Accept backtab keybinding aliases

Author: SqlRush

docs/cc-100-roadmap.md

@@ -154,6 +154,8 @@ M7 补充：keybinding action parser 现在接受更多 editor/global-style acti
 
 M7 补充：keybinding config 和脚本 named-key 输入现在接受短修饰符别名，包括 `c-`/`m-`/`a-`/`opt-`/`s-` 以及 compact/camel 形式，可覆盖 control、meta、alt、option 和 shift key names。
 
+M7 补充：keybinding config 和脚本 named-key 输入现在接受 `backtab`/`back-tab`/`btab` 等 Shift-Tab terminfo/fixture 别名，并映射到既有 focus-previous key surface。
+
 M7 补充：interaction script 的 `keys` 字段现在支持 printable text chunk 和空格分隔 named-key sequence，例如 `ctrl-x ctrl-k`，减少官方脚本把连续输入拆成数组的改写成本。
 
 M7 补充：interaction script key input 现在接受 press-style aliases，包括 `press`、`keyPress`、`keypress`、`shortcutKey`、`presses`、`keyPresses` 和 `shortcuts`。
@@ -478,6 +480,8 @@ M7 补充：prompt history `LogEntry` 读取现在接受 `sessionID`/`session`/`
 
 本轮补充：keybinding config 和脚本 named-key 输入现在接受短修饰符别名，包括 `c-`/`m-`/`a-`/`opt-`/`s-` 以及 compact/camel 形式，可覆盖 control、meta、alt、option 和 shift key names。
 
+本轮补充：keybinding config 和脚本 named-key 输入现在接受 `backtab`/`back-tab`/`btab` 等 Shift-Tab terminfo/fixture 别名，并映射到既有 focus-previous key surface。
+
 本轮补充：interaction script 的 `keys` 字段现在支持 printable text chunk 和空格分隔 named-key sequence，例如 `ctrl-x ctrl-k`，减少官方脚本把连续输入拆成数组的改写成本。
 
 本轮补充：interaction script key input 现在接受 press-style aliases，包括 `press`、`keyPress`、`keypress`、`shortcutKey`、`presses`、`keyPresses` 和 `shortcuts`。

docs/claude-code-go-rewrite-plan.md

@@ -264,6 +264,7 @@ test/parity/                 # golden tests against TS/official behavior
 - 本轮补充：keybinding config 和脚本 named-key 输入接受 DOM-style arrow key aliases，包括 `arrowLeft`/`arrowRight`/`arrowUp`/`arrowDown` 以及 ctrl/alt/meta/option arrow variants。
 - 本轮补充：keybinding action parser 接受更多 editor/global-style action aliases，包括 `cursorLeft`/`cursorRight`、`lineStart`/`lineEnd`、`deletePreviousChar`/`deleteNextChar`、`killLine`、`pasteKillRing`/`yankPrevious`、`clearScreen`、`openExternalEditor`、`toggleTasks`、`cancelAgents`、`focusPrev`、`acceptSelection` 和 `search`。
 - 本轮补充：keybinding config 和脚本 named-key 输入接受短修饰符别名，包括 `c-`/`m-`/`a-`/`opt-`/`s-` 以及 compact/camel 形式，可覆盖 control、meta、alt、option 和 shift key names。
+- 本轮补充：keybinding config 和脚本 named-key 输入现在接受 `backtab`/`back-tab`/`btab` 等 Shift-Tab terminfo/fixture 别名，并映射到既有 focus-previous key surface。
 - 本轮补充：interaction script 的 `keys` 字段支持 printable text chunk 和空格分隔 named-key sequence，例如 `ctrl-x ctrl-k`，减少官方脚本把连续输入拆成数组的改写成本。
 - 本轮补充：interaction script key input 接受 press-style aliases，包括 `press`、`keyPress`、`keypress`、`shortcutKey`、`presses`、`keyPresses` 和 `shortcuts`。
 - 本轮补充：terminal CSI-u/kitty keyboard parser 接受 `codepoint:alternate` 和 `modifier:event-type` 冒号字段，按主 codepoint/modifier 解析 ctrl/alt/shift/rune 键，覆盖 kitty progressive keyboard protocol 的常见变体。

