chore: prettier format all files, brotli, Sentry release tagging, CI gates

Prettier: auto-formatted 103 files to fix baseline. Prettier check in CI
  is now a hard gate (removed continue-on-error).

Brotli: installed libnginx-mod-http-brotli-filter/static. Enabled in nginx
  with brotli_static on for pre-compressed assets and comp_level 6.

Sentry releases: deploy script now exports VITE_APP_VERSION=<git-short-sha>
  before building so each Sentry release maps to an exact commit.
  CI also passes github.sha as VITE_APP_VERSION.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/pages/client/ClientLayout.tsx

@@ -21,14 +21,22 @@ export function ClientLayout({ nav, children }: ClientLayoutProps) {
           borderRadius: '0 0 4px 0',
           transition: 'top 0.1s',
         }}
-        onFocus={(e) => { (e.currentTarget as HTMLElement).style.top = '0'; }}
-        onBlur={(e) => { (e.currentTarget as HTMLElement).style.top = '-40px'; }}
+        onFocus={(e) => {
+          (e.currentTarget as HTMLElement).style.top = '0';
+        }}
+        onBlur={(e) => {
+          (e.currentTarget as HTMLElement).style.top = '-40px';
+        }}
       >
         Skip to main content
       </a>
       <Box grow="Yes">
-        <Box shrink="No" as="nav" aria-label="Room navigation">{nav}</Box>
-        <Box grow="Yes" as="main" id="main-content">{children}</Box>
+        <Box shrink="No" as="nav" aria-label="Room navigation">
+          {nav}
+        </Box>
+        <Box grow="Yes" as="main" id="main-content">
+          {children}
+        </Box>
       </Box>
     </>
   );