diff --git a/src/app/components/image-pack-view/ImageTile.tsx b/src/app/components/image-pack-view/ImageTile.tsx
index 5692c7364..5645e7df5 100644
--- a/src/app/components/image-pack-view/ImageTile.tsx
+++ b/src/app/components/image-pack-view/ImageTile.tsx
@@ -72,6 +72,7 @@ export function ImageTile({
               variant={deleted ? 'Critical' : 'Secondary'}
               fill="None"
               radii="Pill"
+              aria-label={deleted ? 'Undo deletion' : 'Mark for deletion'}
               onClick={() => onDeleteToggle?.(defaultShortcode)}
             >
               {deleted ? <Text size="B300">Undo</Text> : <Icon size="50" src={Icons.Delete} />}
diff --git a/src/app/components/message/content/ImageContent.tsx b/src/app/components/message/content/ImageContent.tsx
index 13868c4bf..74ff98e37 100644
--- a/src/app/components/message/content/ImageContent.tsx
+++ b/src/app/components/message/content/ImageContent.tsx
@@ -144,7 +144,7 @@ export const ImageContent = as<'div', ImageContentProps>(
     useEffect(() => {
       if (!viewer) {
         setViewerFullSrc(null);
-        return;
+        return undefined;
       }
       if (
         typeof matrixThumbnailMaxEdge !== 'number' ||
@@ -152,7 +152,7 @@ export const ImageContent = as<'div', ImageContentProps>(
         encInfo ||
         url.startsWith('http')
       ) {
-        return;
+        return undefined;
       }
       let cancelled = false;
       void (async () => {
@@ -200,7 +200,7 @@ export const ImageContent = as<'div', ImageContentProps>(
       : isContained
         ? { minHeight: containedReserveStrip ? toRem(stripMin) : undefined }
         : hasDimensions
-          ? { aspectRatio: `${info!.w} / ${info!.h}` }
+          ? { aspectRatio: `${info.w} / ${info.h}` }
           : { minHeight: '150px' };
 
     const fillPreviewSlotStyle = fillsSlot
diff --git a/src/app/features/room/MembersDrawer.tsx b/src/app/features/room/MembersDrawer.tsx
index 2641899d4..3aeb18c15 100644
--- a/src/app/features/room/MembersDrawer.tsx
+++ b/src/app/features/room/MembersDrawer.tsx
@@ -296,8 +296,6 @@ export function MembersDrawer({ room, members }: MembersDrawerProps) {
   );
 
   const handleMemberClick: MouseEventHandler<HTMLButtonElement> = (evt) => {
-    // oxlint-disable-next-line no-console
-    console.log(evt);
     const btn = evt.currentTarget as HTMLButtonElement;
     const userId = btn.getAttribute('data-user-id');
     if (!userId) return;
diff --git a/src/app/features/room/RoomCallButton.tsx b/src/app/features/room/RoomCallButton.tsx
index 3c60e5935..34b6c7545 100644
--- a/src/app/features/room/RoomCallButton.tsx
+++ b/src/app/features/room/RoomCallButton.tsx
@@ -25,7 +25,8 @@ export function RoomCallButton({ room }: RoomCallButtonProps) {
     startCall(room, { microphone, video, sound });
     try {
       const now = Date.now();
-      // TODO not use as any one day someday i swear
+      // org.matrix.msc4075.rtc.notification is not yet in the SDK's TimelineEvents union;
+      // cast to keyof TimelineEvents to satisfy sendEvent's overload until MSC4075 lands.
       await mx.sendEvent(
         room.roomId,
         'org.matrix.msc4075.rtc.notification' as keyof TimelineEvents,
diff --git a/src/app/features/room/ThreadDrawer.tsx b/src/app/features/room/ThreadDrawer.tsx
index 070cdaf58..2d53f7c89 100644
--- a/src/app/features/room/ThreadDrawer.tsx
+++ b/src/app/features/room/ThreadDrawer.tsx
@@ -305,7 +305,7 @@ export function ThreadDrawer({ room, threadRootId, onClose, overlay }: ThreadDra
             if (room.getThread(threadRootId)) return; // created concurrently
             room.createThread(threadRootId, new MatrixEvent(rawEvt as IEvent), [], false);
           })
-          .catch(() => {});
+          .catch(console.warn);
       }
     }
 
