fix: refresh reboot evidence after external host updates

.github/scripts/run_offline_qualified.py

@@ -18,6 +18,7 @@ PYTHON_FILES = (
     "tests/test_host_update_shell.py",
     "tests/test_host_update_auth.py",
     "tests/test_kernel_reboot.py",
+    "tests/test_reboot_health_refresh.py",
     "tests/test_lxc_update_jobs.py",
     "tests/test_post_install_i18n.py",
     "tests/test_remaining_cli_i18n.py",
@@ -40,6 +41,7 @@ PYTHON_FILES = (
 )
 NODE_FILES = (
     "tests/test_host_update_ui.cjs",
+    "tests/test_reboot_health_refresh.cjs",
     "tests/test_lxc_update_jobs.cjs",
     "tests/test_api_import_boundaries.cjs",
     "tests/test_api_errors.cjs",

AppImage/components/health-status-modal.tsx

@@ -2,7 +2,7 @@
 
 import type React from "react"
 
-import { useState, useEffect, useCallback } from "react"
+import { useState, useEffect, useCallback, useRef } from "react"
 import { getAuthToken } from "@/lib/api-config"
 import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from "@/components/ui/dialog"
 import { Badge } from "@/components/ui/badge"
@@ -132,9 +132,16 @@ export function HealthStatusModal({ open, onOpenChange, getApiUrl }: HealthStatu
   const [showUpdateTerminal, setShowUpdateTerminal] = useState(false)
   const [hostJob, setHostJob] = useState<{ runId: string; resume: boolean; kind: "host" } | null>(null)
   const [hostJobs, setHostJobs] = useState<HostUpdateJob[]>([])
+  const healthRequest = useRef<AbortController | null>(null)
+  const previousAutoExpanded = useRef<Set<string>>(new Set())
 
-  const fetchHealthDetails = useCallback(async (force = false) => {
-    setLoading(true)
+  const fetchHealthDetails = useCallback(async (force = false, cachedOnly = false) => {
+    if (cachedOnly && healthRequest.current) return
+    healthRequest.current?.abort()
+    const controller = new AbortController()
+    healthRequest.current = controller
+    const timeout = cachedOnly ? setTimeout(() => controller.abort(), 10000) : undefined
+    if (!cachedOnly) setLoading(true)
     setError(null)
 
     try {
@@ -147,14 +154,19 @@ export function HealthStatusModal({ open, onOpenChange, getApiUrl }: HealthStatu
         authHeaders["Authorization"] = `Bearer ${token}`
       }
 
-      const response = await fetch(getApiUrl(force ? "/api/health/full?refresh=1" : "/api/health/full"), { headers: authHeaders })
+      const path = cachedOnly ? "/api/health/full?cached=1" : force ? "/api/health/full?refresh=1" : "/api/health/full"
+      const response = await fetch(getApiUrl(path), { headers: authHeaders, signal: controller.signal })
+      if (healthRequest.current !== controller) return
       let infoCount = 0
       
       if (!response.ok) {
+        // Polling cannot fall back to a legacy endpoint that runs a full audit.
+        if (cachedOnly) throw new Error(t("healthStatus.errors.fetchFailed"))
         // Fallback to legacy endpoint
-        const legacyResponse = await fetch(getApiUrl("/api/health/details"), { headers: authHeaders })
+        const legacyResponse = await fetch(getApiUrl("/api/health/details"), { headers: authHeaders, signal: controller.signal })
         if (!legacyResponse.ok) throw new Error(t("healthStatus.errors.fetchFailed"))
         const data = await legacyResponse.json()
+        if (healthRequest.current !== controller) return
         setHealthData(data)
         setDismissedItems([])
         setCustomSuppressions([])
@@ -171,6 +183,8 @@ export function HealthStatusModal({ open, onOpenChange, getApiUrl }: HealthStatu
         }
       } else {
         const fullData: FullHealthData = await response.json()
+        if (healthRequest.current !== controller) return
+        if (!fullData?.health?.details) throw new Error(t("healthStatus.errors.fetchFailed"))
         setHealthData(fullData.health)
         setDismissedItems(fullData.dismissed || [])
         setCustomSuppressions(fullData.custom_suppressions || [])
@@ -210,9 +224,15 @@ export function HealthStatusModal({ open, onOpenChange, getApiUrl }: HealthStatu
       })
       window.dispatchEvent(event)
     } catch (err) {
-      setError(err instanceof Error ? err.message : t("healthStatus.errors.unknown"))
+      if (healthRequest.current === controller) {
+        setError(err instanceof Error ? err.message : t("healthStatus.errors.unknown"))
+      }
     } finally {
-      setLoading(false)
+      if (timeout !== undefined) clearTimeout(timeout)
+      if (healthRequest.current === controller) {
+        healthRequest.current = null
+        setLoading(false)
+      }
     }
   }, [getApiUrl, t])
 
