Install beside COSMIC instead of replacing it

The packages could not be installed. Claiming the cosmic-* names put 62 files
in conflict with 25 distribution packages -- something dnf's depsolve never
reports, because it shows up only in rpm's transaction check -- and the only
way to satisfy that was Conflicts against all 25, which erases cosmic-greeter.
On a stock Fedora COSMIC that is the display manager, so the machine comes
back to a text console with no way to log in and no session to fall back to.

So the fork ships what it actually forks. The three changed binaries take
hyprcosmic-comp, hyprcosmic-session and hyprcosmic-conf, the workflow reduces
the staged tree to those plus this fork's own assets, and cosmic-settings, the
portal, the OSD and the rest come from the distribution at the version it
tested them at. No Conflicts, no Provides, nothing erased, and the stock
COSMIC entry stays on the greeter's menu to fall back to.

Debian is the exception and keeps the whole desktop, because COSMIC is not
packaged there in any suite: there is nothing to depend on and nothing to
install beside. Its stock session entry is dropped instead, since start-cosmic
execs the cosmic-session this rename takes away.

README.md

@@ -18,12 +18,13 @@ Three things distinguish a HyprCosmic session from a COSMIC one:
 - **HyDE's shell.** waybar instead of cosmic-panel, rofi instead of
   cosmic-launcher, `awww` instead of cosmic-bg. HyDE themes are imported
   directly, palette and wallpapers and all.
-- **It replaces COSMIC rather than sitting next to it.** The binaries install as
-  `/usr/bin/cosmic-comp` and `/usr/bin/cosmic-session`, the paths a cosmic-comp
-  and a cosmic-session go to, and the packages conflict with the distribution's
-  accordingly. Both session entries are installed, so the greeter still offers a
-  stock COSMIC shell for the day the HyDE one does not start — now served by
-  these binaries rather than by a second copy on disk.
+- **It installs next to COSMIC rather than over it.** The binaries are
+  `/usr/bin/hyprcosmic-comp`, `/usr/bin/hyprcosmic-session` and
+  `/usr/bin/hyprcosmic-conf`, and nothing here writes a path the distribution
+  owns. The stock COSMIC entry stays on the greeter's menu, served by the
+  distribution's own binaries, so the day the HyDE session does not start is one
+  logout away from a desktop that does. (On Debian, where COSMIC is not
+  packaged, the `.deb` carries the desktop itself — see [Installing](#installing).)
 
 ## Repository layout
 
@@ -54,8 +55,9 @@ current.
   deliberately small: `dispatch exec` and `dispatch killactive` are rejected,
   because this is the surface any process that can open the socket gets.
 - New windows open *beside* the focused window rather than inside it.
-- The install goes to `/usr/bin/cosmic-comp`, at upstream's paths and alongside
-  upstream's two `.ron` defaults files, which are carried unmodified.
+- The install goes to `/usr/bin/hyprcosmic-comp`, alongside upstream's two
+  `.ron` defaults files, which are carried unmodified. The distribution's
+  `cosmic-comp` is left where it is, for the stock session to keep using.
 
 **cosmic-session** — profiles. `HYPRCOSMIC_PROFILE=hyprcosmic` (set by
 `hyprcosmic.desktop`) skips cosmic-panel, cosmic-launcher, cosmic-app-library,
@@ -93,14 +95,24 @@ sudo pacman -U   ./hyprcosmic-*.pkg.tar.zst  # Arch
 sudo dpkg -i     ./hyprcosmic_*_amd64.deb    # Debian
 ```
 
-Expect this to fail the first time, and read what it says when it does. These
-packages provide `/usr/bin/cosmic-comp` and `/usr/bin/cosmic-session`, so they
-**conflict with the distribution's `cosmic-comp` and `cosmic-session`** and your
-package manager will refuse until those are removed. That refusal is the design:
-installing HyprCosmic replaces the machine's desktop, and it should take a
-deliberate `dnf remove cosmic-comp cosmic-session` to say so rather than a
-resolver deciding on your behalf. Both session entries survive the swap, so the
-greeter still offers a stock COSMIC shell afterwards.
+Nothing is removed and nothing conflicts. COSMIC is a dependency rather than a
+casualty: the package installs `hyprcosmic-comp`, `hyprcosmic-session` and
+`hyprcosmic-conf` beside the distribution's, and takes cosmic-settings, the
+portal, the OSD and the rest from the distribution at the version it tested
+them at. Log out and pick **HyprCosmic** from the greeter; pick **COSMIC** to go
+back.
+
+An earlier revision did take the `cosmic-*` names, and it could not be
+installed. Its files collided with 25 distribution packages, and the only way to
+satisfy that was to erase them — including cosmic-greeter, which on a Fedora
+COSMIC install *is* the display manager. A desktop you can only try by removing
+the desktop you would fall back to is not one worth shipping.
+
+**Debian is the exception**, because COSMIC is not packaged there — no
+`cosmic-session`, no `cosmic-comp`, in any suite. There is nothing to depend on
+and nothing to install beside, so the `.deb` carries the whole desktop it
+compiled and stands alone, and the greeter offers **HyprCosmic** only. The
+Fedora and Arch packages ship this fork's three binaries and nothing else.
 
 Building it yourself instead:
 
@@ -125,6 +137,13 @@ This installs all of COSMIC — the 27 unmodified components as well — plus
 `cosmic-conf` at `$prefix/bin/cosmic-conf`, the shared waybar and rofi assets
 under `$prefix/share/hyprcosmic/`, and `hyprcosmic-powermenu`.
 
+Note that `just install` is not what the packages do. It writes upstream's whole
+desktop at upstream's names, so run against `/usr` on a machine that has COSMIC
+packaged it will overwrite files your package manager owns. The packages are
+built from this same tree and then reduced to this fork's own files and renamed;
+that step lives in `.github/workflows/packages.yml`, not in the justfile, which
+is upstream's. Stage to a directory and inspect it, or install a package.
+
 `install` depends on `build`, which is upstream's arrangement and means `sudo
 just install` compiles as root. That is inherited, not chosen; if you would
 rather not, build into a staging root as your own user and copy it into place.
@@ -161,9 +180,9 @@ Font for the bar's glyphs.
 `cosmic-config` by:
 
 ```shell
-cosmic-conf apply           # once
-cosmic-conf apply --diff    # show what would change, write nothing
-cosmic-conf watch           # recompile on every edit, for the whole session
+hyprcosmic-conf apply           # once
+hyprcosmic-conf apply --diff    # show what would change, write nothing
+hyprcosmic-conf watch           # recompile on every edit, for the whole session
 ```
 
 `watch` is the first line of the shipped `autostart`, which is what makes "the
@@ -208,7 +227,7 @@ the reference for what is supported.
 ## Theming
 
 ```shell
-cosmic-conf import-theme ~/.config/hyde/themes/'Tokyo Night'/hypr.theme \
+hyprcosmic-conf import-theme ~/.config/hyde/themes/'Tokyo Night'/hypr.theme \
     --out ~/.config/hyprcosmic/theme.conf --report --assets
 ```