@@ -347,7 +347,7 @@ export function ThreadDrawer({ room, threadRootId, onClose, overlay }: ThreadDra
 
     mx.paginateEventTimeline(currThread.timelineSet.getLiveTimeline(), { backwards: true })
       .then(() => forceUpdate((n) => n + 1))
-      .catch(() => {});
+      .catch(console.warn);
     // forceUpdateCounter must be in deps so this effect re-runs after
     // ThreadEvent.Update fires (which flips initialEventsFetched from false to
     // true).
diff --git a/src/app/features/settings/Persona/PerMessageProfileEditor.tsx b/src/app/features/settings/Persona/PerMessageProfileEditor.tsx
index f05129eae..ee1c77462 100644
--- a/src/app/features/settings/Persona/PerMessageProfileEditor.tsx
+++ b/src/app/features/settings/Persona/PerMessageProfileEditor.tsx
@@ -45,8 +45,6 @@ export function PerMessageProfileEditor({
   const [currentId, setCurrentId] = useState(profileId);
   const [newId, setNewId] = useState(profileId);
 
-  console.warn(pronouns);
-
   // Pronouns
   const [currentPronouns, setCurrentPronouns] = useState(pronouns);
   const [newPronouns, setNewPronouns] = useState(pronouns);
diff --git a/src/app/features/settings/developer-tools/AccountData.tsx b/src/app/features/settings/developer-tools/AccountData.tsx
index da2169189..726a078a5 100644
--- a/src/app/features/settings/developer-tools/AccountData.tsx
+++ b/src/app/features/settings/developer-tools/AccountData.tsx
@@ -15,14 +15,14 @@ type AccountDataProps = {
 export function AccountData({ expand, onExpandToggle, onSelect }: AccountDataProps) {
   const mx = useMatrixClient();
   const [accountDataTypes, setAccountDataKeys] = useState<string[]>(() =>
-    // TODO: tighten this once account data event typing is standardized.
+    // Account data keys are arbitrary strings (any MSC or custom event); no further narrowing needed.
     Array.from(mx.store.accountData.keys())
   );
 
   useAccountDataCallback(
     mx,
     useCallback(() => {
-      // TODO: tighten this once account data event typing is standardized.
+      // Account data keys are arbitrary strings (any MSC or custom event); no further narrowing needed.
       setAccountDataKeys(Array.from(mx.store.accountData.keys()));
     }, [mx])
   );
diff --git a/src/app/features/settings/developer-tools/DevelopTools.tsx b/src/app/features/settings/developer-tools/DevelopTools.tsx
index 100119726..4dfba7d16 100644
--- a/src/app/features/settings/developer-tools/DevelopTools.tsx
+++ b/src/app/features/settings/developer-tools/DevelopTools.tsx
@@ -28,7 +28,7 @@ export function DeveloperTools({ requestBack, requestClose }: DeveloperToolsProp
 
   const submitAccountData: AccountDataSubmitCallback = useCallback(
     async (type, content) => {
-      // TODO: remove cast once account data typing is unified.
+      // as never: developer tools submit arbitrary account data types beyond the typed enum.
       await mx.setAccountData(type as never, content as never);
     },
     [mx]
@@ -40,7 +40,7 @@ export function DeveloperTools({ requestBack, requestClose }: DeveloperToolsProp
         type={accountDataType ?? undefined}
         content={
           accountDataType
-            ? // TODO: remove cast once account data typing is unified.
+            ? // as never: developer tools read arbitrary account data types beyond the typed enum.
               mx.getAccountData(accountDataType as never)?.getContent()
             : undefined
         }
diff --git a/src/app/plugins/markdown/markdownToHtml.ts b/src/app/plugins/markdown/markdownToHtml.ts
index 8bdc41200..58e3439e9 100644
--- a/src/app/plugins/markdown/markdownToHtml.ts
+++ b/src/app/plugins/markdown/markdownToHtml.ts
@@ -77,7 +77,7 @@ const shieldBareMatrixToLinks = (
 
 const unshieldBareMatrixToLinks = (html: string, placeholders: Map<string, string>): string => {
   let result = html;
-  const keys = [...placeholders.keys()].sort((a, b) => b.length - a.length);
+  const keys = [...placeholders.keys()].toSorted((a, b) => b.length - a.length);
   for (const key of keys) {
     const url = placeholders.get(key);
     if (url) result = result.split(key).join(escapeHtml(url));
diff --git a/src/app/utils/ASCIILexicalTable.ts b/src/app/utils/ASCIILexicalTable.ts
index 93124f160..b302e262e 100644
--- a/src/app/utils/ASCIILexicalTable.ts
+++ b/src/app/utils/ASCIILexicalTable.ts
@@ -239,102 +239,6 @@ export class ASCIILexicalTable {
   }
 }
 
