Consolidate SSH config: merge duplicate hosts, fix paths and formatting

- Merge same-user hosts into grouped Host entries (timmy, ma)
- Fix ssh_key_management.sh path from ~/Sync to iCloud
- Standardize = syntax to space-separated (jason_hsieh)
- Unify indentation to 4 spaces (config)
- Remove duplicate 192.168.88.173 entry and redundant HostNames

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

config.d/ma

@@ -1,69 +1,37 @@
 Host 192.168.77.10
-	User root
+    User root
 
 # MA 防火牆
 Host ma_fw
     HostName 192.168.88.1
     User ubuntu
 
-
-Host 192.168.88.2
-	User root
-
-Host 192.168.88.99
-	User ubuntu
-
 Host 192.168.88.4 192.168.88.4.nip.io
-	User pi
+    User pi
 
-Host 192.168.88.10
-	User timmy
+# MA 內網主機 (root)
+Host 192.168.88.2
+    User root
 
-Host 192.168.88.11
-	User timmy
-
-Host 192.168.88.12
-	User timmy
-
-Host 192.168.88.13
-    User timmy            # 預設使用者：連線時自動使用 timmy 帳號登入
-
-Host 192.168.88.15
-	User ubuntu
-
-Host 192.168.88.16
-	User timmy
+# MA 內網主機 (timmy)
+Host 192.168.88.10 192.168.88.11 192.168.88.12 192.168.88.13 192.168.88.16 192.168.88.33
+    User timmy
 
 Host 192.168.88.18
-	User timmy
-	LocalForward 50041 127.0.0.1:80
+    User timmy
+    LocalForward 50041 127.0.0.1:80
 
-Host 192.168.88.19
-	User ubuntu
-
-Host 192.168.88.30
-	User ubuntu
-
-Host 192.168.88.31
-	User ubuntu
-
-Host 192.168.88.173
-	User ubuntu
-
-Host 192.168.88.32
-	User ubuntu
-	Port 22
-
-Host 192.168.88.33
-	User timmy
+# MA 內網主機 (ubuntu)
+Host 192.168.88.15 192.168.88.19 192.168.88.30 192.168.88.31 192.168.88.32 192.168.88.99 192.168.88.181 192.168.88.193 192.168.88.194
+    User ubuntu
 
 # Mail Server MA (內網連線)
 Host mail_ma_local 192.168.88.35
     HostName 192.168.88.35
     User timmy
-    LocalForward 16361 127.0.0.1:80    # Mail 管理介面
-    HostKeyAlgorithms +ssh-rsa         # 支援舊版加密
-    PubkeyAcceptedKeyTypes +ssh-rsa    # 支援舊版金鑰
+    LocalForward 16361 127.0.0.1:80
+    HostKeyAlgorithms +ssh-rsa
+    PubkeyAcceptedKeyTypes +ssh-rsa
 
 # --- Timmy Personal Dev ---
 
@@ -99,63 +67,41 @@ Host ma_mediawiki
     HostName 192.168.88.173
     User ubuntu
 
-Host 192.168.88.181
-	User ubuntu
+# --- MA 虛擬化主機 ---
 
-Host 192.168.88.193
-	User ubuntu
-	HostName 192.168.88.193
-
-Host 192.168.88.194
-	User ubuntu
-	HostName 192.168.88.194
-
-# This is VMware ESXi 6.0.0 Update 2 with the main firewall for MA on the 11th floor of Oriental Science Park (internal IP 192.168.88.1) and the firewall for implementing IPv6 (internal IP 192.168.88.150).
+# VMware ESXi 6.0.0 (11F 防火牆 + IPv6 防火牆)
 Host 192.168.88.241
-	User root
-	HostKeyAlgorithms +ssh-rsa
+    User root
+    HostKeyAlgorithms +ssh-rsa
 
-# This is the MA VMware ESXi 6.7.0 Update 1 server with a mail server, along with the firewall for the 5th floor of Oriental Science Park and a dedicated firewall for the mail server.
+# VMware ESXi 6.7.0 (郵件伺服器 + 5F 防火牆)
 Host 192.168.88.248
-	User root
+    User root
 
-# This is the MA PVE server.
-Host 192.168.88.247
-	User root
+# PVE 伺服器
+Host 192.168.88.247 192.168.88.249 192.168.88.73
+    User root
 
-# This is the MA PVE server.
-Host 192.168.88.249
-	User root
-
-# This is the MA PVE server.
-Host 192.168.88.73
-	User root
-
-
-# This is the firewall for MA on the 5th floor of Oriental Science Park.
+# 5F 防火牆 (東方科學園區)
 Host 192.168.3.88
-	User apple
-	ProxyJump 211.23.141.208
-	Ciphers aes256-cbc,aes256-ctr
+    User apple
+    ProxyJump 211.23.141.208
+    Ciphers aes256-cbc,aes256-ctr
 
-# This is the firewall for MA on the 11th floor of Oriental Science Park.
+# 11F 防火牆 (東方科學園區)
 Host 211.23.141.208
-	User ubuntu
+    User ubuntu
 
-# This is the firewall for MA on the 11th floor of Oriental Science Park.
-# Host 211.23.141.207
-#	User timmy
-
-# This is the Ubuntu Server for the Serbia office.
+# Serbia 辦公室
 Host 89.216.107.241 serbia-office
-	HostName 89.216.107.241
-	User timmy
-	Port 8022
-	Ciphers aes256-cbc,aes256-ctr
-	ProxyJump 211.23.141.208
+    HostName 89.216.107.241
+    User timmy
+    Port 8022
+    Ciphers aes256-cbc,aes256-ctr
+    ProxyJump 211.23.141.208
 
 # 遠振
 Host 103.123.242.152 yz-prod
-	User root
-	HostName 103.123.242.152
-	HostKeyAlgorithms ssh-rsa
+    User root
+    HostName 103.123.242.152
+    HostKeyAlgorithms ssh-rsa