diff --git a/packages/web/src/components/ui/option-menu.tsx b/packages/web/src/components/ui/option-menu.tsx
index f2bf3d4..8f81764 100644
--- a/packages/web/src/components/ui/option-menu.tsx
+++ b/packages/web/src/components/ui/option-menu.tsx
@@ -43,6 +43,11 @@ export interface OptionMenuChoice<T extends string> {
 
 const PANEL_WIDTH = 288; // w-72
 
+/** Row-title text follows the control's size tier, so the dropdown reads exactly like an Input of the same tier (review: dropdown text = input text); descriptions stay text-xs secondary. */
+const rowTextClass: Record<ControlSize, string> = { base: "text-base", sm: "text-xs" };
+/** Descriptions keep one step below the row title at every tier, so the title/description hierarchy survives the sm tier's text-xs titles. */
+const rowDescClass: Record<ControlSize, string> = { base: "text-xs", sm: "text-[11px]" };
+
 export function OptionMenu<T extends string>({
   options,
   value,
@@ -143,7 +148,7 @@ export function OptionMenu<T extends string>({
               >
                 <span className="flex items-center justify-between gap-2">
                   <span
-                    className={`text-sm ${
+                    className={`${rowTextClass[size]} ${
                       opt.value === value
                         ? "font-medium text-gray-900 dark:text-gray-100"
                         : "text-gray-700 dark:text-gray-300"
@@ -170,7 +175,9 @@ export function OptionMenu<T extends string>({
                     </svg>
                   )}
                 </span>
-                <span className="mt-0.5 block text-xs text-gray-500 dark:text-gray-400">
+                <span
+                  className={`mt-0.5 block ${rowDescClass[size]} text-gray-500 dark:text-gray-400`}
+                >
                   {opt.description}
                 </span>
               </button>
diff --git a/packages/web/src/components/ui/select.tsx b/packages/web/src/components/ui/select.tsx
index 3f9738a..f0f166a 100644
--- a/packages/web/src/components/ui/select.tsx
+++ b/packages/web/src/components/ui/select.tsx
@@ -48,6 +48,9 @@ const CONTROL_CLASS =
   "dark:border-gray-700 dark:bg-gray-900 dark:text-gray-100 dark:hover:border-gray-600 " +
   "dark:focus:border-gray-400 dark:focus:ring-gray-500/30";
 
+/** Menu-row text follows the control's size tier, so the dropdown reads exactly like an Input of the same tier (review: dropdown text = input text). */
+const menuTextClass: Record<ControlSize, string> = { base: "text-base", sm: "text-xs" };
+
 export function Select({
   label,
   hint,
@@ -169,7 +172,7 @@ export function Select({
                   aria-selected={o.value === current}
                   disabled={o.disabled}
                   onClick={() => pick(o.value)}
-                  className={`flex w-full items-center px-3 py-1.5 text-left text-sm transition-colors duration-150 disabled:opacity-50 ${
+                  className={`flex w-full items-center px-3 py-1.5 text-left ${menuTextClass[size]} transition-colors duration-150 disabled:opacity-50 ${
                     o.value === current
                       ? "bg-gray-100 font-medium text-gray-900 dark:bg-gray-800 dark:text-gray-100"
                       : "text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-800"
diff --git a/packages/web/src/components/ui/switch.tsx b/packages/web/src/components/ui/switch.tsx
new file mode 100644
index 0000000..f3a6af7
--- /dev/null
+++ b/packages/web/src/components/ui/switch.tsx
@@ -0,0 +1,44 @@
+/**
+ * iOS-style toggle switch: a `button` with `role="switch"` + `aria-checked` (a native
+ * button is keyboard-operable out of the box — Space/Enter activate it — and is labelable
+ * content, so clicking an enclosing `<label>`'s text toggles it too). Sliding knob with a
+ * color/transform transition; the on-state follows the theme accent variable (same source
+ * as Button primary), the off-state is gray; dark-mode aware; disabled dims and blocks.
+ * Sized for compact (sm) form rows, matching the dialogs' controls.
+ */
+import type { ButtonHTMLAttributes } from "react";
+
+export interface SwitchProps extends Omit<
+  ButtonHTMLAttributes<HTMLButtonElement>,
+  "onChange" | "type" | "role"
+> {
+  checked: boolean;
+  onChange: (checked: boolean) => void;
+}
+
+export function Switch({ checked, onChange, disabled, className, ...rest }: SwitchProps) {
+  return (
+    <button
+      type="button"
+      role="switch"
+      aria-checked={checked}
+      disabled={disabled}
+      onClick={() => onChange(!checked)}
+      className={
+        "relative inline-flex h-5 w-9 shrink-0 items-center rounded-full " +
+        "transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-gray-400/30 " +
+        "disabled:cursor-not-allowed disabled:opacity-60 " +
+        (checked ? "bg-[var(--accent-bg)]" : "bg-gray-300 dark:bg-gray-600") +
+        ` ${className ?? ""}`
+      }
+      {...rest}
+    >
+      <span
+        aria-hidden
+        className={`inline-block size-4 transform rounded-full bg-white shadow transition-transform duration-200 ${
+          checked ? "translate-x-[18px]" : "translate-x-0.5"
+        }`}
+      />
+    </button>
+  );
+}
diff --git a/packages/web/src/features/agents/agent-settings-page.tsx b/packages/web/src/features/agents/agent-settings-page.tsx
index 1d0702e..c7a6bf9 100644
--- a/packages/web/src/features/agents/agent-settings-page.tsx
+++ b/packages/web/src/features/agents/agent-settings-page.tsx
@@ -35,16 +35,69 @@ import { thinkingLevelOptionsFor } from "../chat/thinking-level";
 