docs/first-second-parity-audit.md

@@ -256,6 +256,7 @@ M7 progress now includes:
 - `internal/tui`: keybinding config and named-key script input now accept DOM-style arrow key aliases such as `arrowLeft`, `arrowRight`, `arrowUp`, `arrowDown`, and modifier-arrow variants.
 - `internal/tui`: keybinding action parsing now accepts broader editor/global-style aliases such as `cursorLeft`, `lineStart`, `deletePreviousChar`, `killLine`, `pasteKillRing`, `clearScreen`, `openExternalEditor`, `toggleTasks`, `cancelAgents`, `focusPrev`, `acceptSelection`, and `search`.
 - `internal/tui`: keybinding config and named-key script input now accept short modifier aliases such as `c-left`, `cA`, `m-b`, `a-right`, `optF`, `s-tab`, and `sEnter`.
+- `internal/tui`: keybinding config and named-key script input now accept Shift-Tab terminfo aliases such as `backtab`, `back-tab`, and `btab`, mapping them to the existing focus-previous key surface.
 - `internal/tui`: scripted interaction `keys` entries now accept printable text chunks and whitespace-separated named key sequences such as `ctrl-x ctrl-k`.
 - `internal/tui`: scripted interaction key input now accepts press-style aliases such as `press`, `keyPress`, `keypress`, `shortcutKey`, `presses`, `keyPresses`, and `shortcuts`.
 - `internal/tui`: terminal key parsing now accepts CSI-u/kitty keyboard protocol sequences for existing ctrl/alt editing keys, shift-enter, shift-tab, and printable shift-only runes.

internal/tui/keybinding_config.go

@@ -120,7 +120,7 @@ func ParseKeyName(raw string) (KeyType, error) {
 		return KeyEnd, nil
 	case "tab", "ctrl+i", "ctrl-i", "control+i", "control-i":
 		return KeyTab, nil
-	case "shift+tab", "shift-tab":
+	case "shift+tab", "shift-tab", "backtab", "back-tab", "btab":
 		return KeyShiftTab, nil
 	case "ctrl+a", "ctrl-a", "control+a", "control-a":
 		return KeyCtrlA, nil
@@ -178,7 +178,7 @@ func ParseKeyName(raw string) (KeyType, error) {
 		return KeyEsc, nil
 	case "shiftenter", "shiftreturn":
 		return KeyShiftEnter, nil
-	case "shifttab":
+	case "shifttab", "backtab", "btab":
 		return KeyShiftTab, nil
 	case "altb", "metab", "optionb":
 		return KeyAltB, nil

