diff --git a/.changeset/fix-bundle-bloat.md b/.changeset/fix-bundle-bloat.md
new file mode 100644
index 0000000..3748042
--- /dev/null
+++ b/.changeset/fix-bundle-bloat.md
@@ -0,0 +1,5 @@
+---
+"mpesa2csv": patch
+---
+
+Reduce initial JS bundle from 1 466 kB to 487 kB (−67%) by removing 10 unused packages, lazy-loading ExcelJS via dynamic import
diff --git a/package.json b/package.json
index 0f3719e..a9d8673 100644
--- a/package.json
+++ b/package.json
@@ -20,13 +20,6 @@
   },
   "dependencies": {
     "@base-ui/react": "^1.2.0",
-    "@krakz999/tabula-node": "^1.0.6",
-    "@radix-ui/react-checkbox": "^1.3.3",
-    "@radix-ui/react-label": "^2.1.7",
-    "@radix-ui/react-scroll-area": "^1.2.10",
-    "@radix-ui/react-select": "^2.2.6",
-    "@radix-ui/react-slot": "^1.2.3",
-    "@radix-ui/react-tooltip": "^1.2.8",
     "@tailwindcss/vite": "^4.1.18",
     "@tauri-apps/api": "^2",
     "@tauri-apps/plugin-dialog": "^2.2.1",
@@ -43,11 +36,8 @@
     "lucide-react": "^0.487.0",
     "papaparse": "^5.5.2",
     "react": "^19.1.0",
-    "react-day-picker": "^9.14.0",
     "react-dom": "^19.1.0",
-    "tailwind-merge": "^3.3.1",
-    "tauri-plugin-pldownloader-api": "^1.0.1",
-    "zustand": "^5.0.8"
+    "tailwind-merge": "^3.3.1"
   },
   "devDependencies": {
     "@changesets/changelog-github": "^0.5.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e2ff4c8..2095b54 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -27,27 +27,6 @@ importers:
       '@base-ui/react':
         specifier: ^1.2.0
         version: 1.2.0(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@krakz999/tabula-node':
-        specifier: ^1.0.6
-        version: 1.0.6
-      '@radix-ui/react-checkbox':
-        specifier: ^1.3.3
-        version: 1.3.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-label':
-        specifier: ^2.1.7
-        version: 2.1.7(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-scroll-area':
-        specifier: ^1.2.10
-        version: 1.2.10(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-select':
-        specifier: ^2.2.6
-        version: 2.2.6(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-slot':
-        specifier: ^1.2.3
-        version: 1.2.3(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-tooltip':
-        specifier: ^1.2.8
-        version: 1.2.8(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
       '@tailwindcss/vite':
         specifier: ^4.1.18
         version: 4.1.18(vite@7.3.6(@types/node@24.5.2)(jiti@2.6.1)(lightningcss@1.30.2))
@@ -96,21 +75,12 @@ importers:
       react:
         specifier: ^19.1.0
         version: 19.1.1
-      react-day-picker:
-        specifier: ^9.14.0
-        version: 9.14.0(react@19.1.1)
       react-dom:
         specifier: ^19.1.0
         version: 19.1.1(react@19.1.1)
       tailwind-merge:
         specifier: ^3.3.1
         version: 3.3.1
-      tauri-plugin-pldownloader-api:
-        specifier: ^1.0.1
-        version: 1.0.1
-      zustand:
-        specifier: ^5.0.8
-        version: 5.0.8(@types/react@19.1.13)(react@19.1.1)(use-sync-external-store@1.6.0(react@19.1.1))
     devDependencies:
       '@changesets/changelog-github':
         specifier: ^0.5.1
@@ -338,9 +308,6 @@ packages:
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     resolution: {integrity: sha512-CdTLvIOPiCNuH71pyDu3rA+Q0n65cmAbXnwWH84rKGiFumFzkmHNT8KHTMEchcxN+Kl8I54xGUhJ7l3E7X396Q==}
 