 type TabKey = "overview" | "prompt" | "runtime" | "tools" | "vault" | "schedules";
 
-/** "" represents not overridden (falls back to the current config), corresponding to the defaultValue placeholder row. */
-function withDefaultOption(
+/**
+ * Dropdown rows from a dictionary's [value, description] pairs (exported for unit tests).
+ * The "" (not-overridden / inherit) row is filtered out per review — the menus offer only
+ * concrete values in dictionary order, the user picks explicitly. An unset stored value
+ * simply matches no row, so the OptionMenu trigger falls back to its placeholder
+ * (（缺省）/(default), the same convention as the tools-table permission menu); nothing is
+ * ever written silently, and the reset link next to each menu rewinds a local pick back to "".
+ */
+export function optionRows(
   entries: ReadonlyArray<readonly [string, string]>,
 ): ReadonlyArray<OptionMenuChoice<string>> {
-  return entries.map(([value, description]) => ({
-    value,
-    triggerLabel: value || S.agent.defaultValue,
-    label: value || S.agent.defaultValue,
-    description,
-  }));
+  return entries
+    .filter(([value]) => value !== "")
+    .map(([value, description]) => ({
+      value,
+      triggerLabel: value,
+      label: value,
+      description,
+    }));
+}
+
+/**
+ * OptionMenu whose pick can be explicitly rewound: the runtime menus no longer offer an
+ * inherit row, so without this an accidental pick could not be backed out before saving.
+ * The reset link (top-right of the label line, visible only while a value is picked) sets
+ * the LOCAL edit state back to "" — the save guard skips empty values, nothing is written.
+ * The unset trigger shows the (default) placeholder, matching the tools-table permission menu.
+ */
+function ResettableOptionMenu({
+  label,
+  value,
+  onChange,
+  options,
+}: {
+  label: string;
+  value: string;
+  onChange: (value: string) => void;
+  options: ReadonlyArray<OptionMenuChoice<string>>;
+}) {
+  return (
+    <div className="relative">
+      <OptionMenu
+        label={label}
+        fullWidth
+        size="sm"
+        placeholder={S.agent.defaultValue}
+        value={value}
+        onChange={onChange}
+        options={options}
+      />
+      {value !== "" && (
+        <button
+          type="button"
+          title={S.agent.resetToDefault}
+          aria-label={S.agent.resetToDefault}
+          onClick={() => onChange("")}
+          className="absolute right-0 top-0 text-xs text-gray-400 transition-colors duration-150 hover:text-gray-700 dark:hover:text-gray-300"
+        >
+          {S.agent.resetToDefault}
+        </button>
+      )}
+    </div>
+  );
 }
 
 /** Numeric input's string state → number (empty/invalid = undefined, meaning no change). */
@@ -501,17 +554,18 @@ function RuntimeTab({ data, onSave }: { data: AgentConfigResponse; onSave: SaveF
   };
 
   // S is reassigned on language switch (live binding), so read it during render rather than hoisting to a module-level constant.
-  // "none" is no longer offered (many models cannot disable thinking) but stays a valid stored
-  // value: assembly lives in thinkingLevelOptionsFor, gated on the **persisted** config — a
-  // misclick onto another tier keeps the legacy row until the change is actually saved, so the
-  // stored value stays reachable (see thinking-level.ts).
+  // Thinking level composes both review rounds: the "" inherit row is filtered (the user picks
+  // explicitly; unset shows the (default) placeholder and the reset link rewinds to it), "none"
+  // is no longer offered (many models cannot disable thinking) but stays a valid stored value —
+  // when the **persisted** config carries it, a display-only legacy row is appended, so a
+  // misclick onto another tier keeps it reachable until the change is actually saved
+  // (see thinking-level.ts).
   const thinkingLevelOptions = thinkingLevelOptionsFor(
     S.agent.thinkingLevelOptions,
-    S.agent.defaultValue,
     S.agent.thinkingLevelNoneKept,
     cfg.model?.thinkingLevel,
   );
-  const compactionModeOptions = withDefaultOption(S.agent.compactionModeOptions);
+  const compactionModeOptions = optionRows(S.agent.compactionModeOptions);
 
