Enhance PhotoTagger GUI and database to support comprehensive person information, including first, last, middle, and maiden names, along with date of birth. Implement smart validation for required fields and improve user experience with a visual calendar picker for date selection. Update README to reflect these changes and provide detailed guidance on new features and interface enhancements.

README.md

@@ -128,7 +128,7 @@ python3 photo_tagger.py auto-match --auto --show-faces
 
 **🎯 New GUI-Based Identification Features:**
 - 🖼️ **Visual Face Display** - See individual face crops in the GUI
-- 📝 **Separate Name Fields** - Dedicated "Last name" and "First name" input fields with dropdowns
+- 📝 **Separate Name Fields** - Dedicated text input fields for first name, last name, middle name, and maiden name
 - 🎯 **Smart Name Parsing** - Supports "Last, First" format that gets properly parsed and stored
 - ☑️ **Compare with Similar Faces** - Compare current face with similar unidentified faces
 - 🎨 **Modern Interface** - Clean, intuitive GUI with buttons and input fields
@@ -165,11 +165,16 @@ python3 photo_tagger.py modifyidentified
 This GUI lets you quickly review all identified people, rename them, and temporarily unmatch faces before committing.
 
 **Left Panel (People):**
-- 👥 **People List** - Shows all identified people with face counts in "Last, First" format
+- 👥 **People List** - Shows all identified people with face counts in full name format including middle names, maiden names, and birth dates
 - 🖱️ **Clickable Names** - Click to select a person (selected name is bold)
-- ✏️ **Edit Name Icon** - Rename a person with separate first/last name fields; tooltip shows "Update name"
-- 📝 **Separate Name Fields** - Edit with dedicated "Last name" and "First name" text boxes
-- 💡 **Help Text** - Small labels below text boxes showing "Last" and "First"
+- ✏️ **Edit Name Icon** - Comprehensive person editing with all fields; tooltip shows "Update name"
+- 📝 **Complete Person Fields** - Edit with dedicated fields for:
+  - **First Name** and **Last Name** (required)
+  - **Middle Name** and **Maiden Name** (optional)
+  - **Date of Birth** with visual calendar picker (required)
+- 💡 **Smart Validation** - Save button only enabled when all required fields are filled
+- 📅 **Calendar Integration** - Click 📅 button to open visual date picker
+- 🎨 **Enhanced Layout** - Organized grid layout with labels directly under each field
 
 **Right Panel (Faces):**
 - 🧩 **Person Faces** - Thumbnails of all faces identified as the selected person
@@ -184,13 +189,17 @@ This GUI lets you quickly review all identified people, rename them, and tempora
 **Performance Features:**
 - ⚡ **Optimized Database Access** - Loads all people data once when opening, saves only when needed
 - 🚫 **No Database Queries During Editing** - All editing operations use pre-loaded data
-- 💾 **Single Save Transaction** - Database updated only when clicking "Save changes"
+- 💾 **Immediate Person Saves** - Person information saved directly to database when clicking save
+- 🔄 **Real-time Validation** - Save button state updates instantly as you type
+- 📅 **Visual Calendar** - Professional date picker with month/year navigation
 
 Notes:
-- Changes are temporary until you click "Save changes" at the bottom.
-- Undo restores only the currently viewed person's faces.
-- Saving updates the database and refreshes counts.
-- Names are stored cleanly as separate first_name and last_name fields without commas.
+- **Person Information**: Saved immediately to database when clicking the 💾 save button in edit mode
+- **Face Unmatching**: Changes are temporary until you click "Save changes" at the bottom
+- **Validation**: Save button only enabled when first name, last name, and date of birth are all provided
+- **Calendar**: Date picker opens to existing date when editing, defaults to 25 years ago for new entries
+- **Undo**: Restores only the currently viewed person's unmatched faces
+- **Data Storage**: All person fields stored separately (first_name, last_name, middle_name, maiden_name, date_of_birth)
 
 ## 🧠 Advanced Algorithm Features
 
@@ -282,13 +291,15 @@ The tool uses SQLite database (`data/photos.db` by default) with these tables:
 
 ### Core Tables
 - **photos** - Photo file paths and processing status
-- **people** - Known people with separate first_name and last_name fields
+- **people** - Known people with separate first_name, last_name, and date_of_birth fields
 - **faces** - Face encodings, locations, and quality scores
 - **tags** - Custom tags for photos
 - **person_encodings** - Face encodings for each person (for matching)
 
 ### Database Schema Improvements
 - **Clean Name Storage** - People table uses separate `first_name` and `last_name` fields
+- **Date of Birth Integration** - People table includes `date_of_birth` column for complete identification
+- **Unique Constraint** - Prevents duplicate people with same name and birth date combination
 - **No Comma Issues** - Names are stored without commas, displayed as "Last, First" format
 - **Quality Scoring** - Faces table includes quality scores for better matching
 - **Optimized Queries** - Efficient indexing and query patterns for fast performance
@@ -413,7 +424,12 @@ When you run `python3 photo_tagger.py identify --show-faces`, you'll see:
 - ✅ **Identification Status** - Shows if face is already identified and by whom
 
