diff --git a/packages/app/src/components/prompt-input/editor-dom.ts b/packages/app/src/components/prompt-input/editor-dom.ts
index 8575140d..1f248b82 100644
--- a/packages/app/src/components/prompt-input/editor-dom.ts
+++ b/packages/app/src/components/prompt-input/editor-dom.ts
@@ -79,16 +79,19 @@ export function setCursorPosition(parent: HTMLElement, position: number) {
       const selection = window.getSelection()
       if (remaining === 0) {
         range.setStartBefore(node)
+        range.collapse(true)
+        selection?.removeAllRanges()
+        selection?.addRange(range)
+        return
       }
-      if (remaining > 0 && isPill) {
+      if (isPill) {
         range.setStartAfter(node)
       }
-      if (remaining > 0 && isBreak) {
+      if (isBreak) {
         const next = node.nextSibling
         if (next && next.nodeType === Node.TEXT_NODE) {
           range.setStart(next, 0)
-        }
-        if (!next || next.nodeType !== Node.TEXT_NODE) {
+        } else {
           range.setStartAfter(node)
         }
       }
diff --git a/packages/app/src/i18n/en.ts b/packages/app/src/i18n/en.ts
index 8a2fbf87..f5b4c9ee 100644
--- a/packages/app/src/i18n/en.ts
+++ b/packages/app/src/i18n/en.ts
@@ -168,9 +168,9 @@ export const dict = {
   "provider.custom.field.name.placeholder": "My AI Provider",
   "provider.custom.field.baseURL.label": "Base URL",
   "provider.custom.field.baseURL.placeholder": "https://api.myprovider.com/v1",
-  "provider.custom.field.apiKey.label": "API key",
-  "provider.custom.field.apiKey.placeholder": "API key",
-  "provider.custom.field.apiKey.description": "Optional. Leave empty if you manage auth via headers.",
+  "provider.custom.field.apiKey.label": "API key (optional)",
+  "provider.custom.field.apiKey.placeholder": "sk-... or leave empty for local providers",
+  "provider.custom.field.apiKey.description": "Optional. Leave empty for local providers or if you manage auth via headers.",
   "provider.custom.models.label": "Models",
   "provider.custom.models.id.label": "ID",
   "provider.custom.models.id.placeholder": "model-id",
diff --git a/packages/app/src/i18n/zh.ts b/packages/app/src/i18n/zh.ts
index d95bfd19..15e7f108 100644
--- a/packages/app/src/i18n/zh.ts
+++ b/packages/app/src/i18n/zh.ts
@@ -188,9 +188,9 @@ export const dict = {
   "provider.custom.field.name.placeholder": "我的 AI 提供商",
   "provider.custom.field.baseURL.label": "基础 URL",
   "provider.custom.field.baseURL.placeholder": "https://api.myprovider.com/v1",
-  "provider.custom.field.apiKey.label": "API 密钥",
-  "provider.custom.field.apiKey.placeholder": "API 密钥",
-  "provider.custom.field.apiKey.description": "可选。如果你通过请求头管理认证，可留空。",
+  "provider.custom.field.apiKey.label": "API 密钥（可选）",
+  "provider.custom.field.apiKey.placeholder": "sk-... 或本地模型留空",
+  "provider.custom.field.apiKey.description": "可选。本地模型或通过请求头管理认证时可留空。",
   "provider.custom.models.label": "模型",
   "provider.custom.models.id.label": "ID",
   "provider.custom.models.id.placeholder": "model-id",
diff --git a/packages/opencode/src/cli/cmd/tui/component/dialog-mimo-login.tsx b/packages/opencode/src/cli/cmd/tui/component/dialog-mimo-login.tsx
index 0c92e7f4..ded8e65e 100644
--- a/packages/opencode/src/cli/cmd/tui/component/dialog-mimo-login.tsx
+++ b/packages/opencode/src/cli/cmd/tui/component/dialog-mimo-login.tsx
@@ -197,7 +197,7 @@ function MimoOAuthFlow(props: { url: string; instructions: string }) {
             <text fg={theme.primary}>{props.url}</text>
           </Show>
           <Show when={props.instructions}>
-            <text fg={theme.textMuted}>{props.instructions}</text>
+            <text fg={theme.textMuted}>{t("tui.dialog.login.flow.instructions")}</text>
           </Show>
           <text fg={theme.textMuted}>{t("tui.dialog.login.flow.waiting")}</text>
         </box>
diff --git a/packages/opencode/src/cli/cmd/tui/component/dialog-model.tsx b/packages/opencode/src/cli/cmd/tui/component/dialog-model.tsx
index a7d1a248..a6f55cb0 100644
--- a/packages/opencode/src/cli/cmd/tui/component/dialog-model.tsx
+++ b/packages/opencode/src/cli/cmd/tui/component/dialog-model.tsx
@@ -200,7 +200,6 @@ export function DialogModel(props: { providerID?: string }) {
       ]}
       onFilter={setQuery}
       flat={true}
-      skipFilter={true}
       title={title()}
       current={local.model.current()}
     />
diff --git a/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx b/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
