audit follow-up: reduce warning hotspots in automation and gateway tests

docs/plans/analysis/2026-02-16-codebase-audit-report.md

@@ -20,7 +20,7 @@ Scope: Production-risk-first audit of bugs, code improvements, and feature oppor
 - ✅ F-015 addressed: retry defaults no longer classify timeout-style failures as non-retryable, improving resilience for transient timeout conditions.
 - ✅ F-011 addressed: Slack user-name resolution now uses bounded TTL+LRU caching to prevent unbounded growth.
 - ✅ F-013 addressed: shared channel utilities now cover reset normalization/building plus reusable allowlist, mention-gating, and pairing-gating flows across Discord/Slack/WhatsApp adapters.
-- ◑ F-004 partially addressed: lint error baseline is restored (`pnpm lint` now passes with 0 errors) and warning burn-down has progressed from `466` to `323`; additional warning debt remains.
+- ◑ F-004 partially addressed: lint error baseline is restored (`pnpm lint` now passes with 0 errors) and warning burn-down has progressed from `466` to `247`; additional warning debt remains.
 
 ## Executive Summary
 
@@ -28,7 +28,7 @@ Current health snapshot:
 - `pnpm typecheck`: passing
 - `pnpm build`: passing
 - `pnpm test:run`: passing (`140/140` files, `1773/1773` tests)
-- `pnpm lint`: passing with warnings only (`0 errors`, `323 warnings`)
+- `pnpm lint`: passing with warnings only (`0 errors`, `247 warnings`)
 
 Top conclusions:
 - A critical Web UI security issue exists in markdown rendering (unsanitized HTML insertion).
@@ -126,7 +126,7 @@ Remediation update (2026-02-16):
 - Severity: Medium
 - Impact: CI noise, reduced confidence in static analysis, and slower defect detection.
 - Evidence:
-  - `pnpm -s lint` => `0 errors`, `323 warnings`
+  - `pnpm -s lint` => `0 errors`, `247 warnings`
   - Error concentration:
     - `src/daemon/models.ts` (90 errors)
     - `src/cli/tui.ts` (25 errors)
@@ -145,10 +145,15 @@ Remediation update (2026-02-16):
 
 Remediation update (2026-02-16):
 - Stage 1 complete: fixed all error-level ESLint violations in impacted high-error files so `pnpm lint` now passes with `0` errors.
-- Stage 2 in progress: warning-burn-down reduced to `323` warnings via targeted hotspot cleanup in:
+- Stage 2 in progress: warning-burn-down reduced to `247` warnings via targeted hotspot cleanup in:
   - `src/gateway/handlers/handlers.test.ts`
   - `src/daemon/routing.test.ts`
   - `src/frontends/tui/minimal.test.ts`
+  - `src/gateway/tailscale.test.ts`
+  - `src/automation/webhooks.test.ts`
+  - `src/automation/cron.test.ts`
+  - `src/automation/heartbeat.test.ts`
+  - `src/frontends/tui/minimal.login.test.ts`
 
 ### F-005 Medium: ESLint browser globals mismatch causes avoidable UI lint failures
 
@@ -453,7 +458,7 @@ pnpm -s lint
 
 Observed outcomes:
 - Typecheck/build/test: passing.
-- Lint: passing with warnings only (`0` errors, `323` warnings).
+- Lint: passing with warnings only (`0` errors, `247` warnings).
 
 Historical pre-remediation lint error concentration snapshot:
 - `src/daemon/models.ts`: 90 errors

docs/plans/state.json

@@ -2652,7 +2652,7 @@
       "status": "in_progress",
       "date": "2026-02-16",
       "updated": "2026-02-16",
-      "summary": "Continued stage-2 lint warning reduction with hotspot-focused cleanup in `gateway/handlers/handlers.test.ts`, `daemon/routing.test.ts`, and `frontends/tui/minimal.test.ts`. Replaced broad `any` casts with typed helper casts/unknown-path accessors and removed non-null assertions in routing tests. Warning count reduced from 466 to 323 (143 warnings burned down) with lint/test suites still green.",
+      "summary": "Continued stage-2 lint warning reduction with hotspot-focused cleanup in `gateway/handlers/handlers.test.ts`, `daemon/routing.test.ts`, `frontends/tui/minimal.test.ts`, `gateway/tailscale.test.ts`, `automation/webhooks.test.ts`, `automation/cron.test.ts`, `automation/heartbeat.test.ts`, and `frontends/tui/minimal.login.test.ts`. Replaced broad `any` casts with typed helper casts/unknown-path accessors and removed non-null assertions in high-warning tests. Warning count reduced from 466 to 247 (219 warnings burned down) with lint/test suites still green.",
       "files_modified": [
         "src/tools/builtin/browser/tools.test.ts",
         "src/channels/telegram/adapter.test.ts",
@@ -2662,9 +2662,14 @@
         "src/gateway/handlers/handlers.test.ts",
         "src/daemon/routing.test.ts",
         "src/frontends/tui/minimal.test.ts",
+        "src/gateway/tailscale.test.ts",
+        "src/automation/webhooks.test.ts",
+        "src/automation/cron.test.ts",
+        "src/automation/heartbeat.test.ts",
+        "src/frontends/tui/minimal.login.test.ts",
         "docs/plans/analysis/2026-02-16-codebase-audit-report.md"
       ],
-      "test_status": "pnpm test:run src/channels/utils.test.ts src/channels/discord/adapter.test.ts src/channels/slack/adapter.test.ts src/channels/whatsapp/adapter.test.ts src/daemon/routing.test.ts src/gateway/handlers/handlers.test.ts src/frontends/tui/minimal.test.ts + pnpm lint passing (0 errors, 323 warnings)"
+      "test_status": "pnpm test:run src/channels/utils.test.ts src/channels/discord/adapter.test.ts src/channels/slack/adapter.test.ts src/channels/whatsapp/adapter.test.ts src/daemon/routing.test.ts src/gateway/handlers/handlers.test.ts src/frontends/tui/minimal.test.ts src/gateway/tailscale.test.ts src/automation/webhooks.test.ts src/automation/cron.test.ts src/automation/heartbeat.test.ts src/frontends/tui/minimal.login.test.ts + pnpm lint passing (0 errors, 247 warnings)"
     }
   },
   "overall_progress": {