#11010: fix(control-ui): hide tool call cards when thinking toggle is off

## Problem When the thinking/reasoning toggle is off in the Control UI, tool call cards (exec, edit, read, sessions_history, etc.) still appear in the chat view. These cards show only the tool name and "Completed" status, cluttering the conversation without providing meaningful information to the user. **Screenshot showing the issue:** Tool cards like `exec`, `edit`, `sessions_history` appear inline even when thinking is toggled off, taking up space without adding value. ## Solution This PR hides tool call cards when `showReasoning` is false: 1. **Standalone tool result cards** — Returns `nothing` instead of rendering tool cards when `showReasoning` is false (in `grouped-render.ts`) 2. **Inline tool cards** — Skips rendering tool cards within assistant message bubbles when `showReasoning` is false 3. **Pure tool-call assistant messages** — Filters out assistant messages that contain only `tool_call`/`thinking` blocks (extends the existing `toolResult` filter, related to #10985 / #10996) ## Changes - `ui/src/ui/chat/grouped-render.ts` — Conditionally render tool cards based on `showReasoning` - `ui/src/ui/views/chat.ts` — Filter assistant messages with only tool call/thinking content blocks ## Testing 1. Open Control UI chat 2. Toggle thinking/reasoning **off** 3. Verify tool call cards no longer appear in the conversation 4. Toggle thinking **on** 5. Verify tool call cards appear as before Related: #10985, #10996 <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> - Updates Control UI chat rendering to hide tool call/result cards when the thinking/reasoning toggle is disabled. - `grouped-render.ts` now returns `nothing` for standalone tool-result-only bubbles and skips inline tool card rendering unless `showReasoning` is true. - `chat.ts` extends message filtering to drop assistant messages whose content is only tool-call and/or thinking blocks when `showThinking` is false. <h3>Confidence Score: 3/5</h3> - This PR is likely safe to merge, but the new filtering may miss some tool-only message variants and leave the original clutter in certain provider/message formats. - The rendering changes are small and gated by `showReasoning`, but the assistant-message filter relies on a narrow allowlist of block `type` strings; if other tool block variants are emitted, they won’t be filtered, undermining the intended behavior. - ui/src/ui/views/chat.ts <!-- greptile_other_comments_section --> _{(5/5) You can turn off certain types of comments like style [here](https://app.greptile.com/review/github)!} <!-- /greptile_comment -->