Replaces the Plotly-based graph generation in the SQL Explorer with direct SVG rendering within an HTML template, similar to the exercise progress sparklines.
- Modifies `routes/sql_explorer.py` endpoints (`plot_query`, `plot_unsaved_query`) to fetch raw data instead of using pandas/Plotly.
- Adds `utils.prepare_svg_plot_data` to process raw SQL results, determine plot type (scatter, line, bar, table), normalize data, and prepare it for SVG.
- Creates `templates/partials/sql_explorer/svg_plot.html` to render the SVG plot with axes, ticks, labels, and basic tooltips.
- Removes the `generate_plot` function's usage for SQL Explorer and the direct dependency on Plotly for this feature.
- Moved endpoint listing and searching routes (`list_endpoints`, `search_endpoints`) and helper function (`get_routes`) from `app.py` into a new blueprint at `routes/endpoints.py`.
- Added `/endpoints` URL prefix to the blueprint.
- Registered the new `endpoints_bp` blueprint in `app.py`.
- Removed the original endpoint route definitions and helper function from `app.py`.
- Updated `url_for` calls in relevant templates (`endpoints.html`, `base.html`) to reference the new blueprint endpoints (e.g., `endpoints.list_endpoints`).
- Updated `templates/changelog/changelog.html` to document this refactoring.
```
Here is a conventional commit message summarizing the changes:
```
feat: Refactor SQL Explorer into blueprint
- Moved SQL Explorer routes (view explorer, save/load/execute/delete queries, view schema, plot queries) from `app.py` into a new blueprint at `routes/sql_explorer.py`.
- Added `/sql` URL prefix to the blueprint.
- Registered the new `sql_explorer_bp` blueprint in `app.py`.
- Removed the original SQL Explorer route definitions from `app.py`.
- Updated `url_for` calls in relevant templates (`sql_explorer.html`, `partials/sql_explorer/sql_query.html`, `base.html`) to reference the new blueprint endpoints (e.g., `sql_explorer.sql_explorer`).
- Updated `templates/changelog/changelog.html` to document this refactoring.
```
Adds a new static page accessible at /changelog to display site updates and changes manually.
- Creates a new Flask Blueprint in `routes/changelog.py` to handle the route logic.
- Registers the `changelog_bp` blueprint in `app.py`.
- Creates the corresponding template `templates/changelog/changelog.html` extending the base layout.
- Adds a link to the Changelog page in the main sidebar navigation in `templates/base.html`, using an archive icon for consistency.
- Applies basic card styling to the changelog page content for improved visual structure.
