fix(fish-speech): resolve relocated source

The editable install records the backend build path, which does not exist after LocalAI relocates the packaged backend. Add the runtime source directory to PYTHONPATH so inference modules remain importable.

Assisted-by: Codex:gpt-5

Author: localai-org-maint-bot

backend/python/fish-speech/Makefile

@@ -1,10 +1,13 @@
-.PHONY: fish-speech test-source-preparation
-fish-speech: test-source-preparation
+.PHONY: fish-speech test-source-preparation test-runtime-import
+fish-speech: test-source-preparation test-runtime-import
 	bash install.sh
 
 test-source-preparation:
 	bash prepare-source_test.sh
 
+test-runtime-import:
+	bash run_test.sh
+
 .PHONY: run
 run: fish-speech
 	@echo "Running fish-speech..."

backend/python/fish-speech/run.sh

@@ -1,9 +1,11 @@
 #!/bin/bash
-backend_dir=$(dirname $0)
+backend_dir=$(dirname "$(realpath "$0")")
 if [ -d $backend_dir/common ]; then
     source $backend_dir/common/libbackend.sh
 else
     source $backend_dir/../common/libbackend.sh
 fi
 
+export PYTHONPATH="${backend_dir}/fish-speech-src${PYTHONPATH:+:${PYTHONPATH}}"
+
 startBackend $@

backend/python/fish-speech/run_test.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -euo pipefail
+
+SCRIPT_DIR=$(dirname "$(realpath "$0")")
+WORK_DIR=$(mktemp -d)
+trap 'rm -rf "$WORK_DIR"' EXIT
+
+mkdir -p "$WORK_DIR/runtime/common" "$WORK_DIR/runtime/fish-speech-src/fish_speech"
+cp "$SCRIPT_DIR/run.sh" "$WORK_DIR/runtime/run.sh"
+
+cat > "$WORK_DIR/runtime/fish-speech-src/fish_speech/inference_engine.py" <<'PY'
+IMPORT_OK = True
+PY
+
+cat > "$WORK_DIR/runtime/common/libbackend.sh" <<'SH'
+startBackend() {
+    python3 -c 'from fish_speech.inference_engine import IMPORT_OK; assert IMPORT_OK'
+}
+SH
+
+bash "$WORK_DIR/runtime/run.sh"
+
+echo "PASS: runtime launcher imports relocated fish-speech source"