 **Right Panel:**
-- 📝 **Person Name Dropdown** - Select from known people or type new names (pre-filled for re-identification)
+- 📝 **Person Name Fields** - Text input fields for:
+  - **First name** (required)
+  - **Last name** (required) 
+  - **Middle name** (optional)
+  - **Maiden name** (optional)
+- 📅 **Date of Birth** - Required date field with calendar picker (📅 button)
 - ☑️ **Compare Checkbox** - Compare with similar unidentified faces (persistent across navigation)
 - ☑️ **Select All/Clear All Buttons** - Bulk selection controls (enabled only when Compare is active)
 - 📜 **Similar Faces List** - Scrollable list of similar unidentified faces with:
@@ -421,10 +437,10 @@ When you run `python3 photo_tagger.py identify --show-faces`, you'll see:
   - 📈 **Confidence Percentages** - Color-coded match quality
   - 🖼️ **Face Images** - Thumbnail previews of similar faces
 - 🎮 **Control Buttons**:
-  - **✅ Identify** - Confirm the identification (saves immediately)
-  - **⬅️ Back** - Go back to previous face (shows image and status)
-  - **➡️ Next** - Move to next face
-  - **❌ Quit** - Exit application (all changes already saved)
+  - **✅ Identify** - Confirm the identification (saves immediately) - requires first name, last name, and date of birth
+  - **⬅️ Back** - Go back to previous face (shows image and status, repopulates fields)
+  - **➡️ Next** - Move to next face (clears date of birth, middle name, and maiden name fields)
+  - **❌ Quit** - Exit application (saves complete identifications only)
 
 ### Auto-Match GUI (Enhanced with Smart Algorithm)
 When you run `python3 photo_tagger.py auto-match --show-faces`, you'll see an improved interface with:
@@ -438,9 +454,12 @@ When you run `python3 photo_tagger.py auto-match --show-faces`, you'll see an im
 **Interface Layout:**
 
 **Left Panel:**
-- 👤 **Matched Person** - The already identified person
+- 👤 **Matched Person** - The already identified person with complete information
 - 🖼️ **Person Face Image** - Individual face crop of the matched person
-- 📁 **Photo Info** - Shows person name, photo filename, and face location
+- 📁 **Detailed Person Info** - Shows:
+  - **Full Name** with middle and maiden names (if available)
+  - **Date of Birth** (if available)
+  - **Photo filename** and face location
 - 💾 **Save Button** - "Save changes for [Person Name]" - saves all checkbox selections
 
 **Right Panel:**
@@ -462,7 +481,7 @@ The Compare feature in the Identify GUI works seamlessly with the main identific
 1. **Enable Compare**: Check "Compare with similar faces" to see similar unidentified faces
 2. **View Similar Faces**: Right panel shows all similar faces with confidence percentages and thumbnails
 3. **Select Faces**: Use individual checkboxes or Select All/Clear All buttons to choose faces
-4. **Enter Person Name**: Type or select the person's name in the dropdown
+4. **Enter Person Name**: Type the person's name in the text input fields
 5. **Identify Together**: Click Identify to identify the current face and all selected similar faces at once
 6. **Smart Navigation**: System warns if you try to navigate away with selected faces but no name
 7. **Quit Protection**: When closing, system offers to save any pending identifications
@@ -491,11 +510,29 @@ The auto-match feature now works in a **person-centric** way:
 - **Smart Tracking**: Previously identified faces are pre-selected for easy review
 - **Fast Performance**: Optimized database queries and streamlined interface
 
+### 📅 Calendar Interface Guide
+When you click the 📅 calendar button, you'll see:
+
+**Calendar Features:**
+- **Visual Grid Layout** - Traditional 7x7 calendar with clickable dates
+- **Month/Year Navigation** - Use << >> < > buttons to navigate
+- **Date Selection** - Click any date to select it
+- **Visual Feedback** - Selected dates highlighted in bright blue, today's date in orange
+- **Smart Pre-population** - Opens to existing date when editing previous identifications
+- **Smooth Operation** - Opens centered without flickering
+
+**Calendar Navigation:**
+- **<< >>** - Jump by year (limited to 1900-current year)
+- **< >** - Navigate by month
+- **Click Date** - Select any visible date
+- **Select Button** - Confirm your date choice
+- **Cancel Button** - Close without selecting
+
 ### GUI Tips
 - **Window Resizing**: Resize the window - it remembers your size preference
 - **Keyboard Shortcuts**: Press Enter in the name field to identify
 - **Back Navigation**: Use Back button to return to previous faces - images and identification status are preserved
-- **Re-identification**: Go back to any face and change the identification - the name field is pre-filled
+- **Re-identification**: Go back to any face and change the identification - all fields are pre-filled
 - **Auto-Save**: All identifications are saved immediately - no need to manually save
 - **Compare Mode**: Enable Compare checkbox to see similar unidentified faces - setting persists across navigation
 - **Bulk Selection**: Use Select All/Clear All buttons to quickly select or clear all similar faces
@@ -510,6 +547,8 @@ The auto-match feature now works in a **person-centric** way:
 - **Save Button Location**: Save button is in the left panel with the person's name for clarity
 - **Performance**: Similar faces load instantly thanks to pre-fetched data optimization
 - **Bidirectional Changes**: You can both identify and unidentify faces in the same session
+- **Field Requirements**: First name, last name, and date of birth must be filled to identify (middle name and maiden name are optional)
+- **Navigation Memory**: Date field clears on forward navigation, repopulates on back navigation
 - **Confidence Colors**: 
   - 🟢 80%+ = Very High (Almost Certain)
   - 🟡 70%+ = High (Likely Match)
@@ -587,6 +626,53 @@ This is now a minimal, focused tool. Key principles:
 