@@ -228,9 +248,21 @@ export function HealthStatusModal({ open, onOpenChange, getApiUrl }: HealthStatu
   useEffect(() => {
     if (open) {
       fetchHealthDetails()
-      // Auto-refresh every 5 minutes while modal is open
-      const refreshInterval = setInterval(() => fetchHealthDetails(), 300000)
-      return () => clearInterval(refreshInterval)
+      // Recheck reboot evidence promptly without running APT/full health checks.
+      const refresh = () => {
+        if (document.visibilityState === "visible") void fetchHealthDetails(false, true)
+      }
+      const refreshInterval = setInterval(refresh, 30000)
+      window.addEventListener("focus", refresh)
+      document.addEventListener("visibilitychange", refresh)
+      return () => {
+        clearInterval(refreshInterval)
+        window.removeEventListener("focus", refresh)
+        document.removeEventListener("visibilitychange", refresh)
+        const controller = healthRequest.current
+        healthRequest.current = null
+        controller?.abort()
+      }
     }
   }, [open, fetchHealthDetails])
 
@@ -248,7 +280,11 @@ export function HealthStatusModal({ open, onOpenChange, getApiUrl }: HealthStatu
           nonOkCategories.add(key)
         }
       })
-      setExpandedCategories(nonOkCategories)
+      const newlyDegraded = [...nonOkCategories].filter(key => !previousAutoExpanded.current.has(key))
+      previousAutoExpanded.current = nonOkCategories
+      if (newlyDegraded.length) {
+        setExpandedCategories(previous => new Set([...previous, ...newlyDegraded]))
+      }
     }
   }, [healthData])
 

AppImage/components/proxmox-dashboard.tsx

@@ -1,6 +1,6 @@
 "use client"
 
-import React, { useState, useEffect, useMemo, useCallback } from "react"
+import React, { useState, useEffect, useMemo, useCallback, useRef } from "react"
 import useSWR from "swr"
 import { Badge } from "./ui/badge"
 import { Button } from "./ui/button"
@@ -185,10 +185,18 @@ function MonitorDashboard({ product }: { product: Product }) {
     }
   }, [])
 
+  const healthRequest = useRef<AbortController | null>(null)
   // Fetch health info count independently (for initial load and refresh)
-  const fetchHealthInfoCount = useCallback(async () => {
+  const fetchHealthInfoCount = useCallback(async (cachedOnly = false) => {
+    if (cachedOnly && healthRequest.current) return
+    healthRequest.current?.abort()
+    const controller = new AbortController()
+    healthRequest.current = controller
+    const timeout = cachedOnly ? setTimeout(() => controller.abort(), 10000) : undefined
     try {
-      const response = await fetchApi("/api/health/full")
+      const response = await fetchApi(cachedOnly ? "/api/health/full?cached=1" : "/api/health/full", { signal: controller.signal })
+      if (healthRequest.current !== controller) return
+      if (!response?.health?.details) throw new Error("Invalid health snapshot")
       let calculatedInfoCount = 0
       
       if (response && response.health?.details) {
@@ -218,7 +226,10 @@ function MonitorDashboard({ product }: { product: Product }) {
       
       setInfoCount(calculatedInfoCount)
     } catch (error) {
-      // Silently fail - infoCount will remain at 0
+      // Preserve the last known count; a failed poll is not a healthy result.
+    } finally {
+      if (timeout !== undefined) clearTimeout(timeout)
+      if (healthRequest.current === controller) healthRequest.current = null
     }
   }, [])
 
