Update environment configuration and enhance user management features

- Changed VITE_SUPABASE_URL in .env.example for deployment consistency.
- Added new user management functionality to reset user passwords in UserManagement component.
- Updated supabase.ts to include first and last name fields in user profiles and added password reset functionality.
- Enhanced DashboardLayout to include a user profile view and improved user display in TopNavbar.
- Updated seed.sql to create additional users with roles for testing purposes.

database_schema.md

@@ -201,6 +201,57 @@ CREATE TABLE public.pecan_diameter_measurements (
 
 **Purpose**: Individual pecan diameter measurements (up to 10 per phase).
 
+### 3. Conductor Availability Management
+
+#### `public.conductor_availability`
+```sql
+CREATE TABLE public.conductor_availability (
+    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+    user_id UUID NOT NULL REFERENCES public.user_profiles(id) ON DELETE CASCADE,
+    available_from TIMESTAMP WITH TIME ZONE NOT NULL,
+    available_to TIMESTAMP WITH TIME ZONE NOT NULL,
+    notes TEXT, -- Optional notes about the availability
+    status TEXT NOT NULL DEFAULT 'active' CHECK (status IN ('active', 'cancelled')),
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    created_by UUID NOT NULL REFERENCES public.user_profiles(id),
+    
+    -- Ensure available_to is after available_from
+    CONSTRAINT valid_time_range CHECK (available_to > available_from),
+    
+    -- Ensure availability is in the future (can be modified if needed for past records)
+    CONSTRAINT future_availability CHECK (available_from >= NOW() - INTERVAL '1 day')
+);
+```
+
+**Purpose**: Stores conductor availability windows for experiment scheduling with overlap prevention.
+
+#### `public.experiment_phase_assignments`
+```sql
+CREATE TABLE public.experiment_phase_assignments (
+    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+    experiment_id UUID NOT NULL REFERENCES public.experiments(id) ON DELETE CASCADE,
+    repetition_id UUID NOT NULL REFERENCES public.experiment_repetitions(id) ON DELETE CASCADE,
+    conductor_id UUID NOT NULL REFERENCES public.user_profiles(id) ON DELETE CASCADE,
+    phase_name TEXT NOT NULL CHECK (phase_name IN ('pre-soaking', 'air-drying', 'cracking', 'shelling')),
+    scheduled_start_time TIMESTAMP WITH TIME ZONE NOT NULL,
+    scheduled_end_time TIMESTAMP WITH TIME ZONE NOT NULL,
+    status TEXT NOT NULL DEFAULT 'scheduled' CHECK (status IN ('scheduled', 'in-progress', 'completed', 'cancelled')),
+    notes TEXT, -- Optional notes about the assignment
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    created_by UUID NOT NULL REFERENCES public.user_profiles(id),
+    
+    -- Ensure scheduled_end_time is after scheduled_start_time
+    CONSTRAINT valid_scheduled_time_range CHECK (scheduled_end_time > scheduled_start_time),
+    
+    -- Ensure unique assignment per conductor per phase per repetition
+    CONSTRAINT unique_conductor_phase_assignment UNIQUE (repetition_id, conductor_id, phase_name)
+);
+```
+
+**Purpose**: Assigns conductors to specific experiment repetition phases with scheduled times for future scheduling functionality.
+
 ## Key Functions
 
 ### Authentication & Authorization
@@ -218,6 +269,12 @@ CREATE TABLE public.pecan_diameter_measurements (
 ### Data Validation
 - `validate_repetition_number()`: Ensures repetition numbers don't exceed experiment requirements
 - `public.check_repetition_lock_before_withdrawal()`: Prevents withdrawal of locked repetitions
+- `public.check_availability_overlap()`: Prevents overlapping availabilities for the same conductor
+- `public.adjust_overlapping_availability()`: Automatically adjusts overlapping availabilities (alternative approach)
+
+### Availability Management
+- `public.get_available_conductors(start_time, end_time)`: Returns conductors available for a specific time range
+- `public.is_conductor_available(conductor_id, start_time, end_time)`: Checks if a conductor is available for a specific time range
 
 ### Timestamp Management
 - `public.handle_updated_at()`: Updates the updated_at timestamp
@@ -227,7 +284,7 @@ CREATE TABLE public.pecan_diameter_measurements (
 
 ### Access Control Summary
 - **Admin**: Full access to all tables and operations
-- **Conductor**: Can manage experiments, experiment phases, and repetitions, view all data
+- **Conductor**: Can manage experiments, experiment phases, and repetitions, view all data, manage their own availability
 - **Analyst**: Read-only access to all data
 - **Data Recorder**: Can create and manage their own phase drafts and data
 
@@ -235,6 +292,8 @@ CREATE TABLE public.pecan_diameter_measurements (
 - All authenticated users can view experiments, experiment phases, and repetitions
 - Admin and conductor roles can manage experiment phases
 - Users can only modify their own phase drafts (unless admin)
+- Users can only manage their own availability (unless admin)
+- Conductors can view their own experiment phase assignments
 - Locked repetitions prevent draft modifications
 - Submitted drafts cannot be withdrawn if repetition is locked
 - Role-based access control for user management
@@ -260,6 +319,10 @@ The database includes comprehensive indexing for performance:
 - Only one submitted draft per user per phase per repetition
 - Moisture percentages must be between 0-100
 - Weights and measurements must be non-negative
+- Conductor availabilities cannot overlap for the same user
+- Availability windows must have valid time ranges (end > start)
+- Only one conductor assignment per phase per repetition
+- Scheduled times must have valid ranges (end > start)
 
 ## Migration History
 
@@ -271,5 +334,6 @@ The schema has evolved through several migrations:
 5. **Data Entry System**: Phase-specific draft and data management
 6. **Constraint Fixes**: Refined business rules and constraints
 7. **Experiment Phases**: Added experiment grouping for better organization
+8. **Conductor Availability**: Added availability management and experiment phase assignments for scheduling
 
 This schema supports a comprehensive pecan processing experiment management system with robust security, data integrity, and flexible role-based access control.