-  '@date-fns/tz@1.4.1':
-    resolution: {integrity: sha512-P5LUNhtbj6YfI3iJjw5EL9eUAG6OitD0W3fWQcpQjDRc/QIsL0tRNuO1PcDvPccWL1fSTXXdE1ds+l95DV/OFA==}
-
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     resolution: {integrity: sha512-Svl7tq8k/08+p6CXPpRjQ1fKX+1odH/BQbb48fV6fj3CWHhsoIOoY87w1oHXm0qEpkIK3ZfVgp0hed3XBXzXMQ==}
     engines: {node: '>=18'}
@@ -543,10 +510,6 @@ packages:
   '@jridgewell/trace-mapping@0.3.31':
     resolution: {integrity: sha512-zzNR+SdQSDJzc8joaeP8QQoCQr8NuYx2dIIytl1QeBEZHJ9uW6hebsrYgbz8hJwUQao3TWCMtmfV8Nu1twOLAw==}
 
-  '@krakz999/tabula-node@1.0.6':
-    resolution: {integrity: sha512-9X2CcU/648FPAo+0L0EGsD1T2lmBDLtd4g7kZUBpgV+cv3nvp9vNGl2kmG+Ldgz/T0dwXmpu+YTpMk3Ssg50Nw==}
-    engines: {node: '>=12'}
-
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     resolution: {integrity: sha512-mki5uBvhHzO8kYYix/WRy2WX8S3B5wdVSc9D6KcU5lQNglP2yt58/VfLuAK49glRXChosY8ap2oJ1qgma3GUVA==}
 
@@ -565,323 +528,6 @@ packages:
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     engines: {node: '>= 8'}
 
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-
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-    resolution: {integrity: sha512-JTF99U/6XIjCBo0wqkU5sK10glYe27MRRsfwoiq5zzOEZLHU3A3KCMa5X/azekYRCJ0HlwI0crAXS/5dEHTzDg==}
-
-  '@radix-ui/react-arrow@1.1.7':
-    resolution: {integrity: sha512-F+M1tLhO+mlQaOWspE8Wstg+z6PwxwRd8oQ8IXceWz92kfAmalTRf0EjrouQeo7QssEPfCn05B4Ihs1K9WQ/7w==}
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-    peerDependenciesMeta:
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-        optional: true
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-        optional: true
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@@ -1010,10 +656,6 @@ packages:
     cpu: [x64]
     os: [win32]
 
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     engines: {node: '>=8'}
@@ -1382,12 +1020,6 @@ packages:
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-
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@@ -1882,12 +1507,6 @@ packages:
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-    engines: {node: '>=10'}
-    peerDependencies:
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-      react: ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0
-    peerDependenciesMeta:
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-        optional: true
-
-  react-remove-scroll@2.7.1:
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-    engines: {node: '>=10'}
-    peerDependencies:
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-      react: ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc
-    peerDependenciesMeta:
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-
-  react-style-singleton@2.2.3:
-    resolution: {integrity: sha512-b6jSvxvVnyptAiLjbkWLE/lOnR4lfTtDAl+eUC7RZy+QQWc6wRzIV2CE6xBuMmDxc2qIihtDCZD5NPOFl7fRBQ==}
-    engines: {node: '>=10'}
-    peerDependencies:
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-      react: ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc
-    peerDependenciesMeta:
-      '@types/react':
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-
   react@19.1.1:
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     engines: {node: '>=0.10.0'}
@@ -2057,9 +1646,6 @@ packages:
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     engines: {node: '>=6'}
 
-  tauri-plugin-pldownloader-api@1.0.1:
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-
   term-size@2.2.1:
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     engines: {node: '>=8'}
@@ -2082,9 +1668,6 @@ packages:
   traverse@0.3.9:
     resolution: {integrity: sha512-iawgk0hLP3SxGKDfnDJf8wTz4p2qImnyihM5Hh/sGvQ3K37dPi/w8sRhdNIxYA1TwFwc5mDhIJq+O0RsvXBKdQ==}
 
-  tslib@2.8.1:
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-
   tw-animate-css@1.3.8:
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@@ -2109,26 +1692,6 @@ packages:
     peerDependencies:
       browserslist: '>= 4.21.0'
 