@@ -269,20 +280,29 @@ function MonitorDashboard({ product }: { product: Product }) {
   fetchHealthInfoCount()
   fetchUpdateStatus()
 
-    // Overview polls health every 30 s; the other tabs every 60 s.
+    // Header reboot information stays current on every tab, without full audits.
+    const refreshHealth = () => {
+      if (document.visibilityState === "visible") void fetchHealthInfoCount(true)
+    }
     let interval: ReturnType<typeof setInterval> | null = null
     let healthInterval: ReturnType<typeof setInterval> | null = null
     if (activeTab === "overview") {
       interval = setInterval(fetchSystemData, 30000) // 30 segundos
-      healthInterval = setInterval(fetchHealthInfoCount, 30000) // Also refresh info count
     } else {
       interval = setInterval(fetchSystemData, 60000) // 60 segundos
-      healthInterval = setInterval(fetchHealthInfoCount, 60000) // Also refresh info count
     }
 
+    healthInterval = setInterval(refreshHealth, 30000)
+    window.addEventListener("focus", refreshHealth)
+    document.addEventListener("visibilitychange", refreshHealth)
     return () => {
       if (interval) clearInterval(interval)
       if (healthInterval) clearInterval(healthInterval)
+      window.removeEventListener("focus", refreshHealth)
+      document.removeEventListener("visibilitychange", refreshHealth)
+      const controller = healthRequest.current
+      healthRequest.current = null
+      controller?.abort()
     }
   }, [fetchSystemData, fetchHealthInfoCount, fetchUpdateStatus, activeTab])
 
@@ -391,6 +411,7 @@ function MonitorDashboard({ product }: { product: Product }) {
   const refreshData = async () => {
     setIsRefreshing(true)
     await fetchSystemData()
+    await fetchHealthInfoCount()
     setComponentKey((prev) => prev + 1)
     await new Promise((resolve) => setTimeout(resolve, 500))
     setIsRefreshing(false)

AppImage/scripts/flask_health_routes.py

@@ -243,10 +243,14 @@ def get_full_health():
     security before returning, so an event that just changed underlying state
     (Update Now finished, dismiss action) sees the new value immediately
     instead of waiting for the next polling tick.
+    ?cached=1 is a strictly read-only poll: no full checks or cache clearing,
+    even with refresh=1. Unavailable/stale snapshots return 503. Every valid
+    response refreshes reboot evidence, while keeping the full audit's date.
     """
     import time as _time
     try:
-        if request.args.get('refresh') == '1':
+        cached_only = request.args.get('cached') == '1'
+        if not cached_only and request.args.get('refresh') == '1':
             for ck in ('updates_check', 'pve_services', 'security_check',
                        '_bg_detailed', '_bg_overall', 'overall_health'):
                 health_monitor.last_check_times.pop(ck, None)
@@ -255,14 +259,24 @@ def get_full_health():
         # Try to use the background-cached detailed result for instant response
         bg_key = '_bg_detailed'
         bg_last = health_monitor.last_check_times.get(bg_key, 0)
-        bg_age = _time.time() - bg_last
+        bg_age = _time.time() - bg_last if type(bg_last) in (int, float) else float('inf')
 
-        if bg_age < 360 and bg_key in health_monitor.cached_results:
+        if 0 <= bg_age < 360 and bg_key in health_monitor.cached_results:
             # Use cached result (at most ~5 min old)
             details = health_monitor.cached_results[bg_key]
+        elif cached_only:
+            # Automatic polling must never start APT or a full audit, even
+            # during startup, collector failure, expiry or a conflicting flag.
+            return jsonify({'error': 'Health snapshot is not available yet'}), 503
         else:
             # No fresh cache, run live (first load or cache expired)
             details = health_monitor.get_detailed_status()
+
+        # Installed/running kernel state changes outside Monitor jobs too.
+        # Overlay fresh read-only evidence without refreshing other checks or
+        # rewriting the background collector's snapshot/timestamp.
+        from kernel_reboot import refresh_health_reboot
+        details = refresh_health_reboot(details)
         
         active_errors = health_persistence.get_active_errors()
         dismissed = health_persistence.get_dismissed_errors()

