diff --git a/server/api/admin/logs/sessions/[sessionId].get.ts b/server/api/admin/logs/sessions/[sessionId].get.ts
index 4cd3f73..5d433fa 100644
--- a/server/api/admin/logs/sessions/[sessionId].get.ts
+++ b/server/api/admin/logs/sessions/[sessionId].get.ts
@@ -70,8 +70,8 @@ export default defineEventHandler(async (event) => {
     }
   }
 
-  const startedAt = toISO(items[0].createdAt)
-  const updatedAt = toISO(items[items.length - 1].createdAt)
+  const startedAt = toISO(items[0]?.createdAt)
+  const updatedAt = toISO(items[items.length - 1]?.createdAt)
   const callsign = extractCallsign(items)
 
   return {
diff --git a/server/api/admin/users/[id]/notes.patch.ts b/server/api/admin/users/[id]/notes.patch.ts
index 27279f4..3f82b3d 100644
--- a/server/api/admin/users/[id]/notes.patch.ts
+++ b/server/api/admin/users/[id]/notes.patch.ts
@@ -16,7 +16,7 @@ export default defineEventHandler(async (event) => {
     throw createError({ statusCode: 400, statusMessage: 'Missing user ID' })
   }
 
-  const body = await readBody<UpdateNotesBody>(event).catch(() => ({}))
+  const body = await readBody<UpdateNotesBody>(event).catch(() => ({}) as UpdateNotesBody)
   const rawNotes = typeof body.notes === 'string' ? body.notes.replace(/\r\n/g, '\n') : ''
   const notes = rawNotes.trim()
 
diff --git a/server/api/admin/users/[id]/role.patch.ts b/server/api/admin/users/[id]/role.patch.ts
index c0752da..54f69d2 100644
--- a/server/api/admin/users/[id]/role.patch.ts
+++ b/server/api/admin/users/[id]/role.patch.ts
@@ -15,7 +15,7 @@ export default defineEventHandler(async (event) => {
     throw createError({ statusCode: 400, statusMessage: 'Missing user ID' })
   }
 
-  const body = await readBody<UpdateRoleBody>(event).catch(() => ({}))
+  const body = await readBody<UpdateRoleBody>(event).catch(() => ({}) as UpdateRoleBody)
   const role = body.role?.trim()
 
   if (!role || !['user', 'admin', 'dev'].includes(role)) {
diff --git a/server/api/admin/waitlist/[id]/invite.post.ts b/server/api/admin/waitlist/[id]/invite.post.ts
index 3c6d371..201169d 100644
--- a/server/api/admin/waitlist/[id]/invite.post.ts
+++ b/server/api/admin/waitlist/[id]/invite.post.ts
@@ -1,3 +1,4 @@
+import mongoose from 'mongoose'
 import { createError, defineEventHandler, readBody } from 'h3'
 import { requireAdmin } from '../../../../utils/auth'
 import { WaitlistEntry } from '../../../../models/WaitlistEntry'
@@ -48,7 +49,7 @@ export default defineEventHandler(async (event) => {
       createdBy: admin._id,
     })
 
-    entry.invitationCode = invitation._id
+    entry.invitationCode = invitation._id as mongoose.Types.ObjectId
   }
 