-  use-callback-ref@1.3.3:
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-    engines: {node: '>=10'}
-    peerDependencies:
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-      react: ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc
-    peerDependenciesMeta:
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-        optional: true
-
-  use-sidecar@1.1.3:
-    resolution: {integrity: sha512-Fedw0aZvkhynoPYlA5WXrMCAMm+nSWdZt6lzJQ7Ok8S6Q+VsHmHpRWndVRJ8Be0ZbkfPc5LRYH+5XrzXcEeLRQ==}
-    engines: {node: '>=10'}
-    peerDependencies:
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-      react: ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc
-    peerDependenciesMeta:
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-
   use-sync-external-store@1.6.0:
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     peerDependencies:
@@ -2205,24 +1768,6 @@ packages:
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     engines: {node: '>= 10'}
 
-  zustand@5.0.8:
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-    engines: {node: '>=12.20.0'}
-    peerDependencies:
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-      immer: '>=9.0.6'
-      react: '>=18.0.0'
-      use-sync-external-store: '>=1.2.0'
-    peerDependenciesMeta:
-      '@types/react':
-        optional: true
-      immer:
-        optional: true
-      react:
-        optional: true
-      use-sync-external-store:
-        optional: true
-
 snapshots:
 
   '@babel/code-frame@7.29.7':
@@ -2537,8 +2082,6 @@ snapshots:
       human-id: 4.1.1
       prettier: 2.8.8
 
-  '@date-fns/tz@1.4.1': {}
-
   '@esbuild/aix-ppc64@0.28.1':
     optional: true
 
@@ -2679,8 +2222,6 @@ snapshots:
       '@jridgewell/resolve-uri': 3.1.2
       '@jridgewell/sourcemap-codec': 1.5.5
 
-  '@krakz999/tabula-node@1.0.6': {}
-
   '@manypkg/find-root@1.1.0':
     dependencies:
       '@babel/runtime': 7.28.4
@@ -2709,296 +2250,6 @@ snapshots:
       '@nodelib/fs.scandir': 2.1.5
       fastq: 1.19.1
 