AppImage/scripts/kernel_reboot.py

@@ -1,5 +1,6 @@
 """Read-only reboot evidence, independent of APT pending-update caches."""
 import os
+import copy
 from pathlib import Path
 import re
 import subprocess
@@ -63,6 +64,13 @@ def with_reboot_status(updates, reboot):
         return updates
     result = dict(updates or dict(status='UNKNOWN', count=None, checks={}))
     result['checks'] = dict(result.get('checks') or {})
+    # Keep the package result separate so a later reboot-only overlay can
+    # clear its own INFO/UNKNOWN without hiding a package-check failure.
+    base_status = result.get('package_status', result.get('status', 'UNKNOWN'))
+    if result.get('all_dismissed'):
+        base_status = 'OK'
+    result['package_status'] = base_status
+    result['status'] = base_status
     required = reboot['state'] == 'required'
     unknown = reboot['state'] == 'unknown'
     result['reboot_required'] = True if required else None if unknown else False
@@ -77,3 +85,32 @@ def with_reboot_status(updates, reboot):
     if result.get('status') == 'OK' and (required or unknown):
         result['status'] = 'INFO' if required else 'UNKNOWN'
     return result
+
+
+def refresh_health_reboot(snapshot):
+    """Refresh only reboot evidence on an immutable, dated health snapshot.
+
+    Never runs the full health check, APT, persistence writes or lifecycle
+    commands. Other categories and the audit timestamp retain their age.
+    """
+    result = copy.deepcopy(snapshot)
+    details = result.get('details')
+    if not isinstance(details, dict) or not isinstance(details.get('updates'), dict):
+        raise ValueError('Health snapshot has no updates result')
+    details['updates'] = with_reboot_status(details['updates'], reboot_status())
+    if details['updates']['status'] == snapshot['details']['updates']['status']:
+        return result
+    issues = {status: [] for status in ('CRITICAL', 'WARNING', 'UNKNOWN', 'INFO')}
+    for key, block in details.items():
+        if not isinstance(block, dict):
+            continue
+        status = block.get('status', 'UNKNOWN')
+        if status in issues:
+            label = key.replace('_', ' ').capitalize()
+            reason = block.get('reason')
+            issues[status].append(f'{label}: {reason}' if reason else label)
+    result['overall'] = ('CRITICAL' if issues['CRITICAL'] else 'WARNING'
+                         if issues['WARNING'] or issues['UNKNOWN'] else 'OK')
+    primary = next((values for values in issues.values() if values), [])
+    result['summary'] = '; '.join(primary) if primary else 'All systems operational'
+    return result

