Unwrap fetch errors + show URL in Komodo probe result

The probe surfaced "unreachable: This operation was aborted" — technically
correct (an AbortController fired the fetch timeout) but useless for
diagnosing whether it's a wrong URL, blocked route, or firewall. Node's
fetch also hides real network causes (ECONNREFUSED, ENOTFOUND,
EHOSTUNREACH) under `.cause`, and the default message just says
"fetch failed".

describeFetchError() now unwraps AbortError to "timed out after 10000ms
dialing <url>" and pulls `.cause.code/.cause.message` for network
failures. KomodoPortResult gains a `url` field, always populated, so the
probe panel can surface the exact URL we dialed in a code block —
operators can then `curl` it from the container to confirm reachability.

komodoRestart benefits from the same unwrapping since it uses the same
komodoCall() transport.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/routes/servers/[name]/+page.svelte

@@ -16,6 +16,7 @@
         detail?: string;
         httpStatus?: number;
         snippet?: string;
+        url?: string;
     }
 
     interface Server {
@@ -212,6 +213,12 @@
                             {#if komodoProbe.httpStatus} · HTTP {komodoProbe.httpStatus}{/if}
                         </span>
                     </div>
+                    {#if komodoProbe.url}
+                        <div class="probe-url">
+                            <span class="k">tried</span>
+                            <code>{komodoProbe.url}</code>
+                        </div>
+                    {/if}
                     {#if komodoProbe.reason}
                         <div class="hint">{komodoFixHint(komodoProbe.reason, komodoProbe.httpStatus)}</div>
                     {/if}
@@ -505,6 +512,30 @@
     }
     .probe-detail strong { color: var(--spark-500); }
 
+    .probe-url {
+        display: flex;
+        align-items: baseline;
+        gap: 8px;
+        margin-top: 8px;
+        padding: 6px 12px;
+        background: var(--cherry-875);
+        border-radius: var(--r-sm);
+        border: 1px solid var(--cherry-700);
+        font-size: 11px;
+    }
+    .probe-url .k {
+        color: var(--ink-500);
+        font-family: var(--font-body);
+        font-size: 10px;
+        text-transform: uppercase;
+        letter-spacing: 1px;
+    }
+    .probe-url code {
+        color: var(--cream);
+        font-family: var(--font-mono);
+        word-break: break-all;
+    }
+
     .snippet-details {
         margin-top: 10px;
         font-family: var(--font-mono);