feat: Linux packaging, SDK v0.7.1, fix rawmode conflict

- go.mod: SDK pseudo-version -> v0.7.1 (remote tag), go.sum updated
- cmd/waiter/rawmode_linux.go: remove (conflicts with raw_unix.go)
- cmd/gui/package.json: add rpm/AppImage Linux targets
- package/package-linux.sh: cross-distro packaging script (deb/tar.gz/rpm)
- package/linux/: DEBIAN control files, postinst/prerm, RPM spec

package/linux/deb/control-client

@@ -0,0 +1,18 @@
+Package: homeagent-client
+Version: VERSION_PLACEHOLDER
+Architecture: ARCH_PLACEHOLDER
+Maintainer: HomeAgent Team <team@homeagent.ai>
+Installed-Size: INSTALLED_SIZE_PLACEHOLDER
+Depends: libc6 (>= 2.28)
+Section: utils
+Priority: optional
+Homepage: https://github.com/trueagent/HomeAgent
+Description: HomeAgent Client (CLI + GUI, no daemon)
+ HomeAgent is a personal AI home assistant that integrates
+ large language models with system automation.
+ .
+ This package includes the client components:
+  - waiter: command-line client
+  - homeagent-gui: desktop graphical interface
+ .
+ This variant connects to a remote HomeAgent server.

package/linux/deb/control-full

@@ -0,0 +1,17 @@
+Package: homeagent-full
+Version: VERSION_PLACEHOLDER
+Architecture: ARCH_PLACEHOLDER
+Maintainer: HomeAgent Team <team@homeagent.ai>
+Installed-Size: INSTALLED_SIZE_PLACEHOLDER
+Depends: libc6 (>= 2.28)
+Section: utils
+Priority: optional
+Homepage: https://github.com/trueagent/HomeAgent
+Description: HomeAgent Full Installation (Daemon + CLI + GUI)
+ HomeAgent is a personal AI home assistant that integrates
+ large language models with system automation.
+ .
+ This package includes the full suite:
+  - homed: the core daemon (background service)
+  - waiter: command-line client
+  - homeagent-gui: desktop graphical interface

package/linux/deb/control-server

@@ -0,0 +1,16 @@
+Package: homeagent-server
+Version: VERSION_PLACEHOLDER
+Architecture: ARCH_PLACEHOLDER
+Maintainer: HomeAgent Team <team@homeagent.ai>
+Installed-Size: INSTALLED_SIZE_PLACEHOLDER
+Depends: libc6 (>= 2.28)
+Section: utils
+Priority: optional
+Homepage: https://github.com/trueagent/HomeAgent
+Description: HomeAgent Server (Daemon + CLI, no GUI)
+ HomeAgent is a personal AI home assistant that integrates
+ large language models with system automation.
+ .
+ This package includes the server components:
+  - homed: the core daemon (background service)
+  - waiter: command-line client

package/linux/deb/postinst

@@ -0,0 +1,25 @@
+#!/bin/sh
+set -e
+
+SERVICE_NAME="homeagent"
+SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"
+HOMED_BIN="/usr/bin/homed"
+DATA_DIR="/var/lib/homeagent"
+
+case "$1" in
+  configure)
+    if [ -f "$HOMED_BIN" ]; then
+      mkdir -p "$DATA_DIR"
+
+      if [ -f "$SERVICE_FILE" ]; then
+        systemctl daemon-reload 2>/dev/null || true
+      fi
+    fi
+    ;;
+  abort-upgrade|abort-remove|abort-deconfigure)
+    ;;
+  *)
+    ;;
+esac
+
+exit 0

package/linux/deb/prerm

@@ -0,0 +1,19 @@
+#!/bin/sh
+set -e
+
+SERVICE_NAME="homeagent"
+
+case "$1" in
+  remove|deconfigure)
+    if command -v systemctl >/dev/null 2>&1; then
+      systemctl stop "$SERVICE_NAME" 2>/dev/null || true
+      systemctl disable "$SERVICE_NAME" 2>/dev/null || true
+    fi
+    ;;
+  upgrade)
+    ;;
+  *)
+    ;;
+esac
+
+exit 0