tests/test_reboot_health_refresh.cjs

@@ -0,0 +1,130 @@
+// Execute actual TS callbacks/effects with controlled transport and clocks.
+const assert = require('node:assert/strict')
+const fs = require('node:fs'), path = require('node:path'), vm = require('node:vm')
+const app = path.resolve(__dirname, '../AppImage')
+const ts = require(path.join(app, 'node_modules/typescript'))
+function source(file, name, effectText) {
+  const tree = ts.createSourceFile(file, fs.readFileSync(path.join(app, 'components', file), 'utf8'), ts.ScriptTarget.Latest, true, ts.ScriptKind.TSX)
+  let callback, effect
+  function walk(n) {
+    if (ts.isVariableDeclaration(n) && n.name.getText(tree) === name) callback = n.initializer.arguments[0].getText(tree)
+    if (ts.isCallExpression(n) && n.expression.getText(tree) === 'useEffect' && n.arguments[0].getText(tree).includes(effectText)) effect = n.arguments[0].getText(tree)
+    ts.forEachChild(n, walk)
+  }
+  walk(tree)
+  assert.ok(callback && effect)
+  return {callback, effect}
+}
+const modal = source('health-status-modal.tsx', 'fetchHealthDetails', 'Recheck reboot evidence')
+const header = source('proxmox-dashboard.tsx', 'fetchHealthInfoCount', 'Header reboot information')
+const compile = (code, scope) => vm.runInNewContext(ts.transpileModule('('+code+')', {compilerOptions:{target:ts.ScriptTarget.ES2020}}).outputText, scope)
+function environment() {
+  const calls = [], data = [], errors = [], counts = [], events = [], timers = new Map(), listeners = new Map()
+  let timerId = 0
+  const categories = [{key:'updates', category:'updates'}]
+  const scope = {AbortController, CustomEvent:class {constructor(type, values){this.type=type;this.detail=values.detail}},
+    healthRequest:{current:null}, getAuthToken:()=>null, getApiUrl:p=>p, t:s=>s,
+    CATEGORIES:categories, HEALTH_CATEGORY_KEYS:categories,
+    setHealthData:v=>data.push(v), setDismissedItems(){}, setCustomSuppressions(){},
+    setLoading(){}, setError:v=>errors.push(v), setInfoCount:v=>counts.push(v),
+    setTimeout(fn, delay){timers.set(++timerId,{fn,delay});return timerId}, clearTimeout:id=>timers.delete(id),
+    window:{dispatchEvent:e=>events.push(e)},
+    fetch:async(p, opts)=>{calls.push({p,opts});return {ok:true,json:async()=>payload('INFO')}},
+    fetchApi:async(p, opts)=>{calls.push({p,opts});return payload('INFO')}}
+  return {scope,calls,data,errors,counts,events,timers,listeners}
+}
+function payload(status='OK') {return {health:{overall:'OK',timestamp:'original',details:{updates:{status,count:0}}},dismissed:[],custom_suppressions:[]}}
+async function callbacks() {
+  for (const [item, args] of [[modal,[false,true]],[header,[true]]]) {
+    const env=environment(), run=compile(item.callback,env.scope)
+    await run(...args)
+    assert.equal(env.calls[0].p,'/api/health/full?cached=1')
+    assert.equal(env.scope.healthRequest.current,null)
+    assert.equal(env.timers.size,0)
+    assert.deepEqual(item===modal ? env.events[0].detail.infoCount : env.counts[0],1)
+  }
+  const env=environment(), run=compile(modal.callback,env.scope)
+  env.scope.fetch=async(p)=>{env.calls.push({p});return {ok:false}}
+  await run(false,true)
+  assert.deepEqual(env.calls.map(x=>x.p),['/api/health/full?cached=1'])
+  assert.equal(env.data.length,0)
+  assert.ok(env.errors.includes('healthStatus.errors.fetchFailed'))
+  const malformed=environment()
+  malformed.scope.fetch=async()=>({ok:true,json:async()=>({})})
+  await compile(modal.callback,malformed.scope)(false,true)
+  assert.equal(malformed.data.length,0)
+  assert.ok(malformed.errors.includes('healthStatus.errors.fetchFailed'))
+  const h=environment()
+  h.scope.fetchApi=async()=>({})
+  await compile(header.callback,h.scope)(true)
+  assert.equal(h.counts.length,0,'malformed data must not replace the previous count with zero')
+}
+async function races() {
+  for (const [item, args, forceArgs] of [[modal,[false,true],[true]],[header,[true],[]]]) {
+    const e=environment(), pending=[]
