feat: make repo URL optional when creating an app

Useful for git-push-only deploys where no external repo URL is needed.
- CreateApp.repo_url: String → Option<String>
- DB schema default: repo_url TEXT NOT NULL DEFAULT ''
- UI validation no longer requires the field
- Label marked (optional) in the form

https://claude.ai/code/session_01FKCW3FDjNFj6jve4niMFXH

server/src/db.rs

@@ -17,7 +17,7 @@ pub async fn migrate(pool: &DbPool) -> anyhow::Result<()> {
         r#"CREATE TABLE IF NOT EXISTS apps (
             id              TEXT PRIMARY KEY,
             name            TEXT NOT NULL UNIQUE,
-            repo_url        TEXT NOT NULL,
+            repo_url        TEXT NOT NULL DEFAULT '',
             branch          TEXT NOT NULL DEFAULT 'main',
             port            INTEGER NOT NULL,
             webhook_secret  TEXT NOT NULL,

server/src/models.rs

@@ -15,7 +15,7 @@ pub struct App {
 #[derive(Debug, Deserialize)]
 pub struct CreateApp {
     pub name: String,
-    pub repo_url: String,
+    pub repo_url: Option<String>,
     pub branch: Option<String>,
     pub port: i64,
 }

server/src/routes/apps.rs

@@ -36,7 +36,7 @@ pub async fn create(
     )
     .bind(&id)
     .bind(&payload.name)
-    .bind(&payload.repo_url)
+    .bind(payload.repo_url.unwrap_or_default())
     .bind(&branch)
     .bind(payload.port)
     .bind(&secret)

server/src/routes/ui.rs

@@ -241,7 +241,7 @@ pub async fn index(State(s): State<AppState>) -> Result<Html<String>, StatusCode
             <h2>Add App</h2>
             <div class="grid2" style="margin-bottom:12px">
                 <div><label>Name (slug)</label><input id="f-name" type="text" placeholder="my-api"></div>
-                <div><label>GitHub Repo URL</label><input id="f-repo" type="text" placeholder="https://github.com/you/repo.git"></div>
+                <div><label>GitHub Repo URL <span style="font-weight:normal;opacity:.6">(optional)</span></label><input id="f-repo" type="text" placeholder="https://github.com/you/repo.git"></div>
             </div>
             <div class="grid2" style="margin-bottom:16px">
                 <div><label>Branch</label><input id="f-branch" type="text" value="main"></div>
@@ -266,7 +266,7 @@ pub async fn index(State(s): State<AppState>) -> Result<Html<String>, StatusCode
                 branch:   document.getElementById('f-branch').value.trim() || 'main',
                 port:     parseInt(document.getElementById('f-port').value),
             }};
-            if (!data.name || !data.repo_url || !data.port) {{ alert('Fill in all fields'); return; }}
+            if (!data.name || !data.port) {{ alert('Fill in all fields'); return; }}
             const r = await fetch('/api/apps', {{
                 method: 'POST',
                 headers: {{'Content-Type': 'application/json'}},