   return (
     <div className="space-y-4">
@@ -534,10 +588,8 @@ function RuntimeTab({ data, onSave }: { data: AgentConfigResponse; onSave: SaveF
               inputMode="numeric"
               className="font-mono"
             />
-            <OptionMenu
+            <ResettableOptionMenu
               label={S.agent.thinkingLevel}
-              fullWidth
-              size="sm"
               value={thinkingLevel}
               onChange={setThinkingLevel}
               options={thinkingLevelOptions}
@@ -577,10 +629,8 @@ function RuntimeTab({ data, onSave }: { data: AgentConfigResponse; onSave: SaveF
               inputMode="numeric"
               className="font-mono"
             />
-            <OptionMenu
+            <ResettableOptionMenu
               label={S.agent.compactionMode}
-              fullWidth
-              size="sm"
               value={mode}
               onChange={setMode}
               options={compactionModeOptions}
diff --git a/packages/web/src/features/chat/thinking-level.ts b/packages/web/src/features/chat/thinking-level.ts
index 6d0ef4d..50bbf1c 100644
--- a/packages/web/src/features/chat/thinking-level.ts
+++ b/packages/web/src/features/chat/thinking-level.ts
@@ -41,7 +41,7 @@ export function thinkingLevelLabel(
 /** One dropdown row of the agent-settings thinking-level menu (shape of OptionMenuChoice<string>). */
 export interface ThinkingLevelOptionRow {
   value: string;
-  /** Compact text on the trigger button ("" renders the localized default tag). */
+  /** Compact text on the trigger button. */
   triggerLabel: string;
   /** Panel row title. */
   label: string;
@@ -51,25 +51,30 @@ export interface ThinkingLevelOptionRow {
 
 /**
  * Assembles the agent-settings thinking-level dropdown rows from the dictionary's
- * [value, description] pairs (which no longer include `none`). Backward compatibility:
- * when the **persisted** config already stores `none` (a legacy value), a display-only
- * row for it is appended — the trigger shows the real stored state instead of "—" and
- * nothing is silently rewritten. Gating on the persisted value (not the local edit
- * state) means a misclick onto another tier keeps the row until the change is actually
- * saved, so the user can always click back to the value still stored on disk.
+ * [value, description] pairs, composing both review decisions:
+ * - the "" (inherit) row is **filtered** — the menu offers only concrete tiers, the user
+ *   picks explicitly; an unset value shows the OptionMenu's (default) placeholder and the
+ *   reset link next to the menu rewinds a local pick back to it;
+ * - `none` is no longer offered (many models cannot disable thinking) but stays a valid
+ *   stored value: when the **persisted** config already carries it, a display-only row is
+ *   appended — the trigger shows the real stored state and nothing is silently rewritten.
+ *   Gating on the persisted value (not the local edit state) means a misclick onto another
+ *   tier keeps the row until the change is actually saved, so the user can always click
+ *   back to the value still stored on disk.
  */
 export function thinkingLevelOptionsFor(
   options: ReadonlyArray<readonly [string, string]>,
-  defaultTag: string,
   noneKeptDescription: string,
   storedLevel: string | undefined,
 ): ThinkingLevelOptionRow[] {
-  const rows = options.map(([value, description]) => ({
-    value,
-    triggerLabel: value || defaultTag,
-    label: value || defaultTag,
-    description,
-  }));
+  const rows = options
+    .filter(([value]) => value !== "")
+    .map(([value, description]) => ({
+      value,
+      triggerLabel: value,
+      label: value,
+      description,
+    }));
   if (storedLevel === "none") {
     rows.push({
       value: "none",
diff --git a/packages/web/src/features/models/models-page.tsx b/packages/web/src/features/models/models-page.tsx
index dbd905b..2eeacff 100644
--- a/packages/web/src/features/models/models-page.tsx
+++ b/packages/web/src/features/models/models-page.tsx
@@ -51,6 +51,7 @@ import { Input } from "../../components/ui/input";
 import { PasswordInput } from "../../components/ui/password-input";
 import { Modal } from "../../components/ui/modal";
 import { Select } from "../../components/ui/select";
+import { Switch } from "../../components/ui/switch";
 import { toastError, toastSuccess } from "../../components/ui/toast";
 import { Badge } from "../../components/ui/badge";
 import { Chevron } from "../../components/ui/chevron";
@@ -1242,17 +1243,7 @@ function ModelDialog({
             {S.models.modelId}
           </span>
           <span className="flex shrink-0 items-baseline gap-2.5">
-            {/* Model homepage (the model's own page; gateway groups have per-model URLs) — only for existing rows, whose identity is settled. */}
-            {row && modelHomepageUrl(row.provider, row.modelId) && (
-              <a
-                href={modelHomepageUrl(row.provider, row.modelId)}
-                target="_blank"
-                rel="noreferrer noopener"
-                className="shrink-0 text-xs text-brand-600 underline-offset-2 hover:underline dark:text-brand-300"
-              >
-                {S.models.homepage} ↗
-              </a>
-            )}
+            {/* The model-homepage entry lives in the dialog header (top-right button); only the "get model ids" provider link stays here. */}
             {dialogProvider?.modelsUrl && (
               <a
                 href={dialogProvider.modelsUrl}
@@ -1368,14 +1359,16 @@ function ModelDialog({
       }
     >
       <div className="space-y-3">
-        {/* Header: logo + display name + badges + upstream id (existing model). */}
+        {/* Header: logo + display name + badges + upstream id (existing model); the model
+            homepage entry lives here as a small secondary button on the right (moved out of
+            the form body — it's a property of the model, not an input). */}
         {!isNew && (
           <div className="flex items-center gap-2.5 rounded-md bg-gray-50 px-3 py-2 dark:bg-gray-800/60">
             <ProviderLogo
               provider={form.provider}
               className="h-6 w-6 shrink-0 text-gray-700 dark:text-gray-300"
             />
-            <div className="flex min-w-0 flex-col">
+            <div className="flex min-w-0 flex-1 flex-col">
               <span className="flex flex-wrap items-center gap-1.5 text-sm font-medium">
                 {form.displayName ?? form.modelId}
                 {isDefault && <Badge tone="brand">{S.models.default}</Badge>}
@@ -1389,6 +1382,31 @@ function ModelDialog({
                 </span>
               )}
             </div>
+            {row && modelHomepageUrl(row.provider, row.modelId) && (
+              <a
+                href={modelHomepageUrl(row.provider, row.modelId)}
+                target="_blank"
+                rel="noreferrer noopener"
+                className="inline-flex shrink-0 items-center gap-1 rounded-md border border-gray-300 bg-white px-2.5 py-1 text-xs font-medium text-gray-800 transition-colors duration-150 hover:bg-gray-50 dark:border-gray-700 dark:bg-gray-900 dark:text-gray-200 dark:hover:bg-gray-800"
+              >
+                {S.models.homepage}
+                {/* External-link glyph (opens in a new tab) */}
+                <svg
+                  width="12"
+                  height="12"
+                  viewBox="0 0 24 24"
+                  fill="none"
+                  stroke="currentColor"
+                  strokeWidth="2"
+                  strokeLinecap="round"
+                  strokeLinejoin="round"
+                  aria-hidden
+                  className="shrink-0"
+                >
+                  <path d="M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6M15 3h6v6M10 14 21 3" />
+                </svg>
+              </a>
+            )}
           </div>
         )}
 