+    if(item===modal) e.scope.fetch=(p,opts)=>{e.calls.push({p,opts});return new Promise(resolve=>pending.push(resolve))}
+    else e.scope.fetchApi=(p,opts)=>{e.calls.push({p,opts});return new Promise(resolve=>pending.push(resolve))}
+    const run=compile(item.callback,e.scope), first=run(...args)
+    await run(...args)
+    assert.equal(e.calls.length,1,'overlapping polls are coalesced')
+    const second=run(...forceArgs)
+    assert.ok(e.calls[0].opts.signal.aborted,'explicit refresh supersedes old poll')
+    pending[1](item===modal ? {ok:true,json:async()=>payload('INFO')} : payload('INFO'))
+    await second
+    pending[0](item===modal ? {ok:true,json:async()=>payload('OK')} : payload('OK'))
+    await first
+    assert.equal(item===modal ? e.data.length : e.counts.length,1,'late response cannot overwrite new data')
+    assert.equal(item===modal ? e.events[0].detail.infoCount : e.counts[0],1)
+    assert.equal(e.timers.size,0)
+  }
+}
+function effects(item, activeTab='overview') {
+  const e=environment(), intervals=new Map(), listeners=new Map(), polls=[]
+  let timerId=0
+  e.scope.open=true; e.scope.activeTab=activeTab
+  e.scope.fetchHealthDetails=(...args)=>polls.push(args)
+  e.scope.fetchHealthInfoCount=(...args)=>polls.push(args)
+  e.scope.fetchSystemData=()=>{}; e.scope.fetchUpdateStatus=()=>{}
+  e.scope.setInterval=(fn,delay)=>{intervals.set(++timerId,{fn,delay});return timerId}
+  e.scope.clearInterval=id=>intervals.delete(id)
+  const target = name=>({addEventListener:(type,fn)=>listeners.set(name+type,fn),removeEventListener:(type,fn)=>{assert.equal(listeners.get(name+type),fn);listeners.delete(name+type)}})
+  Object.assign(e.scope.window,target('window'))
+  e.scope.document={visibilityState:'visible',...target('document')}
+  const cleanup=compile(item.effect,e.scope)()
+  const interval=[...intervals.values()].find(x=>x.delay===30000 && x.fn.toString().includes('fetchHealth'))
+  assert.ok(interval,'every tab polls health at 30 seconds')
+  assert.equal(polls.length,1,'initial full request retained')
+  interval.fn(); listeners.get('windowfocus')(); listeners.get('documentvisibilitychange')()
+  assert.equal(polls.length,4)
+  for(const args of polls.slice(1))assert.deepEqual(args,item===modal?[false,true]:[true])
+  e.scope.document.visibilityState='hidden'
+  interval.fn();listeners.get('documentvisibilitychange')()
+  assert.equal(polls.length,4,'hidden document does not poll')
+  const controller=new AbortController();e.scope.healthRequest.current=controller
+  cleanup()
+  assert.ok(controller.signal.aborted)
+  assert.equal(e.scope.healthRequest.current,null)
+  assert.equal(intervals.size,0)
+  assert.equal(listeners.size,0)
+}
+function expansion() {
+  const text=fs.readFileSync(path.join(app,'components/health-status-modal.tsx'),'utf8')
+  const tree=ts.createSourceFile('modal.tsx',text,ts.ScriptTarget.Latest,true,ts.ScriptKind.TSX)
+  let code
+  function walk(n) {
+    if(ts.isCallExpression(n)&&n.expression.getText(tree)==='useEffect'&&n.arguments[0].getText(tree).includes('newlyDegraded'))code=n.arguments[0].getText(tree)
+    ts.forEachChild(n,walk)
+  }
+  walk(tree);assert.ok(code)
+  let expanded=new Set(['updates'])
+  const scope={Set,CATEGORIES:[{key:'updates'},{key:'cpu'}],previousAutoExpanded:{current:new Set()},
+    healthData:{details:{updates:{status:'INFO'},cpu:{status:'OK'}}},setExpandedCategories:fn=>{expanded=fn(expanded)}}
+  const effect=compile(code,scope)
+  effect();assert.ok(expanded.has('updates'),'poll must preserve manually opened updates')
+  scope.healthData.details.cpu.status='WARNING';effect()
+  assert.ok(expanded.has('cpu'),'new warnings may expand')
+  expanded.delete('cpu');effect()
+  assert.ok(!expanded.has('cpu'),'poll must preserve user collapsing a known warning')
+}
+async function main() {await callbacks();await races();effects(modal);effects(header);effects(header,'settings');expansion();console.log('PASS actual health callbacks: polling, focus, errors, no fallback, races, expansion and cleanup')}
+main().catch(e=>{console.error(e);process.exitCode=1})

