Fix L119/L151/L153: empty-state copy, range dashes, dismiss aria-labels

L119: Standardized empty-state copy on the "No X yet." pattern. Terminal
      "Output will appear here." -> "No output yet."; Diagnostics
      "No errors logged." -> "No errors yet."

L151: Range-dash convention is ASCII hyphen everywhere. Changed the lone
      en-dash prose range ("2-3 is a good balance") to a hyphen, matching the
      time-range placeholders (1:30-2:00).

L153: The three "Dismiss" close buttons now name what they dismiss --
      "Dismiss suggested link" (DownloadBar + Library suggestion banners) and
      "Dismiss duplicate warning" (DownloadBar dup row).

L95 left open: the Cookies-card "sign in"/"sign-in" usage is already correct
English (verb vs modifier); no change warranted.

typecheck + 242 tests + eslint green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/renderer/src/components/DownloadBar.tsx

@@ -588,7 +588,7 @@ export function DownloadBar(): React.JSX.Element {
             appearance="subtle"
             icon={<DismissRegular />}
             onClick={dismissSuggestion}
-            aria-label="Dismiss"
+            aria-label="Dismiss suggested link"
           />
         </div>
       )}
@@ -605,7 +605,7 @@ export function DownloadBar(): React.JSX.Element {
             appearance="subtle"
             icon={<DismissRegular />}
             onClick={() => setDup(null)}
-            aria-label="Dismiss"
+            aria-label="Dismiss duplicate warning"
           />
         </div>
       )}

src/renderer/src/components/LibraryView.tsx

@@ -541,7 +541,7 @@ export function LibraryView(): React.JSX.Element {
             appearance="subtle"
             icon={<DismissRegular />}
             onClick={clip.dismiss}
-            aria-label="Dismiss"
+            aria-label="Dismiss suggested link"
           />
         </div>
       )}

src/renderer/src/components/SettingsView.tsx

@@ -536,7 +536,7 @@ export function SettingsView(): React.JSX.Element {
 
         <Field
           label="Maximum simultaneous downloads"
-          hint="How many downloads run at once. 2–3 is a good balance."
+          hint="How many downloads run at once. 2-3 is a good balance."
         >
           <SpinButton
             value={maxConcurrent}
@@ -1002,7 +1002,7 @@ export function SettingsView(): React.JSX.Element {
         </div>
 
         {errorEntries.length === 0 ? (
-          <Caption1 className={styles.hint}>No errors logged.</Caption1>
+          <Caption1 className={styles.hint}>No errors yet.</Caption1>
         ) : (
           <div className={styles.errorList}>
             {errorEntries.slice(0, 20).map((e) => (

src/renderer/src/components/TerminalView.tsx

@@ -205,7 +205,7 @@ export function TerminalView(): React.JSX.Element {
 
       <pre className={styles.log} ref={logRef}>
         {lines.length === 0 ? (
-          <span className={styles.empty}>Output will appear here.</span>
+          <span className={styles.empty}>No output yet.</span>
         ) : (
           lines.map((l) => (
             <div key={l.id} className={lineClass(l.kind)}>