@@ -1508,100 +1526,110 @@ function ModelDialog({
           {...(fieldErrors.baseUrl ? { error: fieldErrors.baseUrl } : {})}
         />
 
-        {/* 3) Context window: unit on the right inside the input */}
-        <label className="block">
-          <span className="mb-1 block text-xs font-semibold text-gray-600 dark:text-gray-400">
-            {S.models.contextWindow}
-          </span>
-          <span className="relative block">
-            <Input
-              size="sm"
-              value={form.contextWindow}
-              inputMode="numeric"
-              disabled={!canEdit}
-              invalid={Boolean(fieldErrors.contextWindow)}
-              onChange={(e) => set({ contextWindow: digitsOnly(e.target.value) })}
-              className="pr-14 font-mono"
-              placeholder={
-                preset
-                  ? S.models.contextWindowHint
-                  : S.models.contextWindowDefaultHint(CUSTOM_CONTEXT_DEFAULT)
-              }
-            />
-            <span className="pointer-events-none absolute inset-y-0 right-2 flex items-center text-xs text-gray-400">
-              {S.models.contextWindowUnit}
+        {/* 3) Context window + max output tokens side by side (one row): the "Token" unit
+            sits inside each box as a muted right suffix. Placeholders cannot scroll, so at
+            this half width they carry only a short line; the full explanation lives in the
+            input's title (hover) — the owner explicitly prefers saving the vertical space
+            over a visible hint line. Only field errors appear under a cell. Max output
+            tokens: per-model cap on the request's output — when set it wins over the
+            Agent's system_config value; empty inherits it (lets a small-context local
+            model stay under its window). */}
+        <div className="grid grid-cols-2 items-start gap-2">
+          <label className="block">
+            <span className="mb-1 block text-xs font-semibold text-gray-600 dark:text-gray-400">
+              {S.models.contextWindow}
             </span>
-          </span>
-          {fieldErrors.contextWindow && <FieldError text={fieldErrors.contextWindow} />}
-        </label>
-
-        {/* 4) Max output tokens: per-model cap on the request's output — when set it wins
-            over the Agent's system_config value; empty inherits it. Lets a small-context
-            local model stay under its window (the per-Agent default may not fit). */}
-        <label className="block">
-          <span className="mb-1 block text-xs font-semibold text-gray-600 dark:text-gray-400">
-            {S.models.maxTokens}
-          </span>
-          <Input
-            size="sm"
-            value={form.maxTokens}
-            inputMode="numeric"
-            disabled={!canEdit}
-            invalid={Boolean(fieldErrors.maxTokens)}
-            onChange={(e) => set({ maxTokens: digitsOnly(e.target.value) })}
-            className="font-mono"
-            placeholder={S.models.maxTokensHint}
-          />
-          {fieldErrors.maxTokens ? (
-            <FieldError text={fieldErrors.maxTokens} />
-          ) : (
-            <span className="mt-1 block text-xs text-gray-400 dark:text-gray-500">
-              {S.models.maxTokensCapHint}
+            <span className="relative block">
+              <Input
+                size="sm"
+                value={form.contextWindow}
+                inputMode="numeric"
+                disabled={!canEdit}
+                invalid={Boolean(fieldErrors.contextWindow)}
+                onChange={(e) => set({ contextWindow: digitsOnly(e.target.value) })}
+                className="pr-12 font-mono"
+                // The title mirrors the placeholder: at half width the (EN) copy can clip, hover reveals it in full.
+                title={
+                  preset
+                    ? S.models.contextWindowHint
+                    : S.models.contextWindowDefaultHint(CUSTOM_CONTEXT_DEFAULT)
+                }
+                placeholder={
+                  preset
+                    ? S.models.contextWindowHint
+                    : S.models.contextWindowDefaultHint(CUSTOM_CONTEXT_DEFAULT)
+                }
+              />
+              <span className="pointer-events-none absolute inset-y-0 right-2 flex items-center text-xs text-gray-400">
+                {S.models.tokenUnit}
+              </span>
             </span>
-          )}
-        </label>
-
-        {/* 5) Pricing: three fields side by side; currency and unit (/M tok) both
-            shown inside the input, no need to repeat in the title. */}
-        <div>
-          <p className="mb-1.5 text-xs font-semibold text-gray-600 dark:text-gray-400">
-            {S.models.pricing}
-          </p>
-          {/* Errors land right under the offending field (which is also outlined red): with three fields side by side, only sticking close to the field makes clear which one it is. */}
-          <div className="grid grid-cols-3 items-start gap-2">
-            {(
-              [
-                ["cacheRead", S.models.priceCacheRead, form.cacheRead],
-                ["cacheWrite", S.models.priceCacheWrite, form.cacheWrite],
-                ["output", S.models.priceOutput, form.output],
-              ] as Array<[keyof FieldErrors & keyof RowState, string, string]>
-            ).map(([key, label, value]) => (
-              <label key={key} className="block">
-                <span className="mb-1 block text-xs text-gray-500 dark:text-gray-400">{label}</span>
-                <span className="relative block">
-                  <span className="pointer-events-none absolute inset-y-0 left-2 flex items-center text-xs text-gray-400">
-                    {CURRENCY_SYMBOL[currency]}
-                  </span>
-                  <Input
-                    size="sm"
-                    value={value}
-                    inputMode="decimal"
-                    disabled={!canEdit}
-                    invalid={Boolean(fieldErrors[key])}
-                    onChange={(e) => set({ [key]: decimalOnly(e.target.value) })}
-                    className="pl-4 pr-11 text-right font-mono"
-                  />
-                  <span className="pointer-events-none absolute inset-y-0 right-2 flex items-center text-xs text-gray-400">
-                    {S.models.priceUnitShort}
-                  </span>
-                </span>
-                {fieldErrors[key] && <FieldError text={fieldErrors[key]} />}
-              </label>
-            ))}
-          </div>
+            {fieldErrors.contextWindow && <FieldError text={fieldErrors.contextWindow} />}
+          </label>
+          <label className="block">
+            <span className="mb-1 block text-xs font-semibold text-gray-600 dark:text-gray-400">
+              {S.models.maxTokens}
+            </span>
+            <span className="relative block">
+              <Input
+                size="sm"
+                value={form.maxTokens}
+                inputMode="numeric"
+                disabled={!canEdit}
+                invalid={Boolean(fieldErrors.maxTokens)}
+                onChange={(e) => set({ maxTokens: digitsOnly(e.target.value) })}
+                className="pr-12 font-mono"
+                // Short placeholder (fits the half-width box); the full explanation incl. the small-context advice is the hover title.
+                title={S.models.maxTokensTitle}
+                placeholder={S.models.maxTokensHint}
+              />
+              <span className="pointer-events-none absolute inset-y-0 right-2 flex items-center text-xs text-gray-400">
+                {S.models.tokenUnit}
+              </span>
+            </span>
+            {fieldErrors.maxTokens && <FieldError text={fieldErrors.maxTokens} />}
+          </label>
         </div>
 
