feat(web): reflow the automation tasks header at narrow widths

The page header keeps the title at its natural width and moves the New action
onto another line once the two no longer fit, so a narrow content column never
splits the title across lines.

Register the new browser scenario in both web programs: the host aggregate owns
files that boot the host spine, and the client-registered app project excludes
them.

The scenario asserts the title stays on one line, the action separates when the
column narrows, and focus survives the change.

tsconfig.host.json

@@ -71,6 +71,7 @@
     "apps/web/tests/plugin-config.e2e.ts",
     "apps/web/tests/input-plugin-extensions.e2e.ts",
     "apps/web/tests/plugin-manager.e2e.ts",
+    "apps/web/tests/schedule-header.e2e.ts",
     "apps/web/tests/worktree-opt-in.e2e.ts",
     "apps/web/tests/session-inspector.e2e.ts",
     "apps/web/tests/shared-inspector.e2e.ts",