feat(registry): onboard official bar plugin

.gitmodules

@@ -26,3 +26,6 @@
 [submodule "plugins/wheel"]
 	path = plugins/wheel
 	url = https://github.com/bitty-terminal/wheel
+[submodule "plugins/bar"]
+	path = plugins/bar
+	url = https://github.com/bitty-terminal/bar.git

generated/registry.json

@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "generated_at": "2026-10-04T11:34:20Z",
+  "generated_at": "2026-10-04T16:30:39Z",
   "plugins": [
     {
       "id": "bitty-featured.activity",
@@ -33,6 +33,31 @@
         "fetched_at": "2026-09-15T05:41:03Z"
       }
     },
+    {
+      "id": "bitty-terminal.bar",
+      "name": "Unified Bar",
+      "kind": "plugin",
+      "repository": "https://github.com/bitty-terminal/bar",
+      "official": true,
+      "signature_status": "unsigned",
+      "author": "bitty-terminal",
+      "description": "Consolidated workspace-bar, tabs, and statusline presentation over generic chrome insets.",
+      "tags": [
+        "bar",
+        "statusline",
+        "tabs",
+        "workspace-bar"
+      ],
+      "categories": [
+        "productivity"
+      ],
+      "license": "MIT",
+      "compatibility": {
+        "bitty": ">=0.5,<1.0",
+        "sdk": "^0.1"
+      },
+      "manifest_hash": "sha256:947df76140c1d92cc4b880e2cbe421d5bbbdf2df80881d114aac26ddaa8a0929"
+    },
     {
       "id": "bitty-terminal.file-manager",
       "name": "File Manager",

registry/official/bar.toml

@@ -0,0 +1,26 @@
+# Official registry entry: Unified Bar.
+#
+# Hand-maintained identity data only. Derived metadata (version, stars, dates,
+# downloads) is intentionally absent; `just registry-sync` mirrors the plugin's
+# bitty-plugin.toml into the optional `metadata` object of the generated index.
+#
+# Integrity (Phase 1, advisory): `manifest_hash` is the sha256 digest (H-A: raw
+# bytes) of the owning repository's `bitty-plugin.toml` at the pinned submodule
+# revision recorded by `git ls-tree HEAD plugins/bar`. This is a digest
+# over fetched transport bytes (H-A), not semantic canonical hashing (H-B).
+# Refresh it when the pin moves (see README "Registry model" refresh procedure).
+
+id = "bitty-terminal.bar"
+name = "Unified Bar"
+repository = "https://github.com/bitty-terminal/bar"
+kind = "plugin"
+author = "bitty-terminal"
+description = "Consolidated workspace-bar, tabs, and statusline presentation over generic chrome insets."
+tags = ["bar", "workspace-bar", "tabs", "statusline"]
+categories = ["productivity"]
+license = "MIT"
+manifest_hash = "sha256:947df76140c1d92cc4b880e2cbe421d5bbbdf2df80881d114aac26ddaa8a0929"
+
+[compatibility]
+bitty = ">=0.5,<1.0"
+sdk = "^0.1"