- The authentication route in the API has been updated to use a new router setup function.
- Comments have been added to all exported members of the `auth.go` module in the internal controllers package.

This commit refactors the `main.go` file in the API directory, as well as the related models in the `models.go` file. The changes include:

- Reordering imports and removing unnecessary imports
- Fixing error messages to be more descriptive
- Handling database connections more efficiently with deferred closures
- Handling errors and returning appropriate error responses
- Adding proper JSON bindings for POST requests
- Adding new views in the database scripts for aggregated statistics and daily user statistics

No changes were made to imports and requires.

Add logging to the API to keep track of specific requests and headers. Also added CORS middleware to handle OPTIONS requests.

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The commit adds logging functionality to the API and includes a middleware function to handle CORS OPTIONS requests. This will allow us to track specific requests and headers received by the API.

[API/main.go](/api/main.go):
- Added import for the 'log' package
- Added logging statements to print the request headers and "_I am here_" message
- Removed unnecessary newlines and comments

[fe/src/app.css](/fe/src/app.css):
- Added a new style for button hover effects

[fe/src/lib/Card.svelte](/fe/src/lib/Card.svelte):
- Added a new `height` prop to the Card component

[fe/src/lib/Column.svelte](/fe/src/lib/Column.svelte):
- Added a new CSS class for column layout
- Set the width and gap using CSS variables

[fe/src/lib/DataView.svelte](/fe/src/lib/DataView.svelte):
- Updated the 'fetchData' function to also fetch 'totals' and 'userStats' data
- Added canvas references and chart variables for bar and line charts
- Added a new 'getLastSevenDays' function to calculate the labels for the charts
- Updated the 'onMount' function to initialize the bar and line charts using the canvas references and data
- Updated the 'onDestroy' function to destroy the bar and line charts
- Added a new 'addFormOpen' store and imported it
- Added a new 'onClick' handler for the Add button to open the AddForm modal
- Updated the layout and added Card components to display the bar and line charts and the JSON data
- Added a new 'fetchTotals' function to fetch data for the 'totals' section
- Added a new 'fetchStatsForUser' function to fetch data for the 'userStats' section

[fe/src/lib/Layout.svelte](/fe/src/lib/Layout.svelte):
- Added a new 'preferenceFormOpen' variable and initialized it to 'false'
- Added a new 'showPreferencesDialog' function to set 'preferenceFormOpen' to 'true'
- Added a new 'closePreferenceDialog' function to set 'preferenceFormOpen' to 'false'
- Added a new 'showAddDialog' function to open the AddForm modal

In the `DataView.svelte` component, the last seven days are now included as labels in the chart. This allows users to easily visualize data for the past week. The `getLastSevenDays` function generates an array of string values representing the dates in ISO format. This array is assigned to the `lastSevenDays` variable, which is then used as the labels in the chart's dataset.

This commit adds functionality to add water statistics to the DataView component. It includes the following changes:
- Remove unused imports and variables
- Move the 'handleClick' function logic to a new 'AddForm' component
- Create the 'AddForm' component which displays a dialog with input fields for date and quantity and allows the user to add a new water statistic
- Dispatch events on form submit and dialog close in the 'AddForm' component
- Call the 'fetchData' function on successful submission of a new statistic
- Update chart data to display sample data

New component:
- AddForm.svelte: A form component to add a new water statistic

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