Initial commit: Happa Mission Plan v0.1.0

Task planning and path generation software for automated data collection
equipment (hyperspectral cameras, DSLR, depth cameras).

- Generate mission plans (JSON) with subtasks per device
- Generate scan path binary files (.RecordLine3)
- Multi-rectangle area planning with reference map support
- Device-specific FOV defaults (Pika L 17.6°, Pika NIR 21.7°, etc.)
- Timeline scheduling with constraint validation
- Tauri 2.x + Vue 3 + Naive UI + Pinia

src-tauri/src/io/json_writer.rs

@@ -0,0 +1,9 @@
+use std::path::Path;
+use crate::error::AppError;
+use crate::models::MissionPlan;
+
+pub fn write_mission(path: &Path, mission: &MissionPlan) -> Result<(), AppError> {
+    let content = serde_json::to_string_pretty(mission)?;
+    std::fs::write(path, content)?;
+    Ok(())
+}