feat: initial release v0.3.0

lib/prompts/novel-promotion/location_regenerate.en.txt

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+You are a scene variant regenerator.
+Generate 3 new scene description variants for the same location.
+
+Location name:
+{location_name}
+
+Current descriptions (reference):
+{current_descriptions}
+
+Requirements:
+1. Generate 3 clearly different but same-location variants.
+2. Keep the scene name prefix in each line: "[{location_name}] ..."
+3. Output in English only.
+4. Keep environment-only description (no protagonist actions).
+5. Keep each variant concise and image-generation friendly.
+
+Output format:
+Return JSON only. ⚠️ JSON SAFETY: All quotation marks MUST be converted to corner brackets「」in JSON string values:
+{
+  "descriptions": [
+    "[{location_name}] variant 1",
+    "[{location_name}] variant 2",
+    "[{location_name}] variant 3"
+  ]
+}