Add model downloads, History deletion, a new keyboard, and new icons

BRANDING.md

@@ -4,7 +4,7 @@ The Apache License 2.0 covers the repository's copyrightable source,
 documentation, and assets. It does not grant trademark rights beyond the uses
 described in Section 6.
 
-Hardware Controller, the Longdevity product namespace, and the Signal Bridge
+Hardware Controller, the Longdevity product namespace, and the Center Signal
 visual identity identify the canonical project maintained by Marcus John Rice
 Lee. You may accurately describe a derivative as based on Hardware Controller.
 Do not present a modified build as an official build or imply endorsement by

CONTRIBUTING.md

@@ -70,6 +70,8 @@ without a timeout, over budget, or on macOS without `needs: changes` or push
 | `Sources/hardware_controller_voice_ffi/`, `Sources/voice_ffi_bridge/` | Typed Swift over the Rust C ABI. |
 | `Sources/voice_asr_bridge/`, `Sources/voice_asr_runtime/` | C bridge over transcribe.cpp and its typed Swift owner. |
 | `Sources/hardware_controller_asr_*` | macOS ASR XPC service, its kit, and the app-to-service protocol. |
+| `Sources/hardware_controller_model_download/` | Pinned speech-model catalog, HTTPS fetcher, and verifying assembler for both apps. |
+| `tools/app_icons/` | Code that renders both app icons. |
 | `crates/` | Portable Rust: `voice_core`, `voice_models`, `voice_archive`, `voice_ffi`. |
 | `apps/ios/voice_input/` | iOS app, keyboard, widgets, and their tests. |
 | `schemas/` | Versioned Model-package and archive contracts. |

Package.swift

@@ -103,12 +103,17 @@ let package = Package(
       dependencies: ["HardwareControllerASRServiceKit"],
       path: "Sources/hardware_controller_asr_service"
     ),
+    .target(
+      name: "HardwareControllerModelDownload",
+      path: "Sources/hardware_controller_model_download"
+    ),
     .target(
       name: "HardwareControllerMac",
       dependencies: [
         "HardwareControllerASRProtocol",
         "HardwareControllerAudioBoundary",
         "HardwareControllerCore",
+        "HardwareControllerModelDownload",
         "HardwareControllerVoiceFFI",
       ],
       linkerSettings: [
@@ -127,6 +132,7 @@ let package = Package(
       dependencies: [
         "HardwareControllerCore",
         "HardwareControllerMac",
+        "HardwareControllerModelDownload",
       ]
     ),
     .testTarget(
@@ -149,6 +155,7 @@ let package = Package(
       dependencies: [
         "HardwareControllerCore",
         "HardwareControllerMac",
+        "HardwareControllerModelDownload",
         "HardwareControllerVoiceFFI",
       ]
     ),
@@ -177,8 +184,14 @@ let package = Package(
       dependencies: [
         "HardwareControllerApp",
         "HardwareControllerCore",
+        "HardwareControllerModelDownload",
       ]
     ),
+    .testTarget(
+      name: "HardwareControllerModelDownloadTests",
+      dependencies: ["HardwareControllerModelDownload"],
+      path: "Tests/hardware_controller_model_download_tests"
+    ),
   ],
   swiftLanguageModes: [.v6]
 )

README.md

@@ -51,9 +51,9 @@ are listed in [CONTRIBUTING.md](CONTRIBUTING.md#opt-in-system-checks).
 Calm, tactile, precise: a studio utility, not a settings form. Neutral
 surfaces, system typography, no decorative borders, and one strong action per
 workflow. Color appears only for active state, required attention, or errors.
-The icon, Signal Bridge, is three generic nodes joined by one amber signal
-path ([source](packaging/app_icon_source.png)); iOS Voice Input crops the same
-art full-bleed and paints amber only while recording. Details:
+The icons, Center Signal, are rounded capsules on graphite with only the
+center lit amber: three pedals for Hardware Controller, a voice waveform for
+Voice Input (`swift tools/app_icons/render_app_icons.swift`). Details:
 [UX specification](docs/ux_spec.md).
 
 ## Documentation

Sources/HardwareControllerApp/speech_engine_model.swift

@@ -1,6 +1,7 @@
 import Foundation
 import HardwareControllerCore
 import HardwareControllerMac
+import HardwareControllerModelDownload
 import Observation
 
 /// Owns the speech engine choice, its Model package, and the download.