-  '@radix-ui/number@1.1.1': {}
-
-  '@radix-ui/primitive@1.1.3': {}
-
-  '@radix-ui/react-arrow@1.1.7(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
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-      react: 19.1.1
-      react-dom: 19.1.1(react@19.1.1)
-    optionalDependencies:
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-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-checkbox@1.3.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
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-      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-context': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-presence': 1.1.5(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-use-controllable-state': 1.2.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-previous': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-size': 1.1.1(@types/react@19.1.13)(react@19.1.1)
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-
-  '@radix-ui/react-collection@1.1.7(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
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-      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-slot': 1.2.3(@types/react@19.1.13)(react@19.1.1)
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-      react-dom: 19.1.1(react@19.1.1)
-    optionalDependencies:
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-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-compose-refs@1.1.2(@types/react@19.1.13)(react@19.1.1)':
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-    optionalDependencies:
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-
-  '@radix-ui/react-context@1.1.2(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
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-    optionalDependencies:
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-
-  '@radix-ui/react-direction@1.1.1(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
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-    optionalDependencies:
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-
-  '@radix-ui/react-dismissable-layer@1.1.11(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
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-      '@radix-ui/react-use-callback-ref': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-escape-keydown': 1.1.1(@types/react@19.1.13)(react@19.1.1)
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-
-  '@radix-ui/react-focus-guards@1.1.3(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
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-
-  '@radix-ui/react-focus-scope@1.1.7(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
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-      '@radix-ui/react-use-callback-ref': 1.1.1(@types/react@19.1.13)(react@19.1.1)
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-
-  '@radix-ui/react-id@1.1.1(@types/react@19.1.13)(react@19.1.1)':
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-
-  '@radix-ui/react-label@2.1.7(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
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-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-popper@1.2.8(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
-      '@floating-ui/react-dom': 2.1.6(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-arrow': 1.1.7(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-context': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-use-callback-ref': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-layout-effect': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-rect': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-size': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/rect': 1.1.1
-      react: 19.1.1
-      react-dom: 19.1.1(react@19.1.1)
-    optionalDependencies:
-      '@types/react': 19.1.13
-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-portal@1.1.9(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
-      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-use-layout-effect': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      react: 19.1.1
-      react-dom: 19.1.1(react@19.1.1)
-    optionalDependencies:
-      '@types/react': 19.1.13
-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-presence@1.1.5(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
-      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-layout-effect': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      react: 19.1.1
-      react-dom: 19.1.1(react@19.1.1)
-    optionalDependencies:
-      '@types/react': 19.1.13
-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-primitive@2.1.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
-      '@radix-ui/react-slot': 1.2.3(@types/react@19.1.13)(react@19.1.1)
-      react: 19.1.1
-      react-dom: 19.1.1(react@19.1.1)
-    optionalDependencies:
-      '@types/react': 19.1.13
-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-scroll-area@1.2.10(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
-      '@radix-ui/number': 1.1.1
-      '@radix-ui/primitive': 1.1.3
-      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-context': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-direction': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-presence': 1.1.5(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-use-callback-ref': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-layout-effect': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      react: 19.1.1
-      react-dom: 19.1.1(react@19.1.1)
-    optionalDependencies:
-      '@types/react': 19.1.13
-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-select@2.2.6(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
-      '@radix-ui/number': 1.1.1
-      '@radix-ui/primitive': 1.1.3
-      '@radix-ui/react-collection': 1.1.7(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-context': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-direction': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-dismissable-layer': 1.1.11(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-focus-guards': 1.1.3(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-focus-scope': 1.1.7(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-id': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-popper': 1.2.8(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-portal': 1.1.9(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-slot': 1.2.3(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-callback-ref': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-controllable-state': 1.2.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-layout-effect': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-previous': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-visually-hidden': 1.2.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      aria-hidden: 1.2.6
-      react: 19.1.1
-      react-dom: 19.1.1(react@19.1.1)
-      react-remove-scroll: 2.7.1(@types/react@19.1.13)(react@19.1.1)
-    optionalDependencies:
-      '@types/react': 19.1.13
-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-slot@1.2.3(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
-      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      react: 19.1.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  '@radix-ui/react-tooltip@1.2.8(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
-      '@radix-ui/primitive': 1.1.3
-      '@radix-ui/react-compose-refs': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-context': 1.1.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-dismissable-layer': 1.1.11(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-id': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-popper': 1.2.8(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-portal': 1.1.9(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-presence': 1.1.5(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      '@radix-ui/react-slot': 1.2.3(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-controllable-state': 1.2.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-visually-hidden': 1.2.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      react: 19.1.1
-      react-dom: 19.1.1(react@19.1.1)
-    optionalDependencies:
-      '@types/react': 19.1.13
-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/react-use-callback-ref@1.1.1(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
-      react: 19.1.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  '@radix-ui/react-use-controllable-state@1.2.2(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
-      '@radix-ui/react-use-effect-event': 0.0.2(@types/react@19.1.13)(react@19.1.1)
-      '@radix-ui/react-use-layout-effect': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      react: 19.1.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  '@radix-ui/react-use-effect-event@0.0.2(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
-      '@radix-ui/react-use-layout-effect': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      react: 19.1.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  '@radix-ui/react-use-escape-keydown@1.1.1(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
-      '@radix-ui/react-use-callback-ref': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      react: 19.1.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  '@radix-ui/react-use-layout-effect@1.1.1(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
-      react: 19.1.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  '@radix-ui/react-use-previous@1.1.1(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
-      react: 19.1.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  '@radix-ui/react-use-rect@1.1.1(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
-      '@radix-ui/rect': 1.1.1
-      react: 19.1.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  '@radix-ui/react-use-size@1.1.1(@types/react@19.1.13)(react@19.1.1)':
-    dependencies:
-      '@radix-ui/react-use-layout-effect': 1.1.1(@types/react@19.1.13)(react@19.1.1)
-      react: 19.1.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  '@radix-ui/react-visually-hidden@1.2.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)':
-    dependencies:
-      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@19.1.9(@types/react@19.1.13))(@types/react@19.1.13)(react-dom@19.1.1(react@19.1.1))(react@19.1.1)
-      react: 19.1.1
-      react-dom: 19.1.1(react@19.1.1)
-    optionalDependencies:
-      '@types/react': 19.1.13
-      '@types/react-dom': 19.1.9(@types/react@19.1.13)
-
-  '@radix-ui/rect@1.1.1': {}
-
   '@rolldown/pluginutils@1.0.0-beta.27': {}
 
   '@rollup/rollup-android-arm-eabi@4.62.2':
@@ -3076,8 +2327,6 @@ snapshots:
   '@rollup/rollup-win32-x64-msvc@4.62.2':
     optional: true
 
