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/terminal/input/slash_commands/mod.rs

@@ -698,6 +698,20 @@ impl Input {
                     ctx.dispatch_typed_action(&TerminalAction::ToggleUsageFooter);
                 }
             }
+            _context if command.name == commands::CONTEXT.name => {
+                let history = BlocklistAIHistoryModel::handle(ctx);
+                let conversation = history
+                    .as_ref(ctx)
+                    .active_conversation(self.terminal_view_id);
+                if conversation.is_none() {
+                    show_error_toast(
+                        "Cannot show context: no active conversation".to_owned(),
+                        ctx,
+                    );
+                } else {
+                    ctx.dispatch_typed_action(&TerminalAction::ToggleContextView);
+                }
+            }
             _fork if command.name == commands::FORK.name => {
                 let Some(conversation_id) = self
                     .ai_context_model