-        {/* 6) Identity: model id (renamable) + display name and group (side by side) */}
+        {/* 4) Pricing: three fields side by side with self-contained labels (… price) — no
+            standalone section heading; currency and unit (/M tok) are shown inside the input.
+            Errors land right under the offending field (which is also outlined red): with
+            three fields side by side, only sticking close to the field makes clear which one it is. */}
+        <div className="grid grid-cols-3 items-start gap-2">
+          {(
+            [
+              ["cacheRead", S.models.priceCacheRead, form.cacheRead],
+              ["cacheWrite", S.models.priceCacheWrite, form.cacheWrite],
+              ["output", S.models.priceOutput, form.output],
+            ] as Array<[keyof FieldErrors & keyof RowState, string, string]>
+          ).map(([key, label, value]) => (
+            <label key={key} className="block">
+              <span className="mb-1 block text-xs font-semibold text-gray-600 dark:text-gray-400">
+                {label}
+              </span>
+              <span className="relative block">
+                <span className="pointer-events-none absolute inset-y-0 left-2 flex items-center text-xs text-gray-400">
+                  {CURRENCY_SYMBOL[currency]}
+                </span>
+                <Input
+                  size="sm"
+                  value={value}
+                  inputMode="decimal"
+                  disabled={!canEdit}
+                  invalid={Boolean(fieldErrors[key])}
+                  onChange={(e) => set({ [key]: decimalOnly(e.target.value) })}
+                  className="pl-4 pr-11 text-right font-mono"
+                />
+                <span className="pointer-events-none absolute inset-y-0 right-2 flex items-center text-xs text-gray-400">
+                  {S.models.priceUnitShort}
+                </span>
+              </span>
+              {fieldErrors[key] && <FieldError text={fieldErrors[key]} />}
+            </label>
+          ))}
+        </div>
+
+        {/* 5) Identity: model id (renamable) + display name and group (side by side) */}
         {!isNew && identityFields}
         {/* Legacy entries carrying a non-openai client_type (historical config): read-only display. */}
         {!isNew && !preset && form.clientType && form.clientType !== "openai" && (
@@ -1610,25 +1638,31 @@ function ModelDialog({
           </p>
         )}
 