tests/test_reboot_health_refresh.py

@@ -0,0 +1,173 @@
+"""Actual full-health route with inert collaborators; no APT or host actions."""
+import ast
+import copy
+from pathlib import Path
+import subprocess
+import sys
+import time
+from types import SimpleNamespace
+import unittest
+from unittest.mock import Mock, patch
+
+from flask import Flask, jsonify, request
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / 'AppImage/scripts'))
+import kernel_reboot as kernel
+
+
+def snapshot():
+    return dict(overall='OK', summary='All systems operational', timestamp='original', details={
+        'cpu': dict(status='OK', checks={}),
+        'updates': dict(status='OK', count=0, checks={'pending_updates': dict(status='OK')})})
+
+
+class FullHealth(unittest.TestCase):
+    def setUp(self):
+        self.app = Flask(__name__)
+        self.now = time.time()
+        self.cached = snapshot()
+        self.owner = SimpleNamespace(cached_results={'_bg_detailed': self.cached},
+                                     last_check_times={'_bg_detailed': self.now},
+                                     get_detailed_status=Mock(return_value=snapshot()))
+        persistence = SimpleNamespace(get_active_errors=Mock(return_value=[]),
+                                      get_dismissed_errors=Mock(return_value=[]),
+                                      get_custom_suppressions=Mock(return_value=[]))
+        node = next(n for n in ast.parse((ROOT/'AppImage/scripts/flask_health_routes.py').read_text()).body
+                    if isinstance(n, ast.FunctionDef) and n.name == 'get_full_health')
+        node.decorator_list = []
+        self.scope = dict(health_monitor=self.owner, health_persistence=persistence,
+                          request=request, jsonify=jsonify)
+        exec(compile(ast.Module(body=[node], type_ignores=[]), 'actual-health-route', 'exec'), self.scope)
+        self.uname = patch.object(kernel.os, 'uname', return_value=SimpleNamespace(release='7.0.14-25-pve'))
+        self.marker = patch.object(Path, 'exists', return_value=False)
+        self.uname.start(); self.marker.start()
+        self.addCleanup(self.uname.stop); self.addCleanup(self.marker.stop)
+        def command(args, **kwargs):
+            self.assertEqual(args, ['dpkg-query', '-W', '-f=${db:Status-Status}\t${binary:Package}\n'])
+            return subprocess.CompletedProcess(args, 0, 'installed\tproxmox-kernel-7.0.14-26-pve-signed\n', '')
+        self.probe = patch.object(kernel.subprocess, 'run', side_effect=command).start()
+        self.addCleanup(patch.stopall)
+
+    def call(self, query=''):
+        with self.app.test_request_context('/api/health/full'+query), patch('time.time', return_value=self.now):
+            response = self.scope['get_full_health']()
+            if isinstance(response, tuple):
+                return response[0].get_json(), response[1]
+            return response.get_json(), response.status_code
+
+    def test_cached_full_response_detects_external_update_without_full_check(self):
+        before = copy.deepcopy(self.cached)
+        result, code = self.call()
+        self.assertEqual(code, 200)
+        self.assertTrue(result['health']['details']['updates']['reboot_required'])
+        self.assertEqual(result['health']['details']['updates']['count'], 0)
+        self.assertEqual(result['health']['timestamp'], 'original')
+        self.assertEqual(self.cached, before)
+        self.owner.get_detailed_status.assert_not_called()
+        self.assertEqual(self.probe.call_count, 1)
+
+    def test_cached_only_miss_expiry_and_future_never_run_full_check_or_clear_cache(self):
+        for age in (360, 360.001, -1):
+            for query in ('?cached=1', '?cached=1&refresh=1'):
+                with self.subTest(age=age, query=query):
+                    self.owner.last_check_times['_bg_detailed'] = self.now-age
+                    before = copy.deepcopy(self.owner.cached_results)
+                    result, code = self.call(query)
+                    self.assertEqual(code, 503)
+                    self.assertIn('error', result)
+                    self.assertEqual(self.owner.cached_results, before)
+        self.owner.cached_results.clear()
+        self.assertEqual(self.call('?cached=1')[1], 503)
+        self.owner.get_detailed_status.assert_not_called()
+        self.probe.assert_not_called()
+
+    def test_cached_only_just_before_boundary_is_fresh_reboot_without_full_check(self):
+        self.owner.last_check_times['_bg_detailed'] = self.now-359.999
+        result, code = self.call('?cached=1')
+        self.assertEqual(code, 200)
+        self.assertTrue(result['health']['details']['updates']['reboot_required'])
+        self.owner.get_detailed_status.assert_not_called()
