Keep searchi resident with a global search shortcut and tray

docs/WINDOWS-0.1.7.md

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+# Windows resident launcher
+
+Version 0.1.7 adds a global launcher workflow. `Ctrl+Shift+Space` restores the
+window and selects the search field. Escape dismisses a popover first, then
+hides the native window. Closing the window also hides it, keeping prepared
+search readers and the shortcut alive. Hidden audio/video previews pause.
+The tray provides Show searchi and an explicit Quit action.
+
+`--background` starts without showing the main window; a duplicate background
+launch does not interrupt an existing session. Karl's Windows Dev installation
+now has a login shortcut using this flag and the existing CPU-only VM wrapper.
+Production acceleration remains automatic; the wrapper is a VM constraint.
+
+Validation: three native instance tests and strict desktop Clippy passed.
+Frontend build, 62 tests and formatting passed. The release executable compiled
+and was installed as 0.1.7, then observed with `--background`. Settings remained
+byte-identical after a consistent SQLite backup; database quick_check passed.
+The updated normal speech runtime was verified/staged and passed its installed
+self-test with forced CPU. The built-in key uses the existing focus handler.
+
+Actual native keyboard/tray interaction was not automated; available computer
+control does not support it in this session. These checks do not close broader
+GPU, macOS, clean-machine or search-quality gates. Release packaging is pending.