feat(site-status-checker): add Live Site Preview webview for Site tab

A Scarf project dashboard that includes at least one webview widget
automatically exposes a Site tab next to the Dashboard tab. Adding a
"Live Site Preview" section with a webview widget gives this template
that tab out of the box.

The cron job + AGENTS.md now tell the agent to rewrite the webview's
`url` field to the first entry in `values.sites` on each run, so the
Site tab renders whatever the user actually configured instead of the
GitHub placeholder. If `values.sites` is empty, the webview URL is
left untouched.

Swift example test updated to assert 4 sections (was 3) plus the new
webview widget's presence + title; bundle + catalog rebuilt.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

templates/awizemann/site-status-checker/staging/AGENTS.md

@@ -56,6 +56,7 @@ The cron prompt Scarf registers for this project carries **absolute paths** (the
    - `Sites Down` stat widget: `value` = count of down results.
    - `Last Checked` stat widget: `value` = the ISO-8601 timestamp you just wrote.
    - `Watched Sites` list widget `items`: one entry per URL with `text` = URL and `status` = `"up"` or `"down"` (lowercase).
+   - `First Watched Site` **webview widget** (in the "Live Site Preview" section): set its `url` field to the **first** URL from `values.sites`. This is what the user sees rendered in the Scarf **Site** tab. If `values.sites` is empty, leave the webview's existing `url` alone.
 6. If the cron job has a `deliver` target set, emit a one-line summary (`3 up, 1 down — example.com timed out`) as the agent's final response so the delivery mechanism picks it up.
 
 ## What not to do

templates/awizemann/site-status-checker/staging/cron/jobs.json

@@ -2,6 +2,6 @@
   {
     "name": "Check site status",
     "schedule": "0 9 * * *",
-    "prompt": "Run the site status check for the Scarf project at {{PROJECT_DIR}}. Read {{PROJECT_DIR}}/.scarf/config.json to get `values.sites` (the URL list) and `values.timeout_seconds` (the per-URL HTTP timeout). HTTP GET each URL with that timeout, following up to 3 redirects; treat 2xx/3xx as up and anything else (including timeouts and DNS failures) as down. Prepend a new timestamped results section to {{PROJECT_DIR}}/status-log.md — create the file with a one-line header if it doesn't exist yet. Update {{PROJECT_DIR}}/.scarf/dashboard.json: set the Sites Up / Sites Down / Last Checked stat widgets' `value` fields, and replace the 'Watched Sites' list widget's `items` array with one entry per URL (text = URL, status = \"up\" or \"down\"). Preserve every other field in dashboard.json as-is. Reply with a one-line summary like '3 up, 1 down — example.com timed out'."
+    "prompt": "Run the site status check for the Scarf project at {{PROJECT_DIR}}. Read {{PROJECT_DIR}}/.scarf/config.json to get `values.sites` (the URL list) and `values.timeout_seconds` (the per-URL HTTP timeout). HTTP GET each URL with that timeout, following up to 3 redirects; treat 2xx/3xx as up and anything else (including timeouts and DNS failures) as down. Prepend a new timestamped results section to {{PROJECT_DIR}}/status-log.md — create the file with a one-line header if it doesn't exist yet. Update {{PROJECT_DIR}}/.scarf/dashboard.json: set the Sites Up / Sites Down / Last Checked stat widgets' `value` fields; replace the 'Watched Sites' list widget's `items` array with one entry per URL (text = URL, status = \"up\" or \"down\"); and if `values.sites` is non-empty, set the 'First Watched Site' webview widget's `url` field to the FIRST URL from `values.sites` (otherwise leave the webview's existing url alone). Preserve every other field in dashboard.json as-is. Reply with a one-line summary like '3 up, 1 down — example.com timed out'."
   }
 ]

templates/awizemann/site-status-checker/staging/dashboard.json

@@ -1,7 +1,7 @@
 {
   "version": 1,
   "title": "Site Status",
-  "description": "Daily uptime check for your watched URLs. The stat widgets and the sites list populate after the first cron run; before that, the list mirrors what the agent last wrote.",
+  "description": "Daily uptime check for your watched URLs. The stat widgets, the sites list, and the Site tab's preview URL all update automatically when the cron job runs. Switch to the Site tab to see your first watched site live.",
   "theme": { "accent": "green" },
   "sections": [
     {
@@ -47,6 +47,18 @@
         }
       ]
     },
+    {
+      "title": "Live Site Preview",
+      "columns": 1,
+      "widgets": [
+        {
+          "type": "webview",
+          "title": "First Watched Site",
+          "url": "https://github.com/awizemann/scarf/tree/main/templates/awizemann/site-status-checker",
+          "height": 420
+        }
+      ]
+    },
     {
       "title": "How to Use",
       "columns": 1,
@@ -55,7 +67,7 @@
           "type": "text",
           "title": "Quick Start",
           "format": "markdown",
-          "content": "**1.** Review your configuration — click the **slider icon** (top-right of this dashboard) to open Configuration. The sites you enter there are what the cron job will check.\n\n**2.** Enable the `[tmpl:awizemann/site-status-checker] Check site status` cron job in the Cron sidebar. It ships paused — nothing runs until you say so.\n\n**3.** Ask your agent: *\"Run the site status check now.\"* The Watched Sites list populates, the stat widgets update, and a new entry lands at the top of `status-log.md`.\n\n**4.** Daily at 9 AM the cron job fires automatically. Change the schedule in the Cron sidebar if you want a different cadence.\n\nSee `README.md` and `AGENTS.md` in the project root for the full spec."
+          "content": "**1.** Review your configuration — click the **slider icon** (top-right of this dashboard) to open Configuration. The sites you enter there are what the cron job will check.\n\n**2.** Enable the `[tmpl:awizemann/site-status-checker] Check site status` cron job in the Cron sidebar. It ships paused — nothing runs until you say so.\n\n**3.** Ask your agent: *\"Run the site status check now.\"* The Watched Sites list populates, the stat widgets update, the Site tab's URL switches to your first watched site, and a new entry lands at the top of `status-log.md`.\n\n**4.** Daily at 9 AM the cron job fires automatically. Change the schedule in the Cron sidebar if you want a different cadence.\n\nSwitch to the **Site** tab (next to Dashboard, above) to see your first watched site rendered in a browser. Useful to eyeball a site when the status says up but something still looks off.\n\nSee `README.md` and `AGENTS.md` in the project root for the full spec."
         }
       ]
     }