fix(husky): stage server files from worktree root in pre-commit hook (#41835)

## Summary
- Pre-commit hook stages server files at the wrong path when committing
from a linked git worktree, creating an orphan tree at the worktree root
in addition to the correct entry.
- Root cause: git invokes hooks with `GIT_DIR` set but `GIT_WORK_TREE`
unset. After `pushd app/server`, `git add` falls back to treating cwd as
the worktree root, so `xargs git add appsmith-interfaces/...` (with the
`app/server/` prefix stripped) stages files at the wrong location. Only
affects worktrees, not the main checkout.
- Fix: run `mvn spotless:apply` in a subshell (so the script's cwd stays
at worktree root), and stage with full `app/server/...` paths via the
unchanged path list. Same behavior in the main checkout; correct
behavior in worktrees.

## Reproduction
In a linked worktree with a staged change under `app/server/`, the hook
stages the file twice — once correctly and once at the worktree root
without the `app/server/` prefix. Verified by simulating the hook env
(`GIT_DIR` set, cwd at `app/server/`) and running the old vs new `git
add` invocation; old path produces the duplicate orphan entry, new path
produces only the correct entry.

## Test plan
- [ ] Commit a server file change from a linked git worktree (`git
worktree add ...`); confirm `git status` after commit shows no orphan
entries at the worktree root.
- [ ] Commit a server file change from the main checkout; confirm
spotless still runs and re-staging works as before.
- [ ] Commit a client-only change; confirm `lint-staged` still runs.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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## Summary by CodeRabbit

* **Chores**
* Updated internal code formatting automation to improve developer
workflow efficiency.

---

**Note:** This release contains no user-facing changes. The update
addresses internal development tooling.

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Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

Author: wyattwalter

app/client/.husky/check-staged-files.sh

@@ -5,10 +5,14 @@ is_client_change=$(git diff --cached --name-only | grep -c "app/client")
 
 is_merge_commit=$(git rev-parse -q --verify MERGE_HEAD)
 
-# Function to apply Spotless and only commit staged files
+# Function to apply Spotless and only commit staged files.
+# Runs mvn in a subshell so we don't pushd the script's cwd into app/server.
+# Staging from the worktree root with full paths avoids a worktree-only bug:
+# git invokes hooks with GIT_DIR set but GIT_WORK_TREE unset, so `git add` from
+# a subdirectory treats cwd as the worktree root and stages files at the wrong path.
 apply_spotless_and_commit_staged_files() {
-  staged_server_files=$(git diff --cached --name-only | grep "app/server"| sed 's|app/server/||')
-  mvn spotless:apply
+  staged_server_files=$(git diff --cached --name-only | grep "app/server")
+  (cd app/server && mvn spotless:apply)
    # Check if Spotless succeeded
   if [ $? -ne 0 ]; then
     echo "Spotless apply failed, Please run mvn spotless:apply"
@@ -23,9 +27,7 @@ if [ "$is_merge_commit" ]; then
 else
   if [ "$is_server_change" -ge 1 ]; then
     echo "Applying Spotless to server files..."
-    pushd app/server > /dev/null
     apply_spotless_and_commit_staged_files
-    popd > /dev/null
   else
     echo "Skipping server side check..."
   fi