# Project Plan: Global Shift Fallback & Responsive Matrix

## Problem Diagnosis
1. **Fallback Logic Broken**: The matrix correctly parses overrides inside `employee_daily_shifts`, but defaults everything else to `RD` (Rest Day). If an employee has a default `shift_id` mapped directly on their internal profile, the engine ignores it. 
2. **Responsiveness**: Broad tables with 31 columns inevitably clash against CSS layouts if the overflow boundaries aren't properly constrained.

## Proposed Changes

### 1. Shift Engine Backend Refactor (`ShiftController.php`)
- **Eager Loading**: The `User` query will be updated to eagerly load `employee.shift`.
- **Inheritance Math**: Inject logic into the mapping loop:
  - If a specific date exists securely inside `employee_daily_shifts`, **USE IT**.
  - If NOT, check if `$user->employee->shift` exists securely. **USE IT**.
  - If BOTH fail, gracefully fall back to `RD` (Rest Day).

### 2. Frontend React Component Constraint (`calendar.tsx`)
- Enhance the structural UI table wrappers to use robust flexbox width boundaries (`w-full overflow-hidden` -> `min-w-full inline-block` or `table-layout: fixed` scrolling tricks).
- Prevent the "sticky" left column container from accidentally swallowing internal scrollbars on mobile viewports.

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> [!WARNING]  
> ## Socratic Gate / Clarifying Questions
> **1. Weekend Rest Days**: If an employee has a default `shift_id` (e.g., "Morning Shift"), should I apply this shift to ALL 7 DAYS of the week, or are there standard built-in Rest Days (like Saturday/Sunday) where it should forcibly fall back to `RD` instead?
> 
> **2. Table Behavior**: For responsiveness, do you want the rightward days to shrink to an absolute minimum standard width (e.g., `45px`), providing a smooth scroll across the month? Or do you want them structurally bound inside their container?

## Verification Checklist
- The table perfectly scrolls horizontally on narrow laptops securely.
- If Ana Regina has "Morning" set on her profile, standard days display `M` instead of `RD`.