docs: architecture map (initial 5-slice generation, 105 pages)

Five-slice navigable map of the entire codebase under
docs/architecture-map/. Each slice is a self-contained
breadcrumbed sub-tree:

  01-frontend (16)              Svelte/SvelteKit UI
  02-tauri-runtime (26)         src-tauri commands + lifecycle
  03-audio-transcription (16)   audio + transcription crates
  04-llm-formatting-mcp (19)    llm, ai-formatting, mcp, cloud
  05-core-storage-hotkey-build  core, storage, hotkey, workspace,
                          (26) CI, dev glue

Plus master README.md and data-flow-end-to-end.md tracing
audio bytes from microphone to FTS5 search to MCP read.

Generated by 5 parallel subagents on 2026/05/09 against
HEAD 3c47000. Each page has YAML frontmatter, file:line code
refs, sibling cross-links, plain-English summaries.

Aggregated debt surfaced (full lists in master README):
RB-08 macOS power assertion, schema head drift v14 vs v15,
VAD blocked on ort version conflict, streaming primitives
not wired into live.rs, no prompt versioning, MCP has no
auth, cloud-providers in-memory keystore, SettingsPage
2 484 LOC, commands/live.rs 1 737 LOC, dual theme system,
brand rename to Lumenote pending across the codebase.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/architecture-map/02-tauri-runtime/system-tray.md

@@ -0,0 +1,56 @@
+---
+name: System tray
+type: architecture-map-page
+slice: 02-tauri-runtime
+last_verified: 2026/05/09
+---
+
+# System tray
+
+> **Where you are:** [Architecture map](../README.md) → [Tauri runtime](README.md) → System tray
+
+**Plain English summary.** Builds the desktop tray icon that lives in the system status area. The tray menu has Show, a disabled status row, an Evening wind-down shortcut (Phase 5 ritual), and Quit. Left-clicking the icon shows and focuses the main window.
+
+## At a glance
+
+- Path: `src-tauri/src/tray.rs`.
+- LOC: 73.
+- Compile gate: `#[cfg(not(target_os = "android"))]` — Android has no tray surface (declared at the `mod tray` line in `src-tauri/src/lib.rs:5`).
+- Tauri commands exposed: none. The tray is set up imperatively from `lib.rs::run` setup hook.
+- Events emitted: `magnotia:open-wind-down` (no payload) when the user clicks the wind-down menu item (`src-tauri/src/tray.rs:51`).
+- Depends on: `tauri::image::Image`, `tauri::menu::{MenuBuilder, MenuItemBuilder}`, `tauri::tray::TrayIconBuilder`, `tauri::{Emitter, Manager}`. No workspace crates.
+- Called from frontend at: the frontend layout listens for `magnotia:open-wind-down` and routes to the wind-down page.
+
+## What's in here
+
+### `setup(app)` (`src-tauri/src/tray.rs:6`)
+
+Builds the menu items: `show`, `status` (disabled, label "Ready"), `wind-down`, `quit`. Assembles them into a `MenuBuilder` with separators between groups. Falls back to a 1×1 transparent icon if `default_window_icon()` is None (which would be a packaging failure in production builds).
+
+Wires three handlers:
+
+- `on_menu_event` (`src-tauri/src/tray.rs:37`):
+  - `show` → `window.show(); window.set_focus();`
+  - `wind-down` → show + focus + emit `magnotia:open-wind-down`.
+  - `quit` → `app.exit(0)`.
+  - All other ids fall through.
+- `on_tray_icon_event` (`src-tauri/src/tray.rs:58`): a left-click brings the main window forward. Right-click is left to the platform default (which opens the menu).
+
+The tray icon's tooltip is `"Magnotia — Ready"`. The status menu item has label `"Ready"` and is disabled (the `enabled(false)` builder call leaves it visible but unclickable).
+
+## Data flow
+
+Out only: clicks on the tray menu either hide/show the window directly or fire one event to the frontend (`magnotia:open-wind-down`). The tray does not read any state.
+
+## Watch-outs
+
+- The status menu item is hard-coded "Ready". There is no wiring to update it dynamically as the engine moves between idle / loading / recording. If you want a live status, you'll need to retain a `TrayIcon` handle in `AppState` (or somewhere similar) so a command can call `set_tooltip` / update the menu item text.
+- The icon comes from `app.default_window_icon()` which is the packaged bundle icon (set in `tauri.conf.json` `bundle.icon`). Replacing the tray icon means re-running `tauri icon` or shipping a separate tray PNG.
+- The `magnotia:open-wind-down` event payload is `()` — the frontend just needs to know "navigate to the wind-down page", and the page itself decides whether to render the ritual or a "you have not enabled this yet" stub.
+- Close-to-tray (intercepting `WindowEvent::CloseRequested`) lives in `lib.rs::run` setup hook (`src-tauri/src/lib.rs:282`), not here. The two halves are split because the close-to-tray handler needs the cloned `WebviewWindow`.
+
+## See also
+
+- [App lifecycle](app-lifecycle.md) — `tray::setup(app)` is called at the end of the setup hook (`src-tauri/src/lib.rs:315`), and the close-to-tray handler in setup is what makes the tray useful.
+- [Tauri config](tauri-config.md) — bundle icon list feeds the tray.
+- [Capabilities and ACL](capabilities-and-acl.md) — the main capability includes `core:window:allow-show` / `allow-set-focus` / `allow-hide`, which are what the tray's menu actions implicitly rely on through Tauri's IPC layer.