Add /dashboard route, mark-all-watched on complete, keyboard fixes

- Move dashboard page to app/(pages)/dashboard, redirect / to /dashboard
  for authenticated users, update all nav/breadcrumb/auth hrefs
- Mark all episodes watched when a TV show status is set to "completed"
  (markAllEpisodesWatched skips already-watched episodes)
- Refactor KeyboardProvider to store shortcuts in a ref instead of
  state, eliminating unnecessary re-renders; use react-hotkeys-hook for
  Cmd+K so it works reliably in form inputs
- Fix useRegisterShortcut: re-register on every render (stable ref read)
  with a separate cleanup effect, removing brittle key memoization
- Search page: silently navigate to title detail on import instead of
  showing "Added to library" toast

pnpm-lock.yaml

@@ -53,6 +53,9 @@ importers:
       react-dom:
         specifier: 19.2.4
         version: 19.2.4(react@19.2.4)
+      react-hotkeys-hook:
+        specifier: ^5.2.4
+        version: 5.2.4(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
       react-resizable-panels:
         specifier: ^4.6.5
         version: 4.6.5(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
@@ -2741,6 +2744,12 @@ packages:
     peerDependencies:
       react: ^19.2.4
 
+  react-hotkeys-hook@5.2.4:
+    resolution: {integrity: sha512-BgKg+A1+TawkYluh5Bo4cTmcgMN5L29uhJbDUQdHwPX+qgXRjIPYU5kIDHyxnAwCkCBiu9V5OpB2mpyeluVF2A==}
+    peerDependencies:
+      react: '>=16.8.0'
+      react-dom: '>=16.8.0'
+
   react-is@16.13.1:
     resolution: {integrity: sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==}
 
@@ -5425,6 +5434,11 @@ snapshots:
       react: 19.2.4
       scheduler: 0.27.0
 
+  react-hotkeys-hook@5.2.4(react-dom@19.2.4(react@19.2.4))(react@19.2.4):
+    dependencies:
+      react: 19.2.4
+      react-dom: 19.2.4(react@19.2.4)
+
   react-is@16.13.1: {}
 
   react-is@18.3.1: {}