- Add undoStack/redoStack refs with pushHistory/handleUndo/handleRedo
- Replace execCmd('undo')/execCmd('redo') with custom stack handlers
- Call pushHistory before structural changes (delete, insert field/table/image, formatting)
- Add onMouseDown preventDefault to toolbar and field library buttons to stop focus loss
- Implement saveSelection/restoreSelection using savedRangeRef
- Bind onBlur/onMouseUp/onKeyUp on editor to persist cursor position
- Restore selection in insertSmartField and insertImage before insertHTML
- Update experience record (#20)
- Replace direct DOM remove() with Range+execCommand('delete') in TemplateManage click and keydown handlers to restore undo stack
- Append ​ zero-width space to smart-field-wrapper HTML in insertSmartField and defaultContent.ts to prevent unwanted line breaks
- Refactor ReportEditor surgeonSignature rendering to depend on isSigned field
- Add isSigned to DEFAULT_FORM_FIELDS (single_select: 已签字/未签字)
- Change surgeonSignature to visibleInForm=true, isSystemLocked=false
- Constrain signature image with max-width:120px, max-height:40px, object-fit:contain in CSS and print.ts
- Add weak-blocking signature validation prompts in saveReport('completed')
- Update experience record (#19)
- Add signature?: string to User type and 'signature' to FieldType
- Add surgeonSignature field to DEFAULT_FORM_FIELDS (category: 图片)
- UserManage: add canvas-based image compression (max 500px) and signature upload UI
- TemplateManage: add hover highlight on field buttons via direct DOM style manipulation
- TemplateManage: add '图片' category to field library for surgeonSignature insertion
- ReportEditor: auto-fill surgeonSignature with currentUser.signature image or placeholder text
- index.css & print.ts: add .report-signature-img styling (height 2.4em, vertical-align middle)
- Update experience record (#18)
- Move delete-btn to top-right of smart-field-wrapper via absolute positioning
- Add template-editor-mode class to TemplateManage editor for CSS isolation
- Show delete-btn only on hover/focus-within inside template-editor-mode
- Add .field-value:focus highlight with background darken and blue glow
- Sync defaultContent.ts smartField() HTML structure
- Fix ReportEditor multi_select .map crash with Array.isArray guard
- TemplateManage: add uniqueness check for smart fields to prevent duplicate inserts
- Add red circular delete button to smart-field-wrapper (visible on hover via CSS)
- Enhance keydown handler to delete smart fields at block-level boundaries
- Update defaultContent.ts smartField() to include delete-btn
- ReportManage: add per-row checkboxes, select-all, bulk delete
- Add single-report export modal (PDF via printDocument, JSON via Blob)
- Add bulk export actions for PDF and JSON
- Update experience record (#16)
- Compress insertSmartField HTML to single-line, remove trailing
- Compress smartField helper in defaultContent.ts to single-line
- Add white-space: nowrap to .smart-field-wrapper (CSS + inline)
- Add keydown interceptor in TemplateManage to prevent Backspace/Delete
from removing whole <p> when adjacent to smart-field-wrapper
- Update experience record (#14)