   entry.invitationSentAt = now
diff --git a/server/api/atc/say.post.ts b/server/api/atc/say.post.ts
index 50b2c77..b916ea2 100644
--- a/server/api/atc/say.post.ts
+++ b/server/api/atc/say.post.ts
@@ -193,7 +193,6 @@ export default defineEventHandler(async (event) => {
             const tts = await normalize.audio.speech.create({
                 model: TTS_MODEL,
                 voice,
-                format: "wav",
                 input: normalized,
                 speed
             });
diff --git a/server/api/editor/flows/[slug]/index.put.ts b/server/api/editor/flows/[slug]/index.put.ts
index d202e62..4e7a9a9 100644
--- a/server/api/editor/flows/[slug]/index.put.ts
+++ b/server/api/editor/flows/[slug]/index.put.ts
@@ -99,10 +99,14 @@ export default defineEventHandler(async (event) => {
       const panY = body.layout.pan.y
       const parsedX = typeof panX === 'number' ? panX : Number(panX)
       const parsedY = typeof panY === 'number' ? panY : Number(panY)
-      if (Number.isFinite(parsedX)) layout.pan = layout.pan || { x: 0, y: 0 }
-      if (Number.isFinite(parsedX)) layout.pan.x = parsedX
-      if (Number.isFinite(parsedY)) layout.pan = layout.pan || { x: 0, y: 0 }
-      if (Number.isFinite(parsedY)) layout.pan.y = parsedY
+      if (Number.isFinite(parsedX)) {
+        layout.pan = layout.pan || { x: 0, y: 0 }
+        layout.pan.x = parsedX
+      }
+      if (Number.isFinite(parsedY)) {
+        layout.pan = layout.pan || { x: 0, y: 0 }
+        layout.pan.y = parsedY
+      }
     }
     if (Array.isArray(body.layout.groups)) {
       layout.groups = body.layout.groups
@@ -125,7 +129,7 @@ export default defineEventHandler(async (event) => {
             bounds,
           }
         })
-        .filter((group): group is NonNullable<typeof group> => Boolean(group))
+        .filter((group: any): group is NonNullable<typeof group> => Boolean(group))
     }
     flow.layout = layout
     flow.markModified('layout')
diff --git a/server/api/editor/flows/[slug]/nodes/[stateId]/index.put.ts b/server/api/editor/flows/[slug]/nodes/[stateId]/index.put.ts
index 1f50b49..ee976c7 100644
--- a/server/api/editor/flows/[slug]/nodes/[stateId]/index.put.ts
+++ b/server/api/editor/flows/[slug]/nodes/[stateId]/index.put.ts
@@ -13,6 +13,7 @@ import {
 import { serializeNodeDocument } from '../../../../../../services/decisionFlowService'
 import type {
   DecisionNodeCondition,
+  DecisionNodeRole,
   DecisionNodeTrigger,
   DecisionNodeTransition,
 } from '~~/shared/types/decision'
@@ -58,7 +59,7 @@ export default defineEventHandler(async (event) => {
     if (!ROLE_SET.has(role)) {
       throw createError({ statusCode: 400, statusMessage: 'role must be pilot, atc or system' })
     }
-    node.role = role
+    node.role = role as DecisionNodeRole
   }
 
   if (typeof body.phase === 'string' && body.phase.trim()) {
@@ -84,7 +85,7 @@ export default defineEventHandler(async (event) => {
   }
 
   if (typeof body.autoBehavior === 'string') {
-    node.autoBehavior = body.autoBehavior.trim() || undefined
+    node.autoBehavior = (body.autoBehavior.trim() || undefined) as typeof node.autoBehavior
   }
 
   if (Array.isArray(body.actions)) {
diff --git a/server/api/service/auth/register.post.ts b/server/api/service/auth/register.post.ts
index fea709b..9b93a90 100644
--- a/server/api/service/auth/register.post.ts
+++ b/server/api/service/auth/register.post.ts
@@ -1,3 +1,4 @@
+import mongoose from 'mongoose'
 import { createError, readBody } from 'h3'
 import { hashPassword, issueAuthTokens } from '../../../utils/auth'
 import { User } from '../../../models/User'
@@ -70,7 +71,7 @@ export default defineEventHandler(async (event) => {
     ...(waitlistNotes ? { adminNotes: waitlistNotes } : {}),
   })
 
