feat(console): add curses VT220 renderer with full widget set

Implements BaseRenderer abstract interface and CursesRenderer with
green-on-black VT220 aesthetic. Includes all 18 widget methods: header,
footer, menu, table, detail, form, filter list, comparison view, box
drawing, message dialogs, and input prompts.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

console/renderers/base.py

@@ -0,0 +1,152 @@
+"""
+Abstract base renderer interface for the AUTOPARTES console application.
+
+Every renderer (curses VT220, Textual/Rich, etc.) must subclass
+:class:`BaseRenderer` and implement all of its methods.  Screens call
+these methods without knowing which backend is active.
+"""
+
+
+class BaseRenderer:
+    """Abstract interface that all renderers must implement.
+
+    Methods raise :exc:`NotImplementedError` so that missing overrides
+    are caught immediately at runtime.
+    """
+
+    # ── Lifecycle ────────────────────────────────────────────────────
+
+    def init_screen(self):
+        """Initialise the terminal / display backend."""
+        raise NotImplementedError
+
+    def cleanup(self):
+        """Restore the terminal to its original state."""
+        raise NotImplementedError
+
+    # ── Screen queries ───────────────────────────────────────────────
+
+    def get_size(self) -> tuple:
+        """Return ``(height, width)`` of the usable display area."""
+        raise NotImplementedError
+
+    # ── Primitive operations ─────────────────────────────────────────
+
+    def clear(self):
+        """Clear the entire screen buffer."""
+        raise NotImplementedError
+
+    def refresh(self):
+        """Flush the screen buffer to the terminal."""
+        raise NotImplementedError
+
+    def get_key(self) -> int:
+        """Block until a key is pressed and return its key code."""
+        raise NotImplementedError
+
+    # ── High-level widgets ───────────────────────────────────────────
+
+    def draw_header(self, title, subtitle=''):
+        """Draw the application header bar on the top two rows.
+
+        *title* is left-aligned; *subtitle* is right-aligned.
+        Row 1 is a horizontal separator.
+        """
+        raise NotImplementedError
+
+    def draw_footer(self, key_labels):
+        """Draw the footer bar on the bottom two rows.
+
+        *key_labels* is a list of ``(key, description)`` tuples,
+        e.g. ``[("F1", "Ayuda"), ("ESC", "Atras")]``.
+        """
+        raise NotImplementedError
+
+    def draw_menu(self, items, selected_index=0, title=''):
+        """Draw a numbered menu list starting at row 3.
+
+        *items* is a list of ``(number, label)`` tuples.
+        Separator items have ``number == '---'``.
+        The item at *selected_index* is highlighted.
+        """
+        raise NotImplementedError
+
+    def draw_table(self, headers, rows, widths, page_info=None,
+                   selected_row=-1):
+        """Draw a columnar data table.
+
+        *headers*: list of column header strings.
+        *rows*: list of row tuples (each tuple matches *headers*).
+        *widths*: list of int column widths.
+        *page_info*: optional dict ``{page, total_pages, total_rows}``.
+        *selected_row*: index of the highlighted row (-1 = none).
+        """
+        raise NotImplementedError
+
+    def draw_detail(self, fields, title=''):
+        """Draw a detail view with label-value pairs.
+
+        *fields* is a list of ``(label, value)`` tuples displayed as
+        ``Label........: Value``.
+        """
+        raise NotImplementedError
+
+    def draw_form(self, fields, focused_index=0, title=''):
+        """Draw an editable form.
+
+        *fields* is a list of dicts with keys:
+        ``label``, ``value``, ``width``, ``type``, ``hint``.
+        The field at *focused_index* uses the active style.
+        """
+        raise NotImplementedError
+
+    def draw_filter_list(self, items, filter_text, selected_index,
+                         title=''):
+        """Draw a filterable list with a text input at the top.
+
+        *items*: list of ``(number, label)`` tuples.
+        *filter_text*: current filter string.
+        *selected_index*: highlighted item index.
+        """
+        raise NotImplementedError
+
+    def draw_comparison(self, columns, title=''):
+        """Draw a side-by-side comparison view.
+
+        *columns* is a list of dicts, each with:
+        ``header`` (str) and ``rows`` (list of ``(label, value)``).
+        """
+        raise NotImplementedError
+
+    # ── Low-level drawing ────────────────────────────────────────────
+
+    def draw_text(self, row, col, text, style='normal'):
+        """Draw *text* at ``(row, col)`` using the named *style*."""
+        raise NotImplementedError
+
+    def draw_box(self, top, left, height, width, title=''):
+        """Draw a box with Unicode line-drawing characters.
+
+        Optional *title* is rendered in the top border.
+        """
+        raise NotImplementedError
+
+    # ── Dialogs ──────────────────────────────────────────────────────
+
+    def show_message(self, text, msg_type='info') -> bool:
+        """Show a centred message box.
+
+        *msg_type* is one of ``'info'``, ``'error'``, or ``'confirm'``.
+        For ``'confirm'`` the user must press S (si) or N (no);
+        returns ``True`` for S, ``False`` for N.
+        For other types, waits for any key and returns ``True``.
+        """
+        raise NotImplementedError
+
+    def show_input(self, prompt, max_len=40):
+        """Show a centred input dialog.
+
+        Returns the entered string, or ``None`` if the user pressed
+        Escape to cancel.
+        """
+        raise NotImplementedError