refactor(app): improve terminal profile modal form and zinc button contrast

- Extract terminal profile add/edit modal into a reusable component with shared FormField/FormTextInput primitives.
- Add inline validation, save-pending state, and keyboard navigation.
- Fix zinc theme primary button foreground contrast by using accentForeground/destructiveForeground tokens.

Closes #1484

packages/app/src/i18n/resources/ar.ts

@@ -1642,7 +1642,10 @@ export const ar: TranslationResources = {
         nameLabel: "Name",
         commandLabel: "Command",
         argsLabel: "Arguments",
+        nameRequired: "Name is required",
+        commandRequired: "Command is required",
         argsHint: "Space-separated arguments passed to the command",
+        saving: "Saving...",
         remove: "Remove",
         removeConfirmTitle: "Remove profile?",
         removeConfirmMessage: 'Remove "{{name}}"?',

packages/app/src/i18n/resources/en.ts

@@ -1648,7 +1648,10 @@ export const en = {
         nameLabel: "Name",
         commandLabel: "Command",
         argsLabel: "Arguments",
+        nameRequired: "Name is required",
+        commandRequired: "Command is required",
         argsHint: "Space-separated arguments passed to the command",
+        saving: "Saving...",
         remove: "Remove",
         removeConfirmTitle: "Remove profile?",
         removeConfirmMessage: 'Remove "{{name}}"?',

packages/app/src/i18n/resources/es.ts

@@ -1680,7 +1680,10 @@ export const es: TranslationResources = {
         nameLabel: "Name",
         commandLabel: "Command",
         argsLabel: "Arguments",
+        nameRequired: "Name is required",
+        commandRequired: "Command is required",
         argsHint: "Space-separated arguments passed to the command",
+        saving: "Saving...",
         remove: "Remove",
         removeConfirmTitle: "Remove profile?",
         removeConfirmMessage: 'Remove "{{name}}"?',

packages/app/src/i18n/resources/fr.ts

@@ -1685,7 +1685,10 @@ export const fr: TranslationResources = {
         nameLabel: "Name",
         commandLabel: "Command",
         argsLabel: "Arguments",
+        nameRequired: "Name is required",
+        commandRequired: "Command is required",
         argsHint: "Space-separated arguments passed to the command",
+        saving: "Saving...",
         remove: "Remove",
         removeConfirmTitle: "Remove profile?",
         removeConfirmMessage: 'Remove "{{name}}"?',

packages/app/src/i18n/resources/ru.ts

@@ -1672,7 +1672,10 @@ export const ru: TranslationResources = {
         nameLabel: "Name",
         commandLabel: "Command",
         argsLabel: "Arguments",
+        nameRequired: "Name is required",
+        commandRequired: "Command is required",
         argsHint: "Space-separated arguments passed to the command",
+        saving: "Saving...",
         remove: "Remove",
         removeConfirmTitle: "Remove profile?",
         removeConfirmMessage: 'Remove "{{name}}"?',

packages/app/src/i18n/resources/zh-CN.ts

@@ -1623,7 +1623,10 @@ export const zhCN: TranslationResources = {
         nameLabel: "Name",
         commandLabel: "Command",
         argsLabel: "Arguments",
+        nameRequired: "Name is required",
+        commandRequired: "Command is required",
         argsHint: "Space-separated arguments passed to the command",
+        saving: "Saving...",
         remove: "Remove",
         removeConfirmTitle: "Remove profile?",
         removeConfirmMessage: 'Remove "{{name}}"?',