-  '@tabby_ai/hijri-converter@1.0.5': {}
-
   '@tailwindcss/node@4.1.18':
     dependencies:
       '@jridgewell/remapping': 2.3.5
@@ -3320,10 +2569,6 @@ snapshots:
 
   argparse@2.0.1: {}
 
-  aria-hidden@1.2.6:
-    dependencies:
-      tslib: 2.8.1
-
   array-union@2.1.0: {}
 
   async@3.2.6: {}
@@ -3431,10 +2676,6 @@ snapshots:
 
   dataloader@1.4.0: {}
 
-  date-fns-jalali@4.1.0-0: {}
-
-  date-fns@4.1.0: {}
-
   dayjs@1.11.18: {}
 
   debug@4.4.3:
@@ -3445,8 +2686,6 @@ snapshots:
 
   detect-libc@2.1.0: {}
 
-  detect-node-es@1.1.0: {}
-
   dir-glob@3.0.1:
     dependencies:
       path-type: 4.0.0
@@ -3578,8 +2817,6 @@ snapshots:
 
   gensync@1.0.0-beta.2: {}
 
-  get-nonce@1.0.1: {}
-
   glob-parent@5.1.2:
     dependencies:
       is-glob: 4.0.3
@@ -3865,14 +3102,6 @@ snapshots:
 
   queue-microtask@1.2.3: {}
 
-  react-day-picker@9.14.0(react@19.1.1):
-    dependencies:
-      '@date-fns/tz': 1.4.1
-      '@tabby_ai/hijri-converter': 1.0.5
-      date-fns: 4.1.0
-      date-fns-jalali: 4.1.0-0
-      react: 19.1.1
-
   react-dom@19.1.1(react@19.1.1):
     dependencies:
       react: 19.1.1
@@ -3880,33 +3109,6 @@ snapshots:
 
   react-refresh@0.17.0: {}
 
-  react-remove-scroll-bar@2.3.8(@types/react@19.1.13)(react@19.1.1):
-    dependencies:
-      react: 19.1.1
-      react-style-singleton: 2.2.3(@types/react@19.1.13)(react@19.1.1)
-      tslib: 2.8.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  react-remove-scroll@2.7.1(@types/react@19.1.13)(react@19.1.1):
-    dependencies:
-      react: 19.1.1
-      react-remove-scroll-bar: 2.3.8(@types/react@19.1.13)(react@19.1.1)
-      react-style-singleton: 2.2.3(@types/react@19.1.13)(react@19.1.1)
-      tslib: 2.8.1
-      use-callback-ref: 1.3.3(@types/react@19.1.13)(react@19.1.1)
-      use-sidecar: 1.1.3(@types/react@19.1.13)(react@19.1.1)
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  react-style-singleton@2.2.3(@types/react@19.1.13)(react@19.1.1):
-    dependencies:
-      get-nonce: 1.0.1
-      react: 19.1.1
-      tslib: 2.8.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
   react@19.1.1: {}
 
   read-yaml-file@2.1.0:
@@ -4048,10 +3250,6 @@ snapshots:
       inherits: 2.0.4
       readable-stream: 3.6.2
 
-  tauri-plugin-pldownloader-api@1.0.1:
-    dependencies:
-      '@tauri-apps/api': 2.8.0
-
   term-size@2.2.1: {}
 
   tinyglobby@0.2.15:
@@ -4069,8 +3267,6 @@ snapshots:
 
   traverse@0.3.9: {}
 
-  tslib@2.8.1: {}
-
   tw-animate-css@1.3.8: {}
 
   typescript@5.8.3: {}
@@ -4098,21 +3294,6 @@ snapshots:
       escalade: 3.2.0
       picocolors: 1.1.1
 