index d04725fa..d34fc35c 100644
--- a/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
+++ b/packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
@@ -1541,7 +1541,11 @@ export function Prompt(props: PromptProps) {
                 // Normalize line endings at the boundary
                 // Windows ConPTY/Terminal often sends CR-only newlines in bracketed paste
                 // Replace CRLF first, then any remaining CR
-                const normalizedText = decodePasteBytes(event.bytes).replace(/\r\n/g, "\n").replace(/\r/g, "\n")
+                const normalizedText = decodePasteBytes(event.bytes)
+                  // Some terminals prepend a literal "Paste" label before bracketed paste data
+                  .replace(/^Paste\r?\n?/, "")
+                  .replace(/\r\n/g, "\n")
+                  .replace(/\r/g, "\n")
 
                 // Windows Terminal <1.25 can surface image-only clipboard as an
                 // empty bracketed paste. Windows Terminal 1.25+ does not.
@@ -1686,7 +1690,8 @@ export function Prompt(props: PromptProps) {
                 {(() => {
                   const busyMessage = createMemo(() => {
                     const s = status()
-                    return s.type === "busy" ? s.message : undefined
+                    if (s.type !== "busy" || !s.message) return undefined
+                    return s.message.length > 60 ? s.message.slice(0, 60) + "..." : s.message
                   })
                   return (
                     <Show when={busyMessage()}>
diff --git a/packages/opencode/src/cli/cmd/tui/i18n/en.ts b/packages/opencode/src/cli/cmd/tui/i18n/en.ts
index 81c4b679..83e553a7 100644
--- a/packages/opencode/src/cli/cmd/tui/i18n/en.ts
+++ b/packages/opencode/src/cli/cmd/tui/i18n/en.ts
@@ -383,6 +383,7 @@ export const dict: Record<string, string> = {
   "tui.dialog.login.flow.manual_hint": "Browser didn't open? Visit manually:",
   "tui.dialog.login.flow.waiting": "Waiting for browser authorization...",
   "tui.dialog.login.flow.invalid_code": "Invalid Code, please retry",
+  "tui.dialog.login.flow.instructions": "Complete authorization in the browser, or paste the Code to finish login.",
 
   // Question i18n — plan_exit
   "tui.question.plan_exit.question": "Plan at {{plan}} is complete. Would you like to switch to the build agent and start implementing?",
diff --git a/packages/opencode/src/cli/cmd/tui/i18n/zh.ts b/packages/opencode/src/cli/cmd/tui/i18n/zh.ts
index 68b3f151..fc274091 100644
--- a/packages/opencode/src/cli/cmd/tui/i18n/zh.ts
+++ b/packages/opencode/src/cli/cmd/tui/i18n/zh.ts
@@ -376,6 +376,7 @@ export const dict = {
   "tui.dialog.login.flow.manual_hint": "浏览器未打开？手动访问：",
   "tui.dialog.login.flow.waiting": "等待浏览器授权中...",
   "tui.dialog.login.flow.invalid_code": "Code 无效，请重试",
+  "tui.dialog.login.flow.instructions": "在浏览器中完成授权，或粘贴 Code 完成登录。",
 
   // Question i18n — plan_exit
   "tui.question.plan_exit.question": "{{plan}} 处的计划已完成。是否切换到 build 智能体开始实现？",
diff --git a/packages/opencode/src/plugin/mimo.ts b/packages/opencode/src/plugin/mimo.ts
index bfdd52bc..a356685d 100644
--- a/packages/opencode/src/plugin/mimo.ts
+++ b/packages/opencode/src/plugin/mimo.ts
@@ -99,7 +99,7 @@ export async function MimoAuthPlugin(_input: PluginInput): Promise<Hooks> {
       },
       methods: [
         {
-          label: "浏览器登录",
+          label: "Browser Login",
           type: "oauth" as const,
           authorize: async () => {
             const { publicKey, privateKeyDer } = generateKeyPair()
@@ -159,7 +159,7 @@ export async function MimoAuthPlugin(_input: PluginInput): Promise<Hooks> {
             return {
               url: manualUrl,
               method: "auto" as const,
-              instructions: "在浏览器中完成授权，或粘贴 Code 完成登录。",
+              instructions: "Complete authorization in the browser, or paste the Code to finish login.",
               callback: async (code?: string) => {
                 if (code) {
                   try {
diff --git a/packages/opencode/src/tool/actor.ts b/packages/opencode/src/tool/actor.ts
index 0c773d82..55f29f97 100644
--- a/packages/opencode/src/tool/actor.ts
+++ b/packages/opencode/src/tool/actor.ts
@@ -452,13 +452,27 @@ export const ActorTool = Tool.define(
         // root-level union and passes through unchanged — root keeps exactly one
         // key (`operation`), so models can't drop the discriminator.
