docs: archive simplify-frontend-ocr-config proposal

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2025-12-11 17:17:07 +08:00
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--- a/openspec/changes/archive/2025-12-11-simplify-frontend-ocr-config/proposal.md
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+# Change: 簡化前端 OCR 配置選項
+
+## Why
+OCR track 已改為使用 simple OCR 模式，不再需要前端的複雜配置選項（如表格偵測模式、OCR 預設、進階參數等）。這些配置增加了使用者的認知負擔，且不再影響實際處理結果。
+
+## What Changes
+- **BREAKING** 移除前端的 OCR 處理預設選擇器 (`OCRPresetSelector`)
+- **BREAKING** 移除前端的表格偵測配置選擇器 (`TableDetectionSelector`)
+- **BREAKING** 移除前端相關的 TypeScript 類型定義 (`OCRPreset`, `OCRConfig`, `TableDetectionConfig`, `TableParsingMode` 等)
+- 保留版面模型選擇功能 (`LayoutModelSelector`): `chinese | default | cdla`
+- 保留影像前處理配置功能 (`PreprocessingSettings`): auto/manual/disabled 模式及相關參數
+- 簡化後端 API 的 `ProcessingOptions`，移除不再使用的參數
+
+## Impact
+- Affected specs: `ocr-processing`
+- Affected code:
+  - **前端需刪除的檔案**:
+    - `frontend/src/components/OCRPresetSelector.tsx`
+    - `frontend/src/components/TableDetectionSelector.tsx`
+  - **前端需修改的檔案**:
+    - `frontend/src/types/apiV2.ts` - 移除未使用的類型定義
+    - `frontend/src/pages/ProcessingPage.tsx` - 移除已註解的相關 import 和邏輯
+  - **後端需修改的檔案**:
+    - `backend/app/schemas/task.py` - 移除 `ProcessingOptions` 中的 `ocr_preset`, `ocr_config`, `table_detection` 欄位
+    - `backend/app/routers/tasks.py` - 清理對應的參數處理邏輯
--- a/openspec/changes/archive/2025-12-11-simplify-frontend-ocr-config/specs/ocr-processing/spec.md
+++ b/openspec/changes/archive/2025-12-11-simplify-frontend-ocr-config/specs/ocr-processing/spec.md
@@ -0,0 +1,127 @@
+# ocr-processing Specification Delta
+
+## REMOVED Requirements
+
+### Requirement: OCR Preset Selection
+**Reason**: OCR track 已改為 simple OCR 模式，不再需要前端提供複雜的預設配置。後端統一使用預設參數處理。
+**Migration**: 移除前端 `OCRPresetSelector` 組件及相關類型定義。後端自動使用最佳預設配置。
+
+### Requirement: Table Detection Configuration
+**Reason**: 表格偵測設定（有框線/無框線表格開關、區域偵測開關）不再需要由前端控制。後端統一使用預設的表格偵測策略。
+**Migration**: 移除前端 `TableDetectionSelector` 組件及 `TableDetectionConfig` 類型。後端使用內建預設值。
+
+### Requirement: OCR Advanced Parameters
+**Reason**: 進階 OCR 參數（如 `table_parsing_mode`, `layout_threshold`, `enable_chart_recognition` 等）不再需要前端配置。
+**Migration**: 移除前端 `OCRConfig` 類型及相關 UI。後端固定使用 simple OCR 模式的預設參數。
+
+## MODIFIED Requirements
+
+### Requirement: Layout Model Selection
+The system SHALL allow users to select a layout detection model optimized for their document type, providing a simple choice between pre-configured models instead of manual parameter tuning.
+
+#### Scenario: User selects Chinese document model
+- **GIVEN** a user is processing Chinese business documents (forms, contracts, invoices)
+- **WHEN** the user selects "Chinese Document Model" (PP-DocLayout-S)
+- **THEN** the OCR engine SHALL use the PP-DocLayout-S layout detection model
+- **AND** the model SHALL be optimized for 23 Chinese document element types
+- **AND** table and form detection accuracy SHALL be improved over the default model
+
+#### Scenario: User selects standard model for English documents
+- **GIVEN** a user is processing English academic papers or reports
+- **WHEN** the user selects "Standard Model" (PubLayNet-based)
+- **THEN** the OCR engine SHALL use the default PubLayNet-based layout detection model
+- **AND** the model SHALL be optimized for English document layouts
+
+#### Scenario: User selects CDLA model for specialized Chinese layout
+- **GIVEN** a user is processing Chinese documents with complex layouts
+- **WHEN** the user selects "CDLA Model"
+- **THEN** the OCR engine SHALL use the picodet_lcnet_x1_0_fgd_layout_cdla model
+- **AND** the model SHALL provide specialized Chinese document layout analysis
+
+#### Scenario: Layout model is sent via API request
+- **GIVEN** a frontend application with model selection UI
+- **WHEN** the user starts task processing with a selected model
+- **THEN** the frontend SHALL send the model choice in the request body:
+  ```json
+  POST /api/v2/tasks/{task_id}/start
+  {
+    "use_dual_track": true,
+    "force_track": "ocr",
+    "language": "ch",
+    "layout_model": "chinese"
+  }
+  ```
+- **AND** the backend SHALL configure PP-StructureV3 with the corresponding model
+- **AND** the frontend SHALL NOT send `ocr_preset`, `ocr_config`, or `table_detection` parameters
+
+#### Scenario: Default model when not specified
+- **GIVEN** an API request without `layout_model` parameter
+- **WHEN** the task is started
+- **THEN** the system SHALL use "chinese" (PP-DocLayout-S) as the default model
+- **AND** processing SHALL work correctly without requiring model selection
+
+#### Scenario: Invalid model name is rejected
+- **GIVEN** a request with an invalid `layout_model` value
+- **WHEN** the user sends `layout_model: "invalid_model"`
+- **THEN** the API SHALL return 422 Validation Error
+- **AND** provide a clear error message listing valid model options
+
+### Requirement: Layout Model Selection UI
+The frontend SHALL provide a simple, user-friendly interface for selecting layout detection models with clear descriptions of each option.
