Align error logging with admin dashboard field conventions

All warn/error log calls now use field names the dashboard's decorate()
function recognizes: `code` for the error code pill, `httpStatus` for the
status badge and severity bucket, `url` for the sidebar link, and
`repoId` for the repository link.

Key changes:
- Streamer errors surface code, httpStatus, url, and nested err in Raw tab
- Nested `{ err: serializeError(e) }` replaced with spread pattern so
  error fields (name, message, status) appear at the top level
- Raw Error objects in catch blocks now go through serializeError()
- Rate limit, token, and PR 404 warnings include code + httpStatus
- Dashboard stack walker traverses both `cause` and `err` chains
- Dashboard Raw tab renders repoId, filePath, upstream*, err, and cause
- trimRawArg recursively trims stacks in nested err/cause chains
- clampPayload strips heavy nested fields before falling back to
  truncated placeholder, preserving flat diagnostic fields

public/script/admin.js

@@ -984,13 +984,16 @@ angular
           e._method = detail.method || null;
           e._repoId = detail.repoId || detail.detail || null;
           e._detail = detail.detail && detail.detail !== e._repoId ? detail.detail : null;
-          // Walk into `cause` to surface the deepest stack — for unhandled
-          // errors the inner cause is usually the actual JS error frame.
+          // Walk into `cause` (and `err` for streamer-style entries) to
+          // surface the deepest stack.
           let s = typeof detail.stack === "string" ? detail.stack : null;
-          let c = detail.cause;
-          while (!s && c && typeof c === "object") {
-            if (typeof c.stack === "string") s = c.stack;
-            c = c.cause;
+          var roots = [detail.cause, detail.err].filter(Boolean);
+          for (var ri = 0; !s && ri < roots.length; ri++) {
+            var c = roots[ri];
+            while (!s && c && typeof c === "object") {
+              if (typeof c.stack === "string") s = c.stack;
+              c = c.cause;
+            }
           }
           e._stack = s;
         } else {
@@ -1037,7 +1040,13 @@ angular
           }
         }
         push("detail", detailValue);
+        push("repoId", detail && detail.repoId);
+        push("filePath", detail && detail.filePath);
+        push("upstreamStatus", detail && detail.upstreamStatus);
+        push("upstreamBody", detail && detail.upstreamBody);
         push("url", entry._url);
+        push("err", detail && detail.err);
+        push("cause", detail && !detail.err && detail.cause);
         push("ts", entry.ts);
         if (!fields.length) return JSON.stringify(entry, null, 2);
         const keyW = fields.reduce((w, f) => Math.max(w, f[0].length), 0);

src/core/AnonymizedFile.ts

@@ -69,10 +69,15 @@ function streamerErrorToAnonymous(
   }
 
   logger.warn("streamer fetch failed", {
+    code: errCode,
+    httpStatus,
     repoId: context.repoId,
     filePath: context.filePath,
     upstreamStatus,
     upstreamBody: upstreamBody?.slice(0, 500),
+    url: config.STREAMER_ENTRYPOINT
+      ? join(config.STREAMER_ENTRYPOINT, "api")
+      : undefined,
     err: serializeError(err),
   });
 

src/core/Gist.ts

@@ -63,7 +63,7 @@ export default class Gist {
       try {
         return this._model.source.accessToken;
       } catch {
-        logger.warn("invalid token", { gistId: this._model.source.gistId });
+        logger.warn("invalid token", { code: "invalid_token", httpStatus: 401, gistId: this._model.source.gistId });
       }
     }
     return config.GITHUB_TOKEN;

src/core/GitHubUtils.ts

@@ -62,6 +62,8 @@ export function octokit(token: string) {
     throttle: {
       onRateLimit: (retryAfter, options, _o, retryCount) => {
         logger.warn("github primary rate limit hit", {
+          code: "github_rate_limit",
+          httpStatus: 429,
           method: options.method,
           url: options.url,
           retryAfter,
@@ -73,6 +75,8 @@ export function octokit(token: string) {
       },
       onSecondaryRateLimit: (retryAfter, options, _o, retryCount) => {
         logger.warn("github secondary rate limit hit", {
+          code: "github_secondary_rate_limit",
+          httpStatus: 429,
           method: options.method,
           url: options.url,
           retryAfter,
@@ -193,8 +197,9 @@ export async function getToken(repository: Repository) {
         }
       }
       logger.warn("token refresh failed; falling back", {
+        code: "token_refresh_failed",
+        httpStatus: res.status,
         username: repository.owner.model.username,
-        status: res.status,
       });
       // fall through to the checkToken path / config.GITHUB_TOKEN
     }

