feat: Wave 3 — plugin loader + Flet GUI (parity with Rust fork)

Plugin loader (mirrors Rust #29):
- plugins_store.py walks %APPDATA%\com.priler.jarvis\plugins\<name>\
  for commands.yaml fragments and merges them into VA_CMD_LIST at
  startup. Same schema as the project root commands.yaml. Per-pack
  `disabled` flag file skips a pack without deletion. Built-in ids
  win conflicts so a malicious pack can't silently override
  open_browser. 9 unit tests (parity with the Rust tests).
- main.py: plugin merge runs after the root yaml load; logs the
  number of extra commands picked up.

Flet GUI (#27 — first parity with the Rust Tauri GUI):
- New gui/ package: __main__.py launches via `python -m gui` (or
  gui.bat). app.py routes between 7 pages (Главная / Команды /
  Макросы / Расписание / Память / Плагины / Настройки) via
  NavigationRail; dark theme matching the Tauri look.
- gui/services.py centralises every store-module call the pages
  share — single place to swap implementations later.
- One file per page in gui/pages/, all expose `build(page)` and use
  the same card layout idiom. Pages mirror the Tauri ones feature-
  for-feature: home (status + counters + launcher), commands
  (filterable list of all VA_CMD_LIST entries), macros (list +
  delete + recording banner), scheduler (list + remove), memory
  (add/forget/search), plugins (toggle/open folder), settings
  (profile + LLM hot-swap).
- requirements.txt: flet>=0.85 (optional; assistant runs without).
- 3 smoke tests verify imports + build callables; skip cleanly when
  Flet isn't installed.

README: documents both the GUI and the plugin layout in user-facing
terms. Tests: 42 → 54 (+9 plugins +3 GUI smoke).

gui/pages/macros.py

@@ -0,0 +1,90 @@
+"""Macros page — list macros, show steps, delete. Recording is voice-only."""
+
+import flet as ft
+
+from gui import services as svc
+
+
+def build(page: ft.Page) -> ft.Control:
+    list_view = ft.Column(spacing=8, expand=True, scroll=ft.ScrollMode.AUTO)
+
+    def render():
+        list_view.controls.clear()
+        macros = svc.macros_all()
+        rec_on, rec_name = svc.macros_recording()
+        if rec_on:
+            list_view.controls.append(_recording_banner(rec_name))
+        if not macros:
+            list_view.controls.append(
+                ft.Text(
+                    "Макросов пока нет. Запиши голосом: «Запиши макрос работа», "
+                    "потом скажи команды, потом «Сохрани макрос».",
+                    color="#8aa0a8",
+                )
+            )
+        for m in sorted(macros, key=lambda x: x["name"]):
+            list_view.controls.append(_macro_card(m, on_delete=lambda n=m["name"]: do_delete(n)))
+        page.update()
+
+    def do_delete(name: str) -> None:
+        if svc.macros_delete(name):
+            page.open(ft.SnackBar(content=ft.Text(f"Удалил «{name}»", color="white"), bgcolor="#33d3a4"))
+        render()
+
+    render()
+
+    return ft.Column(
+        [
+            ft.Row([
+                ft.Text("Макросы", size=24, weight=ft.FontWeight.W_700),
+                ft.FilledButton(text="Обновить", icon=ft.Icons.REFRESH, on_click=lambda e: render()),
+            ], alignment=ft.MainAxisAlignment.SPACE_BETWEEN),
+            list_view,
+        ],
+        expand=True,
+        spacing=10,
+    )
+
+
+def _recording_banner(name: str | None) -> ft.Control:
+    return ft.Container(
+        content=ft.Row([
+            ft.Icon(ft.Icons.FIBER_MANUAL_RECORD, color="#ff5757"),
+            ft.Text(
+                f"Идёт запись макроса «{name or '—'}». "
+                "Произнесите команды, затем «Сохрани макрос».",
+            ),
+        ]),
+        bgcolor="#3a2020",
+        border_radius=8,
+        padding=10,
+    )
+
+
+def _macro_card(m: dict, on_delete) -> ft.Control:
+    steps = m.get("steps", [])
+    preview = steps[:5]
+    extra = len(steps) - len(preview)
+    return ft.Container(
+        content=ft.Column([
+            ft.Row([
+                ft.Text(m["name"], weight=ft.FontWeight.W_600, size=14),
+                ft.Container(
+                    content=ft.Text(f"{m['steps_count']} шагов", size=10),
+                    bgcolor="#1e3a44",
+                    padding=ft.padding.symmetric(horizontal=8, vertical=2),
+                    border_radius=10,
+                ),
+            ], alignment=ft.MainAxisAlignment.SPACE_BETWEEN),
+            ft.Column([
+                ft.Text(f"• {s}", size=11, color="#a8b8c0") for s in preview
+            ] + ([ft.Text(f"+ ещё {extra}…", size=11, color="#5a6a72", italic=True)] if extra > 0 else []),
+                spacing=2),
+            ft.Row([
+                ft.OutlinedButton(text="Удалить", icon=ft.Icons.DELETE, on_click=lambda e: on_delete()),
+            ]),
+        ], spacing=8),
+        bgcolor="#15252b",
+        border_radius=8,
+        padding=12,
+    )