-  use-callback-ref@1.3.3(@types/react@19.1.13)(react@19.1.1):
-    dependencies:
-      react: 19.1.1
-      tslib: 2.8.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
-  use-sidecar@1.1.3(@types/react@19.1.13)(react@19.1.1):
-    dependencies:
-      detect-node-es: 1.1.0
-      react: 19.1.1
-      tslib: 2.8.1
-    optionalDependencies:
-      '@types/react': 19.1.13
-
   use-sync-external-store@1.6.0(react@19.1.1):
     dependencies:
       react: 19.1.1
@@ -4157,9 +3338,3 @@ snapshots:
       archiver-utils: 3.0.4
       compress-commons: 4.1.2
       readable-stream: 3.6.2
-
-  zustand@5.0.8(@types/react@19.1.13)(react@19.1.1)(use-sync-external-store@1.6.0(react@19.1.1)):
-    optionalDependencies:
-      '@types/react': 19.1.13
-      react: 19.1.1
-      use-sync-external-store: 1.6.0(react@19.1.1)
diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 84c8a1d..acbb44e 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -2141,7 +2141,7 @@ dependencies = [
 
 [[package]]
 name = "mpesa2csv"
-version = "0.12.6"
+version = "0.13.0"
 dependencies = [
  "serde",
  "serde_json",
diff --git a/src/components/ui/calendar.tsx b/src/components/ui/calendar.tsx
deleted file mode 100644
index 98d3070..0000000
--- a/src/components/ui/calendar.tsx
+++ /dev/null
@@ -1,142 +0,0 @@
-"use client";
-
-import {
-  ChevronLeftIcon,
-  ChevronRightIcon,
-  ChevronsUpDownIcon,
-} from "lucide-react";
-import type * as React from "react";
-import { DayPicker } from "react-day-picker";
-
-import { cn } from "@/lib/utils";
-
-const buttonClassNames =
-  "relative flex size-(--cell-size) text-base sm:text-sm items-center justify-center rounded-lg text-foreground not-in-data-selected:hover:bg-accent disabled:pointer-events-none disabled:opacity-64 [&_svg:not([class*='opacity-'])]:opacity-80 [&_svg:not([class*='size-'])]:size-4.5 sm:[&_svg:not([class*='size-'])]:size-4 [&_svg]:pointer-events-none [&_svg]:shrink-0";
-
-function Calendar({
-  className,
-  classNames,
-  showOutsideDays = true,
-  components: userComponents,
-  mode = "single",
-  ...props
-}: React.ComponentProps<typeof DayPicker>) {
-  const defaultClassNames = {
-    button_next: buttonClassNames,
-    button_previous: buttonClassNames,
-    caption_label:
-      "text-base sm:text-sm font-medium flex items-center gap-2 h-full",
-    day: "size-(--cell-size) text-sm py-px",
-    day_button: cn(
-      buttonClassNames,
-      "in-[[data-selected]:not(.range-middle)]:transition-[color,background-color,border-radius,box-shadow] in-data-disabled:pointer-events-none focus-visible:z-1 in-data-selected:bg-primary in-data-selected:text-primary-foreground in-data-disabled:text-muted-foreground/70 in-data-disabled:line-through in-data-outside:text-muted-foreground/70 in-data-selected:in-data-outside:text-primary-foreground outline-none focus-visible:ring-ring/50 focus-visible:ring-[3px] in-[.range-start:not(.range-end)]:rounded-e-none in-[.range-end:not(.range-start)]:rounded-s-none in-[.range-middle]:rounded-none in-[.range-middle]:in-data-selected:bg-accent in-[.range-middle]:in-data-selected:text-foreground",
-    ),
-    dropdown: "absolute bg-popover inset-0 opacity-0",
-    dropdown_root:
-      "relative has-focus:border-ring has-focus:ring-ring/50 has-focus:ring-[3px] border border-input shadow-xs/5 rounded-lg px-[calc(--spacing(3)-1px)] h-9 sm:h-8 [&_svg:not([class*='opacity-'])]:opacity-80 [&_svg:not([class*='size-'])]:size-4.5 sm:[&_svg:not([class*='size-'])]:size-4 [&_svg]:pointer-events-none [&_svg]:-me-1",
-    dropdowns:
-      "w-full flex items-center text-base sm:text-sm justify-center h-(--cell-size) gap-1.5 *:[span]:font-medium",
-    hidden: "invisible",
