fix(ci): install binstall tools to CARGO_BIN so they're on PATH

cargo-binstall defaults to $CARGO_HOME/bin which is project-local
(.cache/cargo/bin), but ci.yml PATH only includes ~/.cargo/bin.
Use --install-path to put nextest and tauri-cli where cargo finds them.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: pythoninthegrass

taskfiles/ci.yml

@@ -89,16 +89,16 @@ tasks:
   _install-cargo-nextest:
     internal: true
     cmds:
-      - cargo binstall cargo-nextest --locked --no-confirm
+      - cargo binstall cargo-nextest --locked --no-confirm --install-path "{{.CARGO_BIN}}"
     status:
-      - command -v cargo-nextest
+      - test -x "{{.CARGO_BIN}}/cargo-nextest"
 
   _install-tauri-cli:
     internal: true
     cmds:
-      - cargo binstall tauri-cli --locked --no-confirm
+      - cargo binstall tauri-cli --locked --no-confirm --install-path "{{.CARGO_BIN}}"
     status:
-      - cargo tauri --version
+      - test -x "{{.CARGO_BIN}}/cargo-tauri"
 
   setup-system-deps:
     desc: "Install Linux system dependencies for Tauri"