Integrate native Rime and stabilize input, output, and rendering

- Add optional modifier-only Super binding whose tap is cancelled by
  other input, focus changes, grabs, locks, and session teardown.
- Ship the native ferese-rime user service, Rime defaults, installer
  inventory, package dependencies, session environment, and docs.
- Vendor Smithay 8a27023 with the SHM texture-cache format fix and add
  GPU regressions for format changes and resize snapshots.
- Release reused CRTC owners before staging output modes, then restore
  changed outputs before former owners when a transaction fails.
- Wait for resize-capture GPU completion, expand filtered surface
  damage, and preserve IME popup origin under fractional scaling.
- Mark weekends like holidays in both calendar layouts.

scripts/installer/install.py

@@ -169,11 +169,11 @@ def validate_bundle(bundle, *, installed=False):
     actual = {str(path.relative_to(bundle)) for path in bundle.rglob('*') if path.is_file()}
     required = expected.keys()
     if installed:
-        # Installed releases may predate the appearance wallpapers and license.
+        # Installed releases may predate the appearance assets or native Rime.
         # New bundles must include them; upgrades and rollback verify the older
         # release's recorded files without requiring these later additions.
         required = required - {'wallpapers/ferese-wallpaper-dark.png', 'wallpapers/ferese-wallpaper-light.png',
-                               'licenses/Ferese-LICENSE.txt'}
+                               'licenses/Ferese-LICENSE.txt', 'ferese-rime', 'rime/default.custom.yaml'}
         required = {target for target in required if not target.startswith('activities/')}
 
     if not required <= seen or actual != seen | {'manifest.json'}:

scripts/installer/inventory.json

@@ -6,6 +6,7 @@
     "feresectl",
     "ferese-lock",
     "ferese-polkit-agent",
+    "ferese-rime",
     "xdg-desktop-portal-ferese"
   ],
   "files": [
@@ -50,6 +51,17 @@
       "mode": "0755",
       "link": true
     },
+    {
+      "source": "target/release/ferese-rime",
+      "target": "ferese-rime",
+      "mode": "0755",
+      "link": true
+    },
+    {
+      "source": "packaging/rime/default.custom.yaml",
+      "target": "rime/default.custom.yaml",
+      "mode": "0644"
+    },
     {
       "source": "target/release/xdg-desktop-portal-ferese",
       "target": "xdg-desktop-portal-ferese",