Update field handling guidelines and version to alpha2

- Enhanced Date/Time Handling with null/sentinel date logic (1900-01-01)
- Added 'See Notes' display for sentinel dates with related note fields
- Documented date entry normalization and validation rules
- Added Boolean Field Handling guidelines
- Added Calculated Fields documentation (Active, Due_Date_Counter)
- Added Due_Date_ASAP field specification for urgent job tracking
- Added Pending Schema Updates section
- Version bump to 1.0.0-alpha2

.cursorrules

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+# Project Rules for AI Assistants
+
+This file contains project-specific guidance for AI assistants working on the Job-List application.
+
+## Field Handling Guidelines
+
+### Date/Time Handling
+
+**Storage Format (PocketBase Database):**
+- All date/time fields must be stored as **ISO 8601 UTC format**
+- Example: `2025-12-21T18:30:00.000Z`
+- **Null dates**: Use sentinel value `1900-01-01T00:00:00.000Z` to represent null/empty dates
+
+**Display Format (Frontend/UI):**
+- Timezone: **US Central Standard Time (CST/CDT)**
+- Time: **12-hour format** with am/pm (e.g., `6:30 pm`)
+- Date: **Short US format** MM/dd/yyyy (e.g., `12/21/2025`)
+
+**Null/Empty Date Display:**
+- Sentinel date (1900-01-01) with **no related note field** → display as **empty/blank** field
+- Sentinel date (1900-01-01) with **related note field populated** → display **"See Notes"**
+  - Example: If `Due_Date` is sentinel and `Due_Date_Notes` has content, show "See Notes"
+- Empty frontend field → store as sentinel date (1900-01-01) in PocketBase
+
+**Date Entry and Normalization:**
+- Dates can be entered via **datepicker** (preferred) or **manual text entry**
+- Manual entries must be normalized to full MM/dd/yyyy format:
+  - `1/1` → `01/01/2026` (add year based on logical context)
+  - `12/1` → `12/01/2025` (use current year if month hasn't passed)
+- **Confirmation required** for manual entries: Show prompt "Did you mean MM/dd/yyyy?" before saving
+- **Reject invalid dates** with error message explaining:
+  - Invalid format or date that doesn't fit normalization logic
+  - Suggest using related note field for explanations (e.g., `Due_Date_Notes` for `Due_Date`)
+- **Validation**: Only allow valid dates OR completely empty - no partial/invalid entries
+
+**Conversion Rules (Bidirectional):**
+- **Frontend → Backend**: Convert user input from CST → ISO UTC before saving to PocketBase
+- **Backend → Frontend**: Convert PocketBase UTC data → CST for display (or "See Notes" for sentinel with notes)
+- **Updates**: Any date/time change from either frontend or backend must trigger conversion and sync to maintain consistency across the application
+
+### Boolean Field Handling
+
+**Storage Format (PocketBase Database):**
+- Stored as boolean values: `true` or `false`
+- `null` values must be converted to `false`
+
+**Display Format (Frontend/UI):**
+- Rendered as checkboxes
+- Checked = `true`
+- Unchecked = `false`
+
+**Conversion Rules (Bidirectional):**
+- **Frontend → Backend**: Checkbox state (checked/unchecked) → boolean (`true`/`false`) → stored in PocketBase
+- **Backend → Frontend**: PocketBase boolean value → checkbox state (checked/unchecked)
+- **Updates**: Any change to checkbox state or boolean value must sync bidirectionally to maintain consistency
+
+### Calculated Fields
+
+#### Active Field (Boolean - Read-Only)
+
+**Trigger:**
+- Automatically calculated when `Job_Status` field changes on the frontend
+
+**Calculation Logic:**
+- `Active` = `true` if `Job_Status` equals any of:
+  - "Estimating"
+  - "Est Sent"
+  - "Est Hold"
+  - "Follow Up"
+  - "Awarded"
+  - "In Progress"
+  - "Billed In Progress"
+- `Active` = `false` for all other `Job_Status` values
+
+**Frontend Behavior:**
+- Display as **read-only** (checkbox or indicator)
+- Automatically recalculate whenever `Job_Status` changes
+- Sync calculated value to PocketBase after update
+
+#### Due_Date_Counter Field (Text - Read-Only)
+
+**Trigger:**
+- Automatically calculated when `Due_Date` or `Due_Date_ASAP` field changes on the frontend
+- Does NOT recalculate on `Job_Status` changes
+
+**Calculation Logic:**
+1. If `Job_Status` ≠ "Estimating" → **"N/A"**
+2. If `Due_Date_ASAP` = true → **"ASAP"**
+3. If `Due_Date` is blank/sentinel (1900-01-01) → **blank/empty**
+4. If `Due_Date` < Today → **"Passed due"**
+5. If `Due_Date` = Today → **"Due today"**
+6. Else → Calculate days remaining: **"[X] day"** (singular) or **"[X] days"** (plural)
+
+**Frontend Behavior:**
+- Display as **read-only text field**
+- Automatically recalculate whenever `Due_Date` or `Due_Date_ASAP` changes
+- Sync calculated value to PocketBase after update
+
+#### Due_Date_ASAP Field (Boolean)
+
+**Purpose:**
+- Mark jobs as urgent/ASAP with timestamp tracking
+
+**Behavior When Checked:**
+- System automatically sets `Due_Date` to **TODAY's date** (system-generated timestamp)
+- `Due_Date` field displays **"ASAP"**
+- `Due_Date_Counter` displays **"ASAP"**
+- Enables tracking: Days since ASAP was marked using the captured date
+
+**Behavior When Unchecked:**
+- `Due_Date` reverts to blank/sentinel (1900-01-01) or allows manual date entry
+- Normal date display and counter calculation resume
+
+**Design Rationale:**
+- **ASAP scenario**: Captures specific timestamp for urgent items requiring immediate attention
+- **Blank/No Due Date scenario**: Uses sentinel (1900-01-01) + `created_date` for flexible/TBD timing
+- Key difference: ASAP provides explicit urgency tracking vs. general aging for non-urgent items
+
+## Pending Schema Updates
+
+**Fields to Add:**
+- `Due_Date_Notes` (text field) - Explanatory notes for Due_Date
+- `Start_Date_Notes` (text field) - Explanatory notes for Start_Date
+- `Due_Date_ASAP` (boolean) - Flag for marking jobs as urgent/ASAP with timestamp tracking
+
+**Action Items:**
+- Review current schema against planned fields
+- Identify any other date fields that need corresponding note fields
+- Implement field additions in PocketBase
+- Update frontend forms and display logic
+- Update Due_Date_Counter calculation logic to incorporate Due_Date_ASAP field