-    month: "w-full",
-    month_caption:
-      "relative mx-(--cell-size) px-1 mb-1 flex h-(--cell-size) items-center justify-center z-2",
-    months: "relative flex flex-col sm:flex-row gap-2",
-    nav: "absolute top-0 flex w-full justify-between z-1",
-    outside:
-      "text-muted-foreground data-selected:bg-accent/50 data-selected:text-muted-foreground",
-    range_end: "range-end",
-    range_middle: "range-middle",
-    range_start: "range-start",
-    today:
-      "*:after:pointer-events-none *:after:absolute *:after:bottom-1 *:after:start-1/2 *:after:z-1 *:after:size-[3px] *:after:-translate-x-1/2 *:after:rounded-full *:after:bg-primary [&[data-selected]:not(.range-middle)>*]:after:bg-background [&[data-disabled]>*]:after:bg-foreground/30 *:after:transition-colors",
-    week_number:
-      "size-(--cell-size) p-0 text-xs font-medium text-muted-foreground/70",
-    weekday:
-      "size-(--cell-size) p-0 text-xs font-medium text-muted-foreground/70",
-  };
-  const mergedClassNames: typeof defaultClassNames = Object.keys(
-    defaultClassNames,
-  ).reduce(
-    (acc, key) => {
-      const userClass = classNames?.[key as keyof typeof classNames];
-      const baseClass =
-        defaultClassNames[key as keyof typeof defaultClassNames];
-
-      acc[key as keyof typeof defaultClassNames] = userClass
-        ? cn(baseClass, userClass)
-        : baseClass;
-
-      return acc;
-    },
-    { ...defaultClassNames } as typeof defaultClassNames,
-  );
-
-  const defaultComponents = {
-    Chevron: ({
-      className,
-      orientation,
-      ...props
-    }: {
-      className?: string;
-      orientation?: "left" | "right" | "up" | "down";
-    }) => {
-      if (orientation === "left") {
-        return (
-          <ChevronLeftIcon
-            className={cn(className, "rtl:rotate-180")}
-            {...props}
-            aria-hidden="true"
-          />
-        );
-      }
-
-      if (orientation === "right") {
-        return (
-          <ChevronRightIcon
-            className={cn(className, "rtl:rotate-180")}
-            {...props}
-            aria-hidden="true"
-          />
-        );
-      }
-
-      return (
-        <ChevronsUpDownIcon
-          className={className}
-          {...props}
-          aria-hidden="true"
-        />
-      );
-    },
-  };
-
-  const mergedComponents = {
-    ...defaultComponents,
-    ...userComponents,
-  };
-
-  const dayPickerProps = {
-    className: cn(
-      "w-fit [--cell-size:--spacing(10)] sm:[--cell-size:--spacing(9)]",
-      className,
-    ),
-    classNames: mergedClassNames,
-    components: mergedComponents,
-    "data-slot": "calendar",
-    formatters: {
-      formatMonthDropdown: (date: Date) =>
-        date.toLocaleString("default", { month: "short" }),
-    } as React.ComponentProps<typeof DayPicker>["formatters"],
-    mode,
-    showOutsideDays,
-    ...props,
-  };
-
-  return (
-    <DayPicker
-      {...(dayPickerProps as React.ComponentProps<typeof DayPicker>)}
-    />
-  );
-}
-
-export { Calendar };
diff --git a/src/services/exportService.ts b/src/services/exportService.ts
index 8abc310..5c0dfb3 100644
--- a/src/services/exportService.ts
+++ b/src/services/exportService.ts
@@ -1,9 +1,10 @@
 import { MPesaStatement, ExportFormat, ExportOptions } from "../types";
 import { CsvService } from "./csvService";
-import { XlsxService } from "./xlsxService";
 import { JsonService } from "./jsonService";
 import { OfxService } from "./ofxService";
 import { QifService } from "./qifService";
+// XlsxService is intentionally NOT statically imported here.
+// ExcelJS (~700 kB) is lazy-loaded only when the user actually exports to XLSX.
 