+
+#### Scenario: Model options are displayed with descriptions
+- **GIVEN** the model selection UI is displayed
+- **WHEN** the user views the available options
+- **THEN** the UI SHALL show the following options:
+  - "Chinese Document Model (Recommended)" - for Chinese forms, contracts, invoices
+  - "Standard Model" - for English academic papers, reports
+  - "CDLA Model" - for specialized Chinese layout analysis
+- **AND** each option SHALL have a brief description of its use case
+
+#### Scenario: Chinese model is selected by default
+- **GIVEN** the user opens the task processing interface
+- **WHEN** the model selection is displayed
+- **THEN** "Chinese Document Model" SHALL be pre-selected as the default
+- **AND** the user MAY change the selection before starting processing
+
+#### Scenario: Model selection is visible only for OCR track
+- **GIVEN** a document processing interface
+- **WHEN** the user selects processing track
+- **THEN** layout model selection SHALL be shown ONLY when OCR track is selected or auto-detected
+- **AND** SHALL be hidden for Direct track (which does not use PP-StructureV3)
+
+#### Scenario: Simplified configuration options
+- **GIVEN** the OCR track processing interface
+- **WHEN** the user configures processing options
+- **THEN** the UI SHALL only show:
+  - Layout model selection (chinese/default/cdla)
+  - Image preprocessing settings (auto/manual/disabled)
+- **AND** SHALL NOT show:
+  - OCR preset selection
+  - Table detection configuration
+  - Advanced OCR parameters
+
+### Requirement: Simplified Processing Options API
+The backend API SHALL accept a simplified `ProcessingOptions` schema without complex OCR configuration parameters.
+
+#### Scenario: API accepts minimal configuration
+- **GIVEN** a start task API request
+- **WHEN** the request body contains:
+  ```json
+  {
+    "use_dual_track": true,
+    "force_track": "ocr",
+    "language": "ch",
+    "layout_model": "chinese",
+    "preprocessing_mode": "auto"
+  }
+  ```
+- **THEN** the API SHALL accept the request
+- **AND** process the task using backend default values for all other parameters
+
+#### Scenario: Legacy parameters are ignored
+- **GIVEN** a start task API request with legacy parameters
+- **WHEN** the request contains `ocr_preset`, `ocr_config`, or `table_detection`
+- **THEN** the API SHALL ignore these parameters
+- **AND** use backend default values instead
+- **AND** NOT return an error (backward compatibility)
--- a/openspec/changes/archive/2025-12-11-simplify-frontend-ocr-config/tasks.md
+++ b/openspec/changes/archive/2025-12-11-simplify-frontend-ocr-config/tasks.md
@@ -0,0 +1,51 @@
+# Tasks: 簡化前端 OCR 配置選項
+
+## 1. 前端清理
+
+### 1.1 移除未使用的組件
+- [x] 1.1.1 刪除 `frontend/src/components/OCRPresetSelector.tsx`
+- [x] 1.1.2 刪除 `frontend/src/components/TableDetectionSelector.tsx`
+
+### 1.2 清理 TypeScript 類型定義
+- [x] 1.2.1 從 `frontend/src/types/apiV2.ts` 移除以下類型:
+  - `TableDetectionConfig` (第 121-125 行)
+  - `OCRPreset` (第 131 行)
+  - `TableParsingMode` (第 140 行)
+  - `OCRConfig` (第 146-166 行)
+  - `OCRPresetInfo` (第 171-177 行)
+- [x] 1.2.2 從 `ProcessingOptions` interface 移除以下欄位:
+  - `table_detection`
+  - `ocr_preset`
+  - `ocr_config`
+
+### 1.3 清理 ProcessingPage
+- [x] 1.3.1 確認 `frontend/src/pages/ProcessingPage.tsx` 中沒有引用已移除的類型或組件
+- [x] 1.3.2 移除相關的註解說明（如果有）- 保留說明性註解
+
+## 2. 後端清理
+
+### 2.1 清理 Schema 定義
+- [x] 2.1.1 從 `backend/app/schemas/task.py` 移除未使用的 Enum 和 Model:
+  - `TableDetectionConfig`
+  - `OCRPresetEnum`
+  - `TableParsingModeEnum`
+  - `OCRConfig`
+  - `OCR_PRESET_CONFIGS`
+- [x] 2.1.2 從 `ProcessingOptions` 移除以下欄位:
+  - `table_detection`
+  - `ocr_preset`
+  - `ocr_config`
+
+### 2.2 清理 API 端點邏輯
+- [x] 2.2.1 檢查 `backend/app/routers/tasks.py` 中的 `start_task` 端點，移除對已刪除欄位的處理
+- [x] 2.2.2 更新 `process_task_ocr` 函數簽名和呼叫
+
+### 2.3 清理 Service 層
+- [x] 2.3.1 檢查 `backend/app/services/ocr_service.py`，確認沒有依賴已移除的配置項
+  - 注意：ocr_service.py 保留這些參數作為可選項，使用預設值處理。這是正確的設計，保持後端彈性。
+
+## 3. 驗證
+
+- [x] 3.1 確認 TypeScript 編譯無新錯誤（與本次變更相關的錯誤）
+- [ ] 3.2 確認後端 API 仍正常運作（需手動測試）
+- [ ] 3.3 測試上傳 -> 處理 -> 結果查看的完整流程（需手動測試）