b8bffd834564925",
-    "0e82f3542f319872cf04-17c5a515b5b4a118f4fd",
-    "0e82f3542f319872cf04-6e4edab6f3b634b94a35",
-    "0e82f3542f319872cf04-121a19ba6e7e01eeb977"
-  ]
+  "failedTests": []
 }

keep-notes/test-results/mobile-drag-scroll-Mobile--49569-600ms-before-drag-activates-chromium/error-context.md

@@ -1,33 +0,0 @@
-# Page snapshot
-
-```yaml
-- generic [active] [ref=e1]:
-  - main [ref=e4]:
-    - generic [ref=e7]:
-      - heading "Sign in to your account" [level=1] [ref=e8]
-      - generic [ref=e9]:
-        - generic [ref=e10]:
-          - generic [ref=e11]: Email
-          - textbox "Email" [ref=e13]:
-            - /placeholder: Enter your email address
-        - generic [ref=e14]:
-          - generic [ref=e15]: Password
-          - textbox "Password" [ref=e17]:
-            - /placeholder: Enter your password
-      - link "Forgot password?" [ref=e19] [cursor=pointer]:
-        - /url: /forgot-password
-      - button "Sign In" [ref=e20]
-  - region "Notifications alt+T"
-  - generic [ref=e26] [cursor=pointer]:
-    - button "Open Next.js Dev Tools" [ref=e27]:
-      - img [ref=e28]
-    - generic [ref=e31]:
-      - button "Open issues overlay" [ref=e32]:
-        - generic [ref=e33]:
-          - generic [ref=e34]: "0"
-          - generic [ref=e35]: "1"
-        - generic [ref=e36]: Issue
-      - button "Collapse issues badge" [ref=e37]:
-        - img [ref=e38]
-  - alert [ref=e40]
-```

keep-notes/test-results/mobile-drag-scroll-Mobile--941f3-ing-without-triggering-drag-chromium/error-context.md

@@ -1,33 +0,0 @@
-# Page snapshot
-
-```yaml
-- generic [active] [ref=e1]:
-  - main [ref=e4]:
-    - generic [ref=e7]:
-      - heading "Sign in to your account" [level=1] [ref=e8]
-      - generic [ref=e9]:
-        - generic [ref=e10]:
-          - generic [ref=e11]: Email
-          - textbox "Email" [ref=e13]:
-            - /placeholder: Enter your email address
-        - generic [ref=e14]:
-          - generic [ref=e15]: Password
-          - textbox "Password" [ref=e17]:
-            - /placeholder: Enter your password
-      - link "Forgot password?" [ref=e19] [cursor=pointer]:
-        - /url: /forgot-password
-      - button "Sign In" [ref=e20]
-  - region "Notifications alt+T"
-  - generic [ref=e26] [cursor=pointer]:
-    - button "Open Next.js Dev Tools" [ref=e27]:
-      - img [ref=e28]
-    - generic [ref=e31]:
-      - button "Open issues overlay" [ref=e32]:
-        - generic [ref=e33]:
-          - generic [ref=e34]: "0"
-          - generic [ref=e35]: "1"
-        - generic [ref=e36]: Issue
-      - button "Collapse issues badge" [ref=e37]:
-        - img [ref=e38]
-  - alert [ref=e40]
-```

keep-notes/test-results/mobile-drag-scroll-Mobile--af150-crolling-after-drag-attempt-chromium/error-context.md

@@ -1,33 +0,0 @@
-# Page snapshot
-
-```yaml
-- generic [active] [ref=e1]:
-  - main [ref=e4]:
-    - generic [ref=e7]:
-      - heading "Sign in to your account" [level=1] [ref=e8]
-      - generic [ref=e9]:
-        - generic [ref=e10]:
-          - generic [ref=e11]: Email
-          - textbox "Email" [ref=e13]:
-            - /placeholder: Enter your email address
-        - generic [ref=e14]:
-          - generic [ref=e15]: Password
-          - textbox "Password" [ref=e17]:
-            - /placeholder: Enter your password
-      - link "Forgot password?" [ref=e19] [cursor=pointer]:
-        - /url: /forgot-password
-      - button "Sign In" [ref=e20]
-  - region "Notifications alt+T"
-  - generic [ref=e26] [cursor=pointer]:
-    - button "Open Next.js Dev Tools" [ref=e27]:
-      - img [ref=e28]
-    - generic [ref=e31]:
-      - button "Open issues overlay" [ref=e32]:
-        - generic [ref=e33]:
-          - generic [ref=e34]: "0"
-          - generic [ref=e35]: "1"
-        - generic [ref=e36]: Issue
-      - button "Collapse issues badge" [ref=e37]:
-        - img [ref=e38]
-  - alert [ref=e40]
-```

keep-notes/test-results/mobile-drag-scroll-Mobile--f10f9-drag-after-600ms-long-press-chromium/error-context.md

@@ -1,33 +0,0 @@
-# Page snapshot
-
-```yaml
-- generic [active] [ref=e1]:
-  - main [ref=e4]:
-    - generic [ref=e7]:
-      - heading "Sign in to your account" [level=1] [ref=e8]
-      - generic [ref=e9]:
-        - generic [ref=e10]:
-          - generic [ref=e11]: Email
-          - textbox "Email" [ref=e13]:
-            - /placeholder: Enter your email address
-        - generic [ref=e14]:
-          - generic [ref=e15]: Password
-          - textbox "Password" [ref=e17]:
-            - /placeholder: Enter your password
-      - link "Forgot password?" [ref=e19] [cursor=pointer]:
-        - /url: /forgot-password
-      - button "Sign In" [ref=e20]
-  - region "Notifications alt+T"
-  - generic [ref=e26] [cursor=pointer]:
-    - button "Open Next.js Dev Tools" [ref=e27]:
-      - img [ref=e28]
-    - generic [ref=e31]:
-      - button "Open issues overlay" [ref=e32]:
-        - generic [ref=e33]:
-          - generic [ref=e34]: "0"
-          - generic [ref=e35]: "1"
-        - generic [ref=e36]: Issue
-      - button "Collapse issues badge" [ref=e37]:
-        - img [ref=e38]
-  - alert [ref=e40]
-```