internal/tui/tui_test.go

@@ -1358,6 +1358,7 @@ func TestKeymapFromSpecsOverridesAndRemovesBindings(t *testing.T) {
 		{Key: "ctrl-h", Action: ActionDeleteWordBack},
 		{Key: "ctrl-i", Action: ActionPageDown},
 		{Key: "ctrl-m", Action: ActionSubmitPrompt},
+		{Key: "btab", Action: ActionFocusPrevious},
 	})
 	if err != nil {
 		t.Fatal(err)
@@ -1389,6 +1390,9 @@ func TestKeymapFromSpecsOverridesAndRemovesBindings(t *testing.T) {
 	if action := keymap.Resolve(ParseKey("\n")); action != ActionSubmitPrompt {
 		t.Fatalf("ctrl-m terminal alias action = %q", action)
 	}
+	if action := keymap.Resolve(ParseKey("\x1b[Z")); action != ActionFocusPrevious {
+		t.Fatalf("btab alias action = %q", action)
+	}
 	for _, tc := range []struct {
 		name string
 		want Action
@@ -1443,7 +1447,7 @@ func TestKeymapFromSpecsOverridesAndRemovesBindings(t *testing.T) {
 			t.Fatalf("ParseActionName(%q) = %q, %v", tc.name, action, err)
 		}
 	}
-	for _, name := range []string{"paste", "image-hint", "mouse", "focus-out", "shift-enter", "shift+return", "shiftEnter", "shiftReturn", "shiftTab", "s-tab", "sTab", "s-enter", "sReturn", "page-up", "pgup", "pg-up", "prior", "page-down", "pgdn", "pg-dn", "pgdown", "pg-down", "next", "arrowLeft", "arrowRight", "arrowUp", "arrowDown", "alt-b", "alt-d", "alt-f", "alt-y", "alt-backspace", "alt-left", "alt-right", "alt-arrow-left", "alt-arrow-right", "altB", "metaD", "optionF", "altY", "altBackspace", "altLeft", "optionRight", "altArrowLeft", "metaArrowRight", "optionArrowLeft", "m-b", "mB", "a-d", "aD", "opt-f", "optF", "m-left", "m-arrow-left", "mArrowLeft", "a-right", "aArrowRight", "optRight", "optArrowRight", "meta-b", "meta-d", "meta-f", "meta-y", "meta-backspace", "meta-left", "meta-right", "option-arrow-left", "option-arrow-right", "ctrl-b", "ctrl-d", "ctrl-f", "ctrl-g", "ctrl-u", "ctrl-k", "ctrl-l", "ctrl-n", "ctrl-o", "ctrl-p", "ctrl-s", "ctrl-t", "ctrl-w", "ctrl-x", "ctrl-y", "ctrl-h", "ctrl-i", "ctrl-m", "control-h", "control-i", "control-m", "c-h", "c-i", "c-m", "c-[", "c-?", "ctrlH", "controlI", "ctrlM", "cH", "cI", "cM", "ctrl-left", "ctrl-right", "ctrl-arrow-left", "ctrl-arrow-right", "ctrlArrowLeft", "controlArrowRight", "c-left", "c-arrow-left", "c-right", "c-arrow-right", "ctrlA", "controlX", "ctrlLeft", "controlRight", "cA", "cLeft", "cArrowRight", "control-left", "control-right", "control-arrow-left", "control-arrow-right"} {
+	for _, name := range []string{"paste", "image-hint", "mouse", "focus-out", "shift-enter", "shift+return", "shiftEnter", "shiftReturn", "shiftTab", "backtab", "back-tab", "backTab", "btab", "s-tab", "sTab", "s-enter", "sReturn", "page-up", "pgup", "pg-up", "prior", "page-down", "pgdn", "pg-dn", "pgdown", "pg-down", "next", "arrowLeft", "arrowRight", "arrowUp", "arrowDown", "alt-b", "alt-d", "alt-f", "alt-y", "alt-backspace", "alt-left", "alt-right", "alt-arrow-left", "alt-arrow-right", "altB", "metaD", "optionF", "altY", "altBackspace", "altLeft", "optionRight", "altArrowLeft", "metaArrowRight", "optionArrowLeft", "m-b", "mB", "a-d", "aD", "opt-f", "optF", "m-left", "m-arrow-left", "mArrowLeft", "a-right", "aArrowRight", "optRight", "optArrowRight", "meta-b", "meta-d", "meta-f", "meta-y", "meta-backspace", "meta-left", "meta-right", "option-arrow-left", "option-arrow-right", "ctrl-b", "ctrl-d", "ctrl-f", "ctrl-g", "ctrl-u", "ctrl-k", "ctrl-l", "ctrl-n", "ctrl-o", "ctrl-p", "ctrl-s", "ctrl-t", "ctrl-w", "ctrl-x", "ctrl-y", "ctrl-h", "ctrl-i", "ctrl-m", "control-h", "control-i", "control-m", "c-h", "c-i", "c-m", "c-[", "c-?", "ctrlH", "controlI", "ctrlM", "cH", "cI", "cM", "ctrl-left", "ctrl-right", "ctrl-arrow-left", "ctrl-arrow-right", "ctrlArrowLeft", "controlArrowRight", "c-left", "c-arrow-left", "c-right", "c-arrow-right", "ctrlA", "controlX", "ctrlLeft", "controlRight", "cA", "cLeft", "cArrowRight", "control-left", "control-right", "control-arrow-left", "control-arrow-right"} {
 		if key, err := ParseKeyName(name); err != nil || key == KeyUnknown {
 			t.Fatalf("ParseKeyName(%q) = %q, %v", name, key, err)
 		}