-  invitation.usedBy = user._id
+  invitation.usedBy = user._id as mongoose.Types.ObjectId
   invitation.usedAt = now
   await invitation.save()
 
diff --git a/server/api/service/cron/waitlist-drip.get.ts b/server/api/service/cron/waitlist-drip.get.ts
index c959f4d..8059b80 100644
--- a/server/api/service/cron/waitlist-drip.get.ts
+++ b/server/api/service/cron/waitlist-drip.get.ts
@@ -1,3 +1,4 @@
+import mongoose from 'mongoose'
 import { defineEventHandler } from 'h3'
 import { InvitationCode } from '../../../models/InvitationCode'
 import { WaitlistEntry } from '../../../models/WaitlistEntry'
@@ -51,7 +52,7 @@ export default defineEventHandler(async () => {
         channel: 'admin',
         label: `Waitlist: ${email}`,
       })
-      entry.invitationCode = invitation._id
+      entry.invitationCode = invitation._id as mongoose.Types.ObjectId
     }
 
     entry.invitationSentAt = sentAt
diff --git a/server/api/service/invitations/manual.post.ts b/server/api/service/invitations/manual.post.ts
index 7620f79..92b7dc6 100644
--- a/server/api/service/invitations/manual.post.ts
+++ b/server/api/service/invitations/manual.post.ts
@@ -23,7 +23,7 @@ function safeComparePassword(provided: string, expected: string) {
   return timingSafeEqual(providedDigest, expectedDigest)
 }
 
-export default defineEventHandler<ManualInviteResponse>(async (event) => {
+export default defineEventHandler(async (event): Promise<ManualInviteResponse> => {
   const config = useRuntimeConfig()
   const expectedPassword = (config.manualInvitePassword as string | undefined)?.trim() || ''
 
diff --git a/server/api/service/roadmap-suggestions.post.ts b/server/api/service/roadmap-suggestions.post.ts
index 364cb12..b707a15 100644
--- a/server/api/service/roadmap-suggestions.post.ts
+++ b/server/api/service/roadmap-suggestions.post.ts
@@ -45,10 +45,10 @@ export default defineEventHandler(async (event) => {
   })
 
   const dataEntries = [
-    ['Title', title],
-    ['Description', details],
-    ['Email', email || null],
-    ['Contact allowed', allowContact],
+    ['Title', title] as const,
+    ['Description', details] as const,
+    ['Email', email || null] as const,
+    ['Contact allowed', allowContact] as const,
   ]
 
   await sendAdminNotification({
@@ -59,6 +59,6 @@ export default defineEventHandler(async (event) => {
 
   return {
     success: true,
-    suggestionId: suggestion._id.toString(),
+    suggestionId: String(suggestion._id),
   }
 })
diff --git a/server/api/service/tools/airportGeocode.ts b/server/api/service/tools/airportGeocode.ts
index f2bd69a..e8bdc54 100644
--- a/server/api/service/tools/airportGeocode.ts
+++ b/server/api/service/tools/airportGeocode.ts
@@ -214,8 +214,9 @@ function createFeature(element: OsmElement): AirportFeature | null {
 
   if (lat === undefined || lon === undefined) return null
 
-  const { aliases, primaryAlias } = buildAliases(tags, featureType)
-  if (aliases.length === 0 || !primaryAlias) return null
+  const aliasResult = buildAliases(tags, featureType)
+  if (aliasResult.aliases.length === 0 || !aliasResult.primaryAlias) return null
+  const { aliases, primaryAlias } = aliasResult as { aliases: string[]; primaryAlias: string }
 
