Fix null handling for deliverables in create_template_for_owner (#51)

The previous code used `.unwrap_or_default()` which could produce
`Some(Value::Null)` if JSON serialization failed, leading to
inconsistent handling when the database returned NULL and sqlx
attempted to decode with the `#[sqlx(json)]` attribute on an Option type.

Changed to use `.ok()` which properly returns `None` when serialization
fails, ensuring consistent NULL handling between the application and
database layer.

Fixes: "Failed to create template: error occurred while decoding column
'deliverables': unexpected null; try decoding as an Option"

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/makima/src/db/repository.rs b/makima/src/db/repository.rs
index 9fc2c84..8c7ea23 100644
--- a/makima/src/db/repository.rs
+++ b/makima/src/db/repository.rs
@@ -2163,7 +2163,10 @@ pub async fn create_template_for_owner(
     .bind(&req.description)
     .bind(serde_json::to_value(&req.phases).unwrap_or_default())
     .bind(&req.default_phase)
-    .bind(req.deliverables.as_ref().map(|d| serde_json::to_value(d).unwrap_or_default()))
+    .bind(match &req.deliverables {
+        Some(d) => serde_json::to_value(d).ok(),
+        None => None,
+    })
     .fetch_one(pool)
     .await
 }