-        {/* Vision capability: for preset models it's flagged by the built-in catalog (read-only); custom models can be checked. */}
+        {/* Vision capability: for preset models it's flagged by the built-in catalog (read-only);
+            custom models toggle it here — an iOS-style switch sitting inline right next to the
+            label (per owner: no full-row stretch, no standing explanation text). Only the OFF
+            state shows one small muted line: images are then read via the configured vision
+            proxy model (describe_image). */}
         {!preset && (
           <div>
             <label
-              className={`flex items-center gap-2 text-sm ${canEdit ? "cursor-pointer" : "cursor-not-allowed"}`}
+              className={`inline-flex items-center gap-2 ${canEdit ? "cursor-pointer" : "cursor-not-allowed"}`}
             >
-              <input
-                type="checkbox"
+              <span className="text-xs font-semibold text-gray-600 dark:text-gray-400">
+                {S.models.vision}
+              </span>
+              <Switch
                 checked={form.vision}
                 disabled={!canEdit}
-                onChange={(e) => set({ vision: e.target.checked })}
-                className={canEdit ? "cursor-pointer" : "cursor-not-allowed"}
+                onChange={(vision) => set({ vision })}
+                aria-label={S.models.vision}
               />
-              {S.models.vision}
             </label>
-            {/* Note toggles with the checkbox: supports images → read_image feeds them back directly; doesn't → describe_image reads them on its behalf. */}
-            <p className="mt-1 text-xs text-gray-400">
-              {form.vision ? S.models.visionOnHint : S.models.visionOffHint}
-            </p>
+            {!form.vision && (
+              <p className="mt-1 text-xs text-gray-400 dark:text-gray-500">
+                {S.models.visionOffProxyHint}
+              </p>
+            )}
           </div>
         )}
       </div>
diff --git a/packages/web/src/lib/strings-en.ts b/packages/web/src/lib/strings-en.ts
index df93009..36927f0 100644
--- a/packages/web/src/lib/strings-en.ts
+++ b/packages/web/src/lib/strings-en.ts
@@ -252,6 +252,7 @@ export const en: Strings = {
     toolMaxOutput: "maxOutputLength",
     mcpServers: "MCP Servers (read-only)",
     defaultValue: "(default)",
+    resetToDefault: "Reset to default",
     deleteAgent: "Delete Agent",
     builtinUndeletable: "Built-in Agents cannot be deleted",
     deleteConfirm: (name: string): string =>
@@ -317,16 +318,16 @@ export const en: Strings = {
     displayNameHint: "Defaults to the model ID",
     providerGroup: "Group",
     contextWindow: "Context window",
-    contextWindowUnit: "tokens",
+    tokenUnit: "Token",
     contextWindowHint: "Leave empty if unknown",
     maxTokens: "Max output tokens",
-    maxTokensHint: "Leave empty to inherit the agent setting",
-    maxTokensCapHint: "Caps output tokens per request; lower it for small-context local models",
+    maxTokensHint: "Empty = inherit agent setting",
+    maxTokensTitle:
+      "Caps output tokens per request; leave empty to inherit the agent setting — lower it for small-context models",
     maxTokensInvalid: "Must be a positive integer",
     clientTypeLocked: (t: string): string => `Protocol: ${t} (kept as configured; not editable)`,
-    vision: "Supports image input (vision / multimodal)",
-    visionHint:
-      "When unchecked, chat images are passed as file paths and read via describe_image (vision model)",
+    vision: "Vision support",
+    visionOffProxyHint: "Images are read via the vision proxy model",
     visionBadge: "Vision",
     visionModelBadge: "Proxy vision",
     setVisionModel: "Set as proxy vision model",
@@ -337,10 +338,9 @@ export const en: Strings = {
     testOk: (ms: number): string => `Connected (${ms} ms)`,
     testFailed: (msg: string): string => `Failed: ${msg}`,
     modelIdRenameHint: "Renaming migrates the existing config and API key",
-    priceCacheRead: "Cache read",
-    priceCacheWrite: "Cache write",
-    priceOutput: "Output",
-    pricing: "Pricing",
+    priceCacheRead: "Cache read price",
+    priceCacheWrite: "Cache write price",
+    priceOutput: "Output price",
     priceUnit: "per 1M tokens",
     currency: "Currency",
     currencyUsd: "USD $",
@@ -358,9 +358,6 @@ export const en: Strings = {
     baseUrlHint: "Leave empty to use the provider default",
     baseUrlRequired: "A base URL is required",
     contextWindowDefaultHint: (n: number): string => `Defaults to ${n} if empty`,
-    visionOnHint: "Images are read with read_image and fed to the model directly",
-    visionOffHint:
-      "Images are read with describe_image: described by the proxy vision model, text only; chat uploads are passed as file paths",
