v1.5.0: Inline subagent panels, Bedrock compaction fixes, context window debug view

New features:
- Inline subagent panels with expand/collapse and click-to-toggle
- /context slash command to inspect bedrock_message_history
- Child-to-parent question routing with auto-answer for subagents
- Subagent token usage and cost merging into parent conversation
- Randomized session-colored user avatar silhouettes

Bug fixes:
- Bedrock: remove orphaned tool_results after compaction
- Bedrock: self-healing exchange lookup for out-of-order streaming
- Bedrock: append continuation prompt when conversation ends with assistant
- Duration sanity check rejects epoch-time artifacts from session restore
- Cache hit rate calculation uses actual total_input_tokens
- Hide "Time to first token" when value is zero

Improvements:
- Demote verbose bedrock-debug logs to debug/trace levels
- Bedrock tool usage counting falls back to action counting
- Remove logout menu item from workspace menu

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/ai/blocklist/controller/response_stream.rs

@@ -259,8 +259,8 @@ impl ResponseStream {
                 let event_type_name = match &response_event.r#type {
                     Some(warp_multi_agent_api::response_event::Type::Init(_)) => "Init",
                     Some(warp_multi_agent_api::response_event::Type::ClientActions(a)) => {
-                        log::info!(
-                            "[bedrock-debug] ResponseStream received ClientActions with {} actions",
+                        log::debug!(
+                            "[bedrock] ResponseStream received ClientActions with {} actions",
                             a.actions.len()
                         );
                         "ClientActions"