 ## 🆕 Recent Improvements (Latest Version)
 
+### 🔄 Field Navigation & Preservation Fixes (NEW!)
+- ✅ **Fixed Name Field Confusion** - First and last names now stay in correct fields during navigation
+- ✅ **Enhanced Data Storage** - Individual field tracking prevents name swapping issues
+- ✅ **Date of Birth Preservation** - Date of birth now preserved even when entered alone (without names)
+- ✅ **Consistent Field Handling** - All navigation (Next/Back) uses unified field management logic
+- ✅ **Smart Field Population** - Fields correctly repopulate based on original input context
+
+### 📅 Date of Birth Integration
+- ✅ **Required Date of Birth** - All face identifications now require date of birth
+- ✅ **Visual Calendar Picker** - Interactive calendar widget for easy date selection
+- ✅ **Smart Pre-population** - Calendar opens to existing date when editing
+- ✅ **Database Schema Update** - People table now includes date_of_birth column
+- ✅ **Unique Constraint** - Prevents duplicate people with same first name, last name, middle name, maiden name, and birth date
+- ✅ **Field Validation** - First name, last name, and date of birth required; middle name and maiden name optional
+- ✅ **Navigation Memory** - Date field clears on forward navigation, repopulates on back navigation
+
+### 🎨 Enhanced Calendar Interface
+- ✅ **Visual Calendar Grid** - Traditional 7x7 calendar layout with clickable dates
+- ✅ **Month/Year Navigation** - Easy navigation with << >> < > buttons
+- ✅ **Prominent Selection** - Selected dates highlighted in bright blue
+- ✅ **Today Highlighting** - Current date shown in orange when visible
+- ✅ **Smooth Positioning** - Calendar opens centered without flickering
+- ✅ **Isolated Styling** - Calendar styles don't affect other dialog buttons
+
+### 🔄 Smart Field Management
+- ✅ **Forward Navigation** - Date of birth, middle name, and maiden name fields clear when moving to next face
+- ✅ **Backward Navigation** - All fields repopulate with previously entered data
+
+### 🆕 Enhanced Person Information (LATEST!)
+- ✅ **Middle Name Field** - Optional middle name input field added to person identification
+- ✅ **Maiden Name Field** - Optional maiden name input field added to person identification
+- ✅ **Simplified Interface** - Removed dropdown functionality for cleaner, faster data entry
+- ✅ **Optimized Field Layout** - Date of birth positioned before maiden name for better workflow
+- ✅ **Enhanced Database Schema** - People table now includes middle_name and maiden_name columns
+- ✅ **Unique Constraint Update** - Prevents duplicate people with same combination of all five fields
+- ✅ **Streamlined Data Entry** - All name fields are now simple text inputs for faster typing
+
+### 🎨 Enhanced Modify Identified Interface (NEW!)
+- ✅ **Complete Person Information** - Shows full names with middle names, maiden names, and birth dates
+- ✅ **Comprehensive Editing** - Edit all person fields: first, last, middle, maiden names, and date of birth
+- ✅ **Visual Calendar Integration** - Professional date picker with month/year navigation
+- ✅ **Smart Validation** - Save button only enabled when all required fields (first name, last name, date of birth) are filled
+- ✅ **Real-time Feedback** - Button state updates instantly as you type or clear fields
+- ✅ **Enhanced Layout** - Organized grid layout with labels directly under each input field
+- ✅ **Immediate Database Saves** - Person information saved directly to database when clicking save
+- ✅ **Visual Button States** - Disabled save button clearly grayed out when validation fails
+
 ### Name Handling & Database
 - ✅ **Fixed Comma Issues** - Names are now stored cleanly without commas in database
 - ✅ **Separate Name Fields** - First name and last name are stored in separate database columns
@@ -606,7 +692,7 @@ This is now a minimal, focused tool. Key principles:
 
 ---
 
-**Total project size**: ~3,400 lines of Python code
+**Total project size**: ~3,800 lines of Python code
 **Dependencies**: 6 essential packages
 **Setup time**: ~5 minutes
 **Perfect for**: Batch processing personal photo collections with modern GUI interface