src/core/PullRequest.ts

@@ -43,6 +43,8 @@ export default class PullRequest {
         return this._model.source.accessToken;
       } catch {
         logger.warn("invalid token", {
+          code: "invalid_token",
+          httpStatus: 401,
           pullRequestId: this._model.source.pullRequestId,
         });
       }
@@ -92,6 +94,8 @@ export default class PullRequest {
       }> => {
         if ((err as { status?: number }).status === 404) {
           logger.warn("PR comments 404, continuing without them", {
+            code: "pr_comments_not_found",
+            httpStatus: 404,
             pr: `${owner}/${repo}#${pull_number}`,
           });
           return [];
@@ -104,6 +108,8 @@ export default class PullRequest {
     ).catch((err) => {
       if (err instanceof HTTPError && err.response.statusCode === 404) {
         logger.warn("PR diff 404, continuing without it", {
+          code: "pr_diff_not_found",
+          httpStatus: 404,
           pr: `${owner}/${repo}#${pull_number}`,
         });
         return { body: "" };

src/core/logger.ts

@@ -101,13 +101,20 @@ function trimStack(s: unknown): unknown {
   }
   return s;
 }
+function trimErrorLike(o: Record<string, unknown>): Record<string, unknown> {
+  const out = { ...o };
+  if (typeof out.stack === "string") out.stack = trimStack(out.stack);
+  if (out.cause && typeof out.cause === "object") {
+    out.cause = trimErrorLike(out.cause as Record<string, unknown>);
+  }
+  if (out.err && typeof out.err === "object") {
+    out.err = trimErrorLike(out.err as Record<string, unknown>);
+  }
+  return out;
+}
 function trimRawArg(a: unknown): unknown {
   if (!a || typeof a !== "object") return a;
-  const o = a as Record<string, unknown>;
-  if (typeof o.stack === "string") {
-    return { ...o, stack: trimStack(o.stack) };
-  }
-  return o;
+  return trimErrorLike(a as Record<string, unknown>);
 }
 
 function clampPayload(entry: {
@@ -127,8 +134,21 @@ function clampPayload(entry: {
   entry.raw = entry.raw.slice(0, 1);
   s = JSON.stringify(entry);
   if (s.length <= MAX_PAYLOAD_BYTES) return s;
-  // Step 2: replace the payload with a placeholder so the entry still shows
-  // up in the list but doesn't blow the cap.
+  // Step 2: strip heavy nested fields (err, cause, upstreamBody) but keep
+  // the flat diagnostic fields (code, httpStatus, repoId, url, …).
+  const first = entry.raw[0];
+  if (first && typeof first === "object" && !Array.isArray(first)) {
+    const slim = { ...(first as Record<string, unknown>) };
+    delete slim.err;
+    delete slim.cause;
+    delete slim.stack;
+    delete slim.upstreamBody;
+    entry.raw = [slim];
+    s = JSON.stringify(entry);
+    if (s.length <= MAX_PAYLOAD_BYTES) return s;
+  }
+  // Step 3: nothing left to trim — replace with a placeholder so the entry
+  // still shows up in the list.
   entry.raw = [{ truncated: true, originalBytes: s.length }];
   return JSON.stringify(entry);
 }

src/core/storage/S3.ts

@@ -132,7 +132,7 @@ export default class S3Storage extends StorageBase {
       try {
         res.status(500).json({ error: "file_not_found" });
       } catch (err) {
-        logger.error("send failed", { path, err: serializeError(err) });
+        logger.error("send failed", { ...serializeError(err), filePath: path });
       }
     }
   }

src/server/index.ts

@@ -269,10 +269,10 @@ export default async function start() {
   app.listen(config.PORT);
   logger.info("server started", { port: config.PORT });
   ensureTodaySnapshot().catch((err) =>
-    logger.error("ensureTodaySnapshot failed", { err })
+    logger.error("ensureTodaySnapshot failed", serializeError(err))
   );
   recoverStuckPreparing().catch((err) =>
-    logger.error("recoverStuckPreparing failed", { err })
+    logger.error("recoverStuckPreparing failed", serializeError(err))
   );
 }