     confirmDeleteTitle: "Delete model",
     confirmDelete: (name: string): string =>
       `Delete "${name}"? Its configuration and API key will be removed.`,
diff --git a/packages/web/src/lib/strings.ts b/packages/web/src/lib/strings.ts
index 452ab98..c9a15e3 100644
--- a/packages/web/src/lib/strings.ts
+++ b/packages/web/src/lib/strings.ts
@@ -231,6 +231,8 @@ export const zh = {
     toolMaxOutput: "maxOutputLength",
     mcpServers: "MCP Server（只读）",
     defaultValue: "（缺省）",
+    /** Reset link next to the runtime dropdowns: rewinds the local pick back to "not overridden" (the menus offer no inherit row). */
+    resetToDefault: "恢复缺省",
     deleteAgent: "删除 Agent",
     builtinUndeletable: "内置 Agent 不可被删除",
     deleteConfirm: (name: string): string =>
@@ -292,16 +294,20 @@ export const zh = {
     displayNameHint: "留空则展示模型 ID",
     providerGroup: "分组",
     contextWindow: "上下文窗口",
-    contextWindowUnit: "tokens",
+    /** 单位后缀，显示在上下文窗口/最大输出长度输入框内右侧。 */
+    tokenUnit: "Token",
     contextWindowHint: "留空表示未知",
-    maxTokens: "最大输出长度（Token）",
+    maxTokens: "最大输出长度",
+    /** Placeholders cannot scroll, so this must fit the half-width box; the full guidance is the input's title tooltip (the owner prefers no visible hint line — saves vertical space). */
     maxTokensHint: "留空沿用 Agent 设置",
-    maxTokensCapHint: "限制单次请求的输出 Token 数；小上下文的本地模型建议调低",
+    maxTokensTitle:
+      "按模型限制单次请求的最大输出 Token 数；留空沿用 Agent 设置，小上下文模型建议调低",
     maxTokensInvalid: "必须为正整数",
     clientTypeLocked: (t: string): string => `协议：${t}（沿用原配置，不可修改）`,
-    vision: "支持图片输入（视觉/多模态）",
-    visionHint:
-      "取消勾选后，对话中上传的图片将以文件路径转交，读图经 describe_image 由视觉模型代读",
+    /** Switch label only — the dialog carries no explanation text for it (per owner). */
+    vision: "支持视觉",
+    /** Shown only while the vision switch is OFF: images are then read via the configured vision proxy model (describe_image). */
+    visionOffProxyHint: "使用视觉代理模型读图",
     visionBadge: "视觉",
     visionModelBadge: "视觉代理",
     setVisionModel: "设为视觉代理模型",
@@ -312,10 +318,9 @@ export const zh = {
     testOk: (ms: number): string => `连通正常（${ms} ms）`,
     testFailed: (msg: string): string => `连通失败：${msg}`,
     modelIdRenameHint: "改 id 后原配置与 API key 一并迁移",
-    priceCacheRead: "缓存读取",
-    priceCacheWrite: "缓存写入",
-    priceOutput: "输出",
-    pricing: "价格",
+    priceCacheRead: "缓存读取价格",
+    priceCacheWrite: "缓存写入价格",
+    priceOutput: "输出价格",
     priceUnit: "每百万 Token",
     currency: "币种",
     currencyUsd: "美元 $",
@@ -333,9 +338,6 @@ export const zh = {
     baseUrlHint: "留空使用厂商默认地址",
     baseUrlRequired: "必须填写 base URL",
     contextWindowDefaultHint: (n: number): string => `留空按 ${n} 计`,
-    visionOnHint: "读图用 read_image：图片直接回灌模型",
-    visionOffHint:
-      "读图用 describe_image：图片交给视觉代理模型描述、只回文本；对话中上传的图片以文件路径转交",
     confirmDeleteTitle: "删除模型",
     confirmDelete: (name: string): string =>
       `确定删除「${name}」？该模型的配置与 API key 将一并移除。`,
diff --git a/packages/web/test/agent-settings-options.test.ts b/packages/web/test/agent-settings-options.test.ts
new file mode 100644
index 0000000..d4b27ac
--- /dev/null
+++ b/packages/web/test/agent-settings-options.test.ts
@@ -0,0 +1,34 @@
+/**
+ * agent-settings-page.ts optionRows unit tests: the runtime dropdowns build from the
+ * dictionary's [value, description] pairs with the "" (inherit) row dropped and dictionary
+ * order kept — pinned so a future reconciliation (e.g. with the no-none branch's option
+ * assembly) cannot silently regress the filter.
+ */
+import { describe, expect, it } from "vitest";
+import { optionRows } from "../src/features/agents/agent-settings-page";
+
+const ENTRIES: ReadonlyArray<readonly [string, string]> = [
+  ["", "Send no override."],
+  ["low", "Low tier."],
+  ["medium", "Medium tier."],
+  ["high", "High tier."],
+  ["xhigh", "Extra-high tier."],
+];
+
+describe("optionRows", () => {
+  it("drops the '' inherit row and keeps dictionary order", () => {
+    const rows = optionRows(ENTRIES);
+    expect(rows.map((r) => r.value)).toEqual(["low", "medium", "high", "xhigh"]);
+    expect(rows.some((r) => r.value === "")).toBe(false);
+  });
+
+  it("maps value into both labels and carries the description through", () => {
+    const rows = optionRows([["summarize", "Summarize old context."]]);
+    expect(rows[0]).toEqual({
+      value: "summarize",
+      triggerLabel: "summarize",
+      label: "summarize",
+      description: "Summarize old context.",
+    });
+  });
+});
diff --git a/packages/web/test/thinking-level.test.ts b/packages/web/test/thinking-level.test.ts
index 52a105c..742fd18 100644
--- a/packages/web/test/thinking-level.test.ts
+++ b/packages/web/test/thinking-level.test.ts
@@ -63,18 +63,22 @@ describe("thinkingLevelOptionsFor (agent-settings dropdown assembly)", () => {
     ["xhigh", "Extra-high tier."],
   ];
 
