feat(plugin-honcho): show what Honcho remembers about you

The opt-in page gains a debug panel, once the user's saved flag is on:
service status (reachability, latency, the caller's own processing
queue, with the specific Honcho error when something is wrong), a full
overview (peer card, derived facts with ids, summary) and one text
field with two actions — search (raw ranked facts) and ask (Honcho's
server-side LLM answers), plus an in-page mini-guide.

Every endpoint gates on the per-user opt-in server-side, fail closed,
and derives the peer from the authenticated Caller — never from the
request body — since the workspace is shared. Honcho 404s are
translated per-endpoint as 'no memory yet' rather than failures.

crates/plugin-honcho/src/lib.rs

@@ -764,10 +764,11 @@ pub struct HonchoPlugin {
     handle:        Mutex<Option<JoinHandle<()>>>,
     /// Shared Memory implementation — created once, updated on start/stop.
     honcho_memory: Arc<HonchoMemory>,
-    /// Deps the HTTP router (config/opt-in pages + `POST /admin/test`) needs at
-    /// request time. Handed to the router once at boot as a shared cell; `start`
-    /// fills it and `stop` clears it, so handlers resolve the current wiring and
-    /// answer 503 while the plugin is enabled but not running.
+    /// Deps the HTTP router (config/opt-in pages, `POST /admin/test`, and the
+    /// opt-in-gated introspection endpoints) needs at request time. Handed to
+    /// the router once at boot as a shared cell; `start` fills it and `stop`
+    /// clears it, so handlers resolve the current wiring and answer 503 while
+    /// the plugin is enabled but not running.
     web:           WebCell,
 }
 
@@ -920,10 +921,14 @@ impl core_api::plugin::Plugin for HonchoPlugin {
         let workspace_id = cfg.workspace_id.clone();
         let user_config  = Arc::clone(&ctx.user_config);
 
-        // Wire the HTTP router (config/opt-in pages + admin test endpoint).
+        // Wire the HTTP router (config/opt-in pages + the admin test and the
+        // opt-in-gated introspection endpoints).
         *self.web.lock().await = Some(HonchoWeb {
             user_channel: Arc::clone(&ctx.user_channel),
             i18n:         Arc::clone(&ctx.i18n),
+            client:       Arc::clone(&client),
+            workspace_id: workspace_id.clone(),
+            user_config:  Arc::clone(&user_config),
         });
 
         self.honcho_memory.activate(Arc::clone(&client), workspace_id.clone(), Arc::clone(&user_config));