feat(web): add follow-up suggestion chips and ghost text (#1156)

* feat(web): add follow-up suggestion chips and ghost text to chat UI

The LLM now always generates 1-3 follow-up command suggestions via
<suggestions> tags in its response. These are extracted server-side,
broadcast as SSE events, and rendered as clickable chips above the
chat input. The first suggestion also appears as ghost text in the
input field (Tab to accept). Includes debug logging for LLM responses
in the agentic loop and removes noisy NEAR AI status logging.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

* fix: resolve deferred review items from PR #1156 [skip-regression-check]

- Remove literal backslashes from raw string prompt (reasoning.rs)
- Make WASM channels skip Suggestions status (no-op instead of empty callback)
- Add !e.shiftKey guard to Tab-to-accept ghost text handler
- Cap extracted suggestions at 3 and trim whitespace-only entries
- Extract suggestions in approval-resume path (prevents tag leaking)
- Remove stale .has-ghost class during showSuggestionChips reset

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <[email protected]>

src/agent/thread_ops.rs

@@ -420,6 +420,10 @@ impl Agent {
         // Complete, fail, or request approval
         match result {
             Ok(AgenticLoopResult::Response(response)) => {
+                // Extract <suggestions> from response text before user sees it
+                let (response, suggestions) =
+                    crate::agent::dispatcher::extract_suggestions(&response);
+
                 // Hook: TransformResponse — allow hooks to modify or reject the final response
                 let response = {
                     let event = crate::hooks::HookEvent::ResponseTransform {
@@ -473,6 +477,18 @@ impl Agent {
                 )
                 .await;
 
+                // Send suggestions after response (best-effort, rendered by web gateway)
+                if !suggestions.is_empty() {
+                    let _ = self
+                        .channels
+                        .send_status(
+                            &message.channel,
+                            StatusUpdate::Suggestions { suggestions },
+                            &message.metadata,
+                        )
+                        .await;
+                }
+
                 Ok(SubmissionResult::response(response))
             }
             Ok(AgenticLoopResult::NeedApproval { pending }) => {
@@ -1334,6 +1350,8 @@ impl Agent {
 
             match result {
                 Ok(AgenticLoopResult::Response(response)) => {
+                    let (response, suggestions) =
+                        crate::agent::dispatcher::extract_suggestions(&response);
                     thread.complete_turn(&response);
                     let (turn_number, tool_calls) = thread
                         .turns
@@ -1364,6 +1382,16 @@ impl Agent {
                             &message.metadata,
                         )
                         .await;
+                    if !suggestions.is_empty() {
+                        let _ = self
+                            .channels
+                            .send_status(
+                                &message.channel,
+                                StatusUpdate::Suggestions { suggestions },
+                                &message.metadata,
+                            )
+                            .await;
+                    }
                     Ok(SubmissionResult::response(response))
                 }
                 Ok(AgenticLoopResult::NeedApproval {