-  it("maps the dictionary in order; the '' row renders the default tag; no none row normally", () => {
+  it("filters the '' inherit row and keeps dictionary order; no none row normally", () => {
     for (const stored of [undefined, "", "medium", "xhigh"]) {
-      const rows = thinkingLevelOptionsFor(OPTIONS, "(default)", "legacy none", stored);
-      expect(rows.map((r) => r.value)).toEqual(["", "low", "medium", "high", "xhigh"]);
-      expect(rows[0]).toMatchObject({ triggerLabel: "(default)", label: "(default)" });
+      const rows = thinkingLevelOptionsFor(OPTIONS, "legacy none", stored);
+      expect(rows.map((r) => r.value)).toEqual(["low", "medium", "high", "xhigh"]);
       expect(rows.some((r) => r.value === "none")).toBe(false);
+      expect(rows[0]).toMatchObject({
+        triggerLabel: "low",
+        label: "low",
+        description: "Low tier.",
+      });
     }
   });
 
   it("appends a display-only none row when the persisted config stores none (backward compat)", () => {
-    const rows = thinkingLevelOptionsFor(OPTIONS, "(default)", "legacy none", "none");
-    expect(rows.map((r) => r.value)).toEqual(["", "low", "medium", "high", "xhigh", "none"]);
+    const rows = thinkingLevelOptionsFor(OPTIONS, "legacy none", "none");
+    expect(rows.map((r) => r.value)).toEqual(["low", "medium", "high", "xhigh", "none"]);
     expect(rows.at(-1)).toEqual({
       value: "none",
       triggerLabel: "none",