   const normalizedAliases = new Map<string, string>()
   for (const alias of aliases) {
diff --git a/server/api/service/tools/latency.get.ts b/server/api/service/tools/latency.get.ts
index 0e7dbaa..f779f47 100644
--- a/server/api/service/tools/latency.get.ts
+++ b/server/api/service/tools/latency.get.ts
@@ -20,9 +20,7 @@ export default defineEventHandler(async () => {
     try {
         const response = await client.chat.completions.create({
             model,
-            reasoning_effort: 'low',
             n: 1,
-            verbosity: 'low',
             messages: [
                 { role: 'system', content: SYSTEM_PROMPT },
                 { role: 'user', content: `${READBACK}` }
diff --git a/shared/data/flightlab/takeoff-eddf.ts b/shared/data/flightlab/takeoff-eddf.ts
index 7f2bcf6..632c500 100644
--- a/shared/data/flightlab/takeoff-eddf.ts
+++ b/shared/data/flightlab/takeoff-eddf.ts
@@ -154,8 +154,8 @@ export const takeoffEddf: FlightLabScenario = {
       ],
       simConditions: {
         conditions: [
-          { variable: 'TURB_ENG_N1_1', operator: '>=', value: 85 },
-          { variable: 'TURB_ENG_N1_2', operator: '>=', value: 85 },
+          { variable: 'TURB_ENG_N1_1', operator: '>=', value: 80 },
+          { variable: 'TURB_ENG_N1_2', operator: '>=', value: 80 },
           { variable: 'BRAKE_PARKING_POSITION', operator: '==', value: false },
         ],
         logic: 'AND',
diff --git a/shared/data/learnModules.ts b/shared/data/learnModules.ts
index 3f93e49..2f34ca8 100644
--- a/shared/data/learnModules.ts
+++ b/shared/data/learnModules.ts
@@ -1,5 +1,5 @@
 import { createBaseScenario, createScenarioSeries, digitsToWords, formatTemp, lettersToNato } from '~~/shared/learn/scenario'
-import type { ModuleDef, Scenario } from '~~/shared/learn/types'
+import type { Lesson, ModuleDef, Scenario } from '~~/shared/learn/types'
 
 function gradientArt(colors: string[]): string {
   const stops = colors
@@ -14,7 +14,7 @@ function randInt(min: number, max: number): number {
 }
 
 function sample<T>(values: readonly T[]): T {
-  return values[randInt(0, values.length - 1)]
+  return values[randInt(0, values.length - 1)]!
 }
 
 const identifierCharacters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
@@ -75,7 +75,7 @@ function createComplexTaxiScenario(): Scenario {
   return scenario
 }
 
-const fundamentalsLessons = [
+const fundamentalsLessons: Lesson[] = [
   {
     id: 'icao-alphabet',
     title: 'Decode ICAO Letters & Numbers',
@@ -564,7 +564,7 @@ const fundamentalsLessons = [
   }
 ]
 
-const readbackLessons = [
+const readbackLessons: Lesson[] = [
   {
     id: 'clearance-readback',
     title: 'Clearance Readback',
@@ -1810,7 +1810,7 @@ const readbackLessons = [
   }
 ]
 
-const decisionTreeLessons = [
+const decisionTreeLessons: Lesson[] = [
   {
     id: 'clearance-contact',
     title: 'Delivery: Initial contact',
@@ -2534,7 +2534,7 @@ const makeFullFlightGenerator = (reset = false) => () => {
   return fullFlightScenario()
 }
 
-const fullFlightLessons = [
+const fullFlightLessons: Lesson[] = [
   {
     id: 'full-clearance-contact',
     title: 'Delivery Contact',
diff --git a/types/aos.d.ts b/types/aos.d.ts
new file mode 100644
index 0000000..897f7bf
--- /dev/null
+++ b/types/aos.d.ts
@@ -0,0 +1,21 @@
+declare module 'aos' {
+  interface AOSOptions {
+    offset?: number
+    delay?: number | string
+    duration?: number | string
+    easing?: string
+    once?: boolean
+    mirror?: boolean
+    anchorPlacement?: string
+    disable?: boolean | string | (() => boolean)
+  }
+
+  interface AOS {
+    init(options?: AOSOptions): void
+    refresh(force?: boolean): void
+    refreshHard(): void
+  }
+
+  const aos: AOS
+  export default aos
+}