In src/main/java/com/example/HelloController.java around lines 72-73,
sendFileToBackend is a no-op causing attachments to be dropped; implement the
method to either perform the upload or queue the file with NtfyClient.
Specifically: validate the selectedFile exists and is readable, then either (A)
perform an HTTP multipart upload to the configured backend endpoint with proper
content-type and error handling, updating the UI on success/failure, or (B) if
using NtfyClient, call its publish/queue method with the file stream/bytes and
metadata, handle exceptions and update the UI accordingly; if no backend is
configured, disable the attach action or show a clear user-facing message so
attachments are not silently lost.

In src/main/java/com/example/HelloController.java around lines 82 to 85, the
code calls alert.showAndWait().get() directly which can throw if the Optional is
empty; replace this direct .get() usage with a safe Optional check such as using
alert.showAndWait().filter(ButtonType.OK::equals).isPresent() (or
alert.showAndWait().ifPresent(bt -> { if (bt == ButtonType.OK) { ... } })) and
only perform the stage lookup, println and stage.close() inside that guarded
branch.

In src/main/java/com/example/HelloFX.java around lines 27 to 29, remove the
commented-out FXMLLoader line at 28 and consolidate the window title so it is
set only once: choose the desired title (either "JavaFX Chat (ntfy)" or the
value used later at line 44), keep a single stage.setTitle(...) call with that
chosen string, and delete the other duplicate setTitle call (the one at line 44
or the one here) so the title is not applied twice.

In src/main/java/com/example/HelloFX.java around line 44, there is a duplicate
stage.setTitle call that resets the window title to "Hello MVC" after it was
already set to "JavaFX Chat (ntfy)" on line 29; remove the redundant
stage.setTitle("Hello MVC") (or alternatively remove the earlier one) so the
title is only set once and keep the desired string "JavaFX Chat (ntfy)".

In src/main/java/com/example/HelloModel.java around lines 3 to 4, the imports
for javafx.beans.property.SimpleStringProperty and
javafx.beans.property.StringProperty are unused and cause compilation errors;
remove these two import lines from the top of the file so only actually
referenced imports remain.

This will help determine if there's any indirect or configuration-based usage that wasn't caught by the initial search.

---

🏁 Script executed:

```shell
#!/bin/bash
# Broader search for any mention of "hotspot" in the codebase
rg -n "hotspot" --type java -i

# Search for any configuration or property files that might reference it
fd -e properties -e xml -e yml -e yaml -e config | xargs rg -l "hotspot" 2>/dev/null || true

# Search for reflection patterns that might load hotspot agent dynamically
rg -n "forName|loadClass|getRuntime.*exec" --type java -C2 | head -50

In src/main/java/module-info.java around lines 4 to 9, remove the unused module
requirement "requires jdk.hotspot.agent;" (line 7) because it is not referenced
anywhere in the codebase; update the module-info.java by deleting that requires
clause and ensure the remaining requires lines keep correct ordering/formatting
and the file compiles.

In src/main/resources/com/example/hello-view.fxml around lines 11 to 22, the
HBox currently mixes absolute positioning (layoutX/layoutY on the Attach button)
and contains the ListView which causes layout problems; move the ListView out of
the HBox into a parent VBox (ListView first, HBox of inputs below), remove
layoutX/layoutY from the Attach button, set VBox anchors (top/left/right/bottom)
and give the ListView VBox.vgrow="ALWAYS" and the messageField
HBox.hgrow="ALWAYS" so the chat list expands and the input row stays fixed;
ensure the Attach button only uses standard layout properties (no absolute
positioning).

In src/main/resources/com/example/hello-view.fxml around line 28, the ChoiceBox
element has layoutX="-162.0" which places it off-screen; either remove the
unused ChoiceBox node or update its layoutX to a non-negative value (e.g.,
appropriate container coordinates or bind it to layout constraints) and verify
prefWidth/prefHeight as needed so the control is visible and correctly
positioned in the scene.

In src/main/resources/com/example/hello-view2.fxml around lines 6 to 8, the FXML
is empty but is wired to com.example.HelloController2 which expects UI elements
(e.g., an @FXML Label named nameLabel); either add the required UI elements to
match the controller (for example add a Label with fx:id="nameLabel" positioned
appropriately) or remove the FXML file if it is unused and update any
references; ensure any added controls use matching fx:id values and import the
fx namespace so FXMLLoader can wire them to the controller.

In src/main/resources/style.css.fxml (lines 1-14) the filename wrongly includes
".css" for an FXML file and the FX controller is a placeholder; rename the file
to remove the ".css" (e.g., src/main/resources/style.fxml or a more descriptive
name) and update all references/loaders that point to the old filename, then
replace the fx:controller="CONTROLLER_NAME" with the real fully-qualified
controller class name (e.g., com.example.ui.YourController) in the FXML; if the
file is unused, delete it and remove any references instead.