+
+    def test_invalid_timestamp_and_incomplete_snapshot_never_start_full_check(self):
+        for value in (None, 'bad', float('nan'), float('inf')):
+            self.owner.last_check_times['_bg_detailed'] = value
+            self.assertEqual(self.call('?cached=1')[1], 503)
+        self.owner.last_check_times['_bg_detailed'] = self.now
+        self.owner.cached_results['_bg_detailed'] = {'details': {}}
+        self.assertEqual(self.call('?cached=1')[1], 500)
+        self.owner.get_detailed_status.assert_not_called()
+        self.probe.assert_not_called()
+
+    def test_probe_failure_is_unknown_not_green_and_retains_other_categories(self):
+        self.cached['details']['cpu']['status'] = 'CRITICAL'
+        self.cached['overall'] = 'CRITICAL'
+        with patch.object(kernel.subprocess, 'run', side_effect=OSError('fixture-read-error')):
+            result, code = self.call('?cached=1')
+        self.assertEqual(code, 200)
+        health = result['health']
+        self.assertIsNone(health['details']['updates']['reboot_required'])
+        self.assertEqual(health['details']['updates']['status'], 'UNKNOWN')
+        self.assertEqual(health['overall'], 'CRITICAL')
+        self.assertEqual(health['details']['cpu'], self.cached['details']['cpu'])
+
+    def test_marker_zero_package_probes_and_no_process_or_shell_actions(self):
+        with patch.object(Path, 'exists', return_value=True), \
+             patch.object(kernel.subprocess, 'Popen') as spawn, patch.object(kernel.os, 'system') as shell:
+            self.assertTrue(self.call('?cached=1')[0]['health']['details']['updates']['reboot_required'])
+            spawn.assert_not_called()
+            shell.assert_not_called()
+        self.probe.assert_not_called()
+
+    def test_explicit_refresh_retains_original_full_check_contract(self):
+        result, code = self.call('?refresh=1')
+        self.assertEqual(code, 200)
+        self.owner.get_detailed_status.assert_called_once()
+
+
+class Overlay(unittest.TestCase):
+    def test_repeated_required_unknown_current_preserves_package_result_and_snapshot(self):
+        states = [dict(state=s, running_kernel='old', installed_kernel='new' if s=='required' else None)
+                  for s in ('required', 'unknown', 'current')]
+        for package in ('OK', 'INFO', 'WARNING', 'CRITICAL', 'UNKNOWN'):
+            value = snapshot()
+            value['details']['updates']['status'] = package
+            before = copy.deepcopy(value)
+            for state in states:
+                previous = copy.deepcopy(value)
+                with patch.object(kernel, 'reboot_status', return_value=state):
+                    refreshed = kernel.refresh_health_reboot(value)
+                self.assertEqual(value, previous)
+                value = refreshed
+                block = value['details']['updates']
+                expected = ('INFO' if state['state']=='required' else 'UNKNOWN' if state['state']=='unknown' else 'OK') if package=='OK' else package
+                self.assertEqual(block['status'], expected)
+                self.assertEqual(block['package_status'], package)
+                self.assertEqual(value['timestamp'], 'original')
+                self.assertEqual(value['details']['cpu'], before['details']['cpu'])
+
+    def test_dismissed_package_warning_stays_dismissed_but_reboot_remains_visible(self):
+        value = snapshot()
+        value['details']['updates'].update(status='OK', package_status='WARNING', all_dismissed=True)
+        state = dict(state='required', running_kernel='old', installed_kernel='new')
+        with patch.object(kernel, 'reboot_status', return_value=state):
+            result = kernel.refresh_health_reboot(value)
+        self.assertEqual(result['details']['updates']['status'], 'INFO')
+        self.assertTrue(result['details']['updates']['all_dismissed'])
+        self.assertEqual(value['details']['updates']['status'], 'OK')
+
+    def test_unknown_recovery_recomputes_overall_without_erasing_unrelated_warning(self):
+        value = snapshot()
+        with patch.object(kernel, 'reboot_status', return_value=dict(state='unknown', running_kernel='old')):
+            value = kernel.refresh_health_reboot(value)
+        self.assertEqual(value['overall'], 'WARNING')
+        with patch.object(kernel, 'reboot_status', return_value=dict(state='current', running_kernel='new')):
+            recovered = kernel.refresh_health_reboot(value)
+            value['details']['cpu']['status'] = 'WARNING'
+            preserved = kernel.refresh_health_reboot(value)
+        self.assertEqual(recovered['overall'], 'OK')
+        self.assertEqual(preserved['overall'], 'WARNING')
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)