-// const printLex = (lex: ASCIILexicalTable) => {
-//   const padRight = (s: string, maxWidth: number, padding: string): string => {
-//     let ns = s;
-//     for (let i = s.length; i < maxWidth; i += 1) {
-//       ns += padding;
-//     }
-//     return ns;
-//   };
-
-//   const formattedLine = (n: number, item: string): string =>
-//     `|${padRight(n.toString(), lex.size().toString().length, ' ')}|${item}|`;
-
-//   const hr = `|${padRight('-', lex.size().toString().length, '-')}|${padRight(
-//     '-',
-//     lex.maxStrWidth,
-//     '-'
-//   )}|`;
-
-//   console.log(`All lexicographic string combination in order.`);
-//   console.log(`Start ASCII code: "${lex.startCode}"`);
-//   console.log(`End ASCII code: "${lex.endCode}"`);
-//   console.log(`Max string width: ${lex.maxStrWidth}`);
-//   console.log(`Total String Combination Count: ${lex.size()}\n`);
-//   console.log('Table:');
-//   console.log(hr);
-//   for (let i = 0; i < lex.size(); i += 1) {
-//     const str = lex.get(i);
-//     if (str) {
-//       console.log(formattedLine(i, padRight(str, lex.maxStrWidth, '_')));
-//     }
-//   }
-//   console.log(hr);
-// };
-
-// console.log('\n');
-
-// const lex = new ASCIILexicalTable('a'.charCodeAt(0), 'c'.charCodeAt(0), 3);
-// printLex(lex);
-// console.log(lex.size());
-// console.log(lex.nBetween(8, ' ', '~~~~~'));
-// console.log(lex.between('a', 'ccc'));
-// console.log(lex.get(11));
-// console.log(lex.get(11) === 'aaac');
-
-// const lex4 = new ASCIILexicalTable(' '.charCodeAt(0), '~'.charCodeAt(0), 5);
-// console.log('Size: ', lex4.size());
-// console.log('Between: ', lex4.between('7g7g5', 'caccc'));
-// printLex(lex4);
-
-// console.log('\n');
-
-// const perf = () => {
-//   const loopLength = 99999;
-//   const lexT = new ASCIILexicalTable('a'.charCodeAt(0), 'z'.charCodeAt(0), 9);
-//   console.log(lexT.size());
-//   const str = 'bcbba';
-//   const strI = lexT.index(str);
-//   console.log('================');
-//   console.time('index');
-//   console.log(lexT.index(str));
-//   for (let i = 0; i < loopLength; i += 1) {
-//     lexT.index(str);
-//   }
-//   console.timeEnd('index');
-//   console.log('================');
-//   console.time('get');
-//   console.log(lexT.get(strI));
-//   for (let i = 0; i < loopLength; i += 1) {
-//     lexT.get(strI);
-//   }
-//   console.timeEnd('get');
-//   console.log('================');
-//   console.time('previous');
-//   console.log(lexT.previous(str));
-//   for (let i = 0; i < loopLength; i += 1) {
-//     lexT.previous(str);
-//   }
-//   console.timeEnd('previous');
-//   console.log('================');
-//   console.time('next');
-//   console.log(lexT.next(str));
-//   for (let i = 0; i < loopLength; i += 1) {
-//     lexT.next(str);
-//   }
-//   console.timeEnd('next');
-//   console.log('================');
-//   console.time('between');
-//   console.log(lexT.between(str, 'cbbca'));
-//   for (let i = 0; i < loopLength; i += 1) {
-//     lexT.between(str, 'cbbca');
-//   }
-//   console.timeEnd('between');
-// };
-
-// perf();
-
 const findNextFilledKey = (
   fromIndex: number,
   keys: Array<string | undefined>