         operation: z
-          .discriminatedUnion("action", [
-            runSchema,
-            spawnSchema,
-            statusSchema,
-            waitSchema,
-            cancelSchema,
-            sendSchema,
+          .union([
+            // Handle models that stringify the operation object (#561)
+            z.string().transform((val, ctx) => {
+              try {
+                const parsed = JSON.parse(val)
+                if (parsed && typeof parsed === "object" && !Array.isArray(parsed)) return parsed
+              } catch {}
+              ctx.issues.push({
+                code: z.ZodIssueCode.custom,
+                message: `operation must be a JSON object, got string: "${val.substring(0, 100)}${val.length > 100 ? "..." : ""}"`,
+              })
+              return z.NEVER
+            }),
+            z.discriminatedUnion("action", [
+              runSchema,
+              spawnSchema,
+              statusSchema,
+              waitSchema,
+              cancelSchema,
+              sendSchema,
+            ]),
           ])
           .meta({ type: "object" }),
       })
diff --git a/packages/opencode/src/util/process.ts b/packages/opencode/src/util/process.ts
index 96c35e5d..8a5cfb21 100644
--- a/packages/opencode/src/util/process.ts
+++ b/packages/opencode/src/util/process.ts
@@ -65,6 +65,7 @@ export function spawn(cmd: string[], opts: Options = {}): Child {
     env: opts.env === null ? {} : opts.env ? { ...process.env, ...opts.env } : undefined,
     stdio: [opts.stdin ?? "ignore", opts.stdout ?? "ignore", opts.stderr ?? "ignore"],
     windowsHide: process.platform === "win32",
+    detached: process.platform !== "win32", // Detach on Unix to prevent terminal takeover
   })
 
   let closed = false
diff --git a/packages/opencode/test/plugin/mimo.test.ts b/packages/opencode/test/plugin/mimo.test.ts
index 7f8ba73c..adbc19f7 100644
--- a/packages/opencode/test/plugin/mimo.test.ts
+++ b/packages/opencode/test/plugin/mimo.test.ts
@@ -78,7 +78,7 @@ describe("MimoAuthPlugin", () => {
     test("has one login method", async () => {
       const hooks = await MimoAuthPlugin(fakeInput)
       expect(hooks.auth!.methods).toHaveLength(1)
-      expect(hooks.auth!.methods[0].label).toBe("浏览器登录")
+      expect(hooks.auth!.methods[0].label).toBe("Browser Login")
       expect(hooks.auth!.methods[0].type).toBe("oauth")
     })
   })
diff --git a/packages/ui/src/hooks/use-filtered-list.tsx b/packages/ui/src/hooks/use-filtered-list.tsx
index 2d4e2bdd..aadca6bc 100644
--- a/packages/ui/src/hooks/use-filtered-list.tsx
+++ b/packages/ui/src/hooks/use-filtered-list.tsx
@@ -36,9 +36,9 @@ export function useFilteredList<T>(props: FilteredListProps<T>) {
         (x) => {
           if (!needle) return x
           if (!props.filterKeys && Array.isArray(x) && x.every((e) => typeof e === "string")) {
-            return fuzzysort.go(needle, x).map((x) => x.target) as T[]
+            return fuzzysort.go(needle, x, { threshold: -10000 }).map((x) => x.target) as T[]
           }
-          return fuzzysort.go(needle, x, { keys: props.filterKeys! }).map((x) => x.obj)
+          return fuzzysort.go(needle, x, { keys: props.filterKeys!, threshold: -10000 }).map((x) => x.obj)
         },
         groupBy((x) => (props.groupBy ? props.groupBy(x) : "")),
         entries(),