 export class ExportService {
   static async createDownloadLink(
@@ -14,8 +15,10 @@ export class ExportService {
     switch (format) {
       case ExportFormat.CSV:
         return CsvService.createDownloadLink(statement, options);
-      case ExportFormat.XLSX:
+      case ExportFormat.XLSX: {
+        const { XlsxService } = await import("./xlsxService");
         return await XlsxService.createDownloadLink(statement, options);
+      }
       case ExportFormat.JSON:
         return JsonService.createDownloadLink(statement, options);
       case ExportFormat.OFX:
@@ -33,22 +36,14 @@ export class ExportService {
     format: ExportFormat,
     timestamp?: string
   ): string {
-    switch (format) {
-      case ExportFormat.CSV:
-        return CsvService.getFileName(statement, timestamp);
-      case ExportFormat.XLSX:
-        return XlsxService.getFileName(statement, timestamp);
-      case ExportFormat.JSON:
-        return JsonService.getFileName(statement, timestamp);
-      case ExportFormat.OFX:
-        return OfxService.getFileName(statement, timestamp, "ofx");
-      case ExportFormat.QFX:
-        return OfxService.getFileName(statement, timestamp, "qfx");
-      case ExportFormat.QIF:
-        return QifService.getFileName(statement, timestamp);
-      default:
-        throw new Error(`Unsupported export format: ${format}`);
-    }
+    // Inlined so ExportService.getFileName() never pulls in XlsxService/ExcelJS.
+    const base = statement.fileName
+      ? statement.fileName.replace(/\.[^/.]+$/, "")
+      : "mpesa-statement";
+    const ts =
+      timestamp ||
+      new Date().toISOString().slice(0, 19).replace(/[T:]/g, "-");
+    return `${base}_${ts}.${ExportService.getFileExtension(format)}`;
   }
 
   static getFileExtension(format: ExportFormat): string {
@@ -106,26 +101,29 @@ export class ExportService {
     options?: ExportOptions
   ): Promise<ArrayBuffer> {
     switch (format) {
-      case ExportFormat.CSV:
+      case ExportFormat.CSV: {
         const csvContent = CsvService.convertStatementToCsv(statement, options);
         const BOM = "\uFEFF";
-        const csvWithBOM = BOM + csvContent;
-        return new TextEncoder().encode(csvWithBOM).buffer;
-      case ExportFormat.XLSX:
+        return new TextEncoder().encode(BOM + csvContent).buffer;
+      }
+      case ExportFormat.XLSX: {
+        // Dynamic import keeps ExcelJS out of the initial bundle.
+        const { XlsxService } = await import("./xlsxService");
         return await XlsxService.convertStatementToXlsx(statement, options);
-      case ExportFormat.JSON:
-        const jsonContent = JsonService.convertStatementToJson(
-          statement,
-          options
-        );
+      }
+      case ExportFormat.JSON: {
+        const jsonContent = JsonService.convertStatementToJson(statement, options);
         return new TextEncoder().encode(jsonContent).buffer;
+      }
       case ExportFormat.OFX:
-      case ExportFormat.QFX:
+      case ExportFormat.QFX: {
         const ofxContent = OfxService.convertStatementToOfx(statement, options);
         return new TextEncoder().encode(ofxContent).buffer;
-      case ExportFormat.QIF:
+      }
+      case ExportFormat.QIF: {
         const qifContent = QifService.convertStatementToQif(statement, options);
         return new TextEncoder().encode(qifContent).buffer;
+      }
       default:
         throw new Error(`Unsupported export format: ${format}`);
     }
diff --git a/vite.config.ts b/vite.config.ts
index 779e44c..45a8250 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -15,6 +15,30 @@ export default defineConfig(async () => ({
     },
   },
 
+  build: {
+    // xlsxService is a lazy chunk (loaded on first XLSX export), so its size
+    // is not part of the initial load. Raise the limit to suppress the warning.
+    chunkSizeWarningLimit: 1100,
+    rollupOptions: {
+      output: {
+        manualChunks(id) {
+          // ExcelJS and its analytics sheets load lazily on first XLSX export.
+          // No need to split them here — dynamic import() handles that.
+          // Split the large React vendor chunk for better caching.
+          if (id.includes("node_modules/react") || id.includes("node_modules/react-dom")) {
+            return "vendor-react";
+          }
+          if (id.includes("node_modules/@base-ui")) {
+            return "vendor-base-ui";
+          }
+          if (id.includes("node_modules/lucide-react")) {
+            return "vendor-lucide";
+          }
+        },
+      },
+    },
+  },
+
   // Vite options tailored for Tauri development and only applied in `tauri dev` or `tauri build`
   //
   // 1. prevent Vite from obscuring rust errors