feat: use iframe to replace innerHTML

* fix: #1153 only success tool_call block in message with response

* fix: selectedVariantsMap cache

* feat: add init docs

* feat(acp): implement fs and terminal capabilities for full ACP support

- Add AcpCapabilities module for client capability declaration
- Implement AcpFsHandler for read_text_file and write_text_file
  with workspace boundary validation
- Implement AcpTerminalManager for PTY-based terminal execution
  with output buffering and lifecycle management
- Update acpProcessManager to wire fs/terminal handlers and
  advertise capabilities during initialization
- Register session workdirs for fs operation security checks

* feat(acp): add structured plan and mode update handling

- Improve plan updates with structured PlanEntry type
- Add status icons and formatted plan display
- Handle current_mode_update notifications
- Store plan entries and mode changes in MappedContent
- Add extra metadata to reasoning blocks for UI access

* test(acp): add unit tests for ACP capabilities, fs handler, and content mapper

- Add tests for buildClientCapabilities options
- Add comprehensive tests for AcpFsHandler:
  - Path validation and workspace boundary checks
  - Read with line offset and limit parameters
  - Write with directory creation
- Add tests for plan and mode update handling in content mapper:
  - Structured plan entries with status icons
  - Mode change notifications

* feat: add support acp plan

* fix: i18n

* fix: add i18n

* feat: add mode switcher

* chore: mode only show in agent conv

* fix: message tool parser and mode switch

* feat: mask env and inject env on init

* fix: code reviewer issues

* feat: add workspaceview for acp agent

* feat: support workspace dirs

* fix: workspace file refresh

* fix: tool call status

* fix: review refactor

* fix: keep last file list

* feat(acp-workspace): add file context actions

* fix(acp-workspace): move path helpers to preload

* fix(preload): allow empty relative path

* fix(preload): escape quotes when formatting paths