fix: include timezone offset in all ISO timestamp displays

All isoDate() functions now append the local timezone offset (e.g. +02:00)
to displayed timestamps. The Uniswap deadline display now retains the UTC
'Z' suffix instead of stripping it.

Closes #116

src/popup/index.html

@@ -107,8 +107,7 @@
                     </div>
                     <div
                         id="add-wallet-phrase-warning"
-                        class="text-xs mb-2 border border-border border-dashed p-2"
-                        style="visibility: hidden"
+                        class="text-xs mb-2 border border-border border-dashed p-2 hidden"
                     >
                         Write these words down and keep them safe. Anyone with
                         them can take your funds; if you lose them, your wallet
@@ -376,8 +375,7 @@
                 </p>
                 <div
                     id="export-privkey-flash"
-                    class="text-xs mb-2 min-h-[1.25rem]"
-                    style="visibility: hidden"
+                    class="text-xs mb-2 hidden"
                 ></div>
                 <div id="export-privkey-password-section" class="mb-2">
                     <label class="block mb-1">Password</label>
@@ -581,17 +579,13 @@
                     <div class="text-xs text-muted mb-1">Your balance</div>
                     <div id="confirm-balance" class="text-xs"></div>
                 </div>
-                <div id="confirm-fee" class="mb-3" style="visibility: hidden">
+                <div id="confirm-fee" class="mb-3 hidden">
                     <div class="text-xs text-muted mb-1">
                         Estimated network fee
                     </div>
                     <div id="confirm-fee-amount" class="text-xs"></div>
                 </div>
-                <div
-                    id="confirm-warnings"
-                    class="mb-2"
-                    style="visibility: hidden"
-                ></div>
+                <div id="confirm-warnings" class="mb-2 hidden"></div>
                 <div
                     id="confirm-recipient-warning"
                     class="mb-2"
@@ -607,8 +601,7 @@
                 </div>
                 <div
                     id="confirm-errors"
-                    class="mb-2 border border-border border-dashed p-2"
-                    style="visibility: hidden; min-height: 1.25rem"
+                    class="mb-2 border border-border border-dashed p-2 hidden"
                 ></div>
                 <div class="mb-2">
                     <label class="block mb-1 text-xs">Password</label>
@@ -621,7 +614,6 @@
                 <div
                     id="confirm-tx-password-error"
                     class="text-xs mb-2 min-h-[1.25rem]"
-                    style="visibility: hidden"
                 ></div>
                 <button
                     id="btn-confirm-send"
@@ -736,8 +728,7 @@
                 </button>
                 <div
                     id="receive-erc20-warning"
-                    class="text-xs border border-border border-dashed p-2 mt-3"
-                    style="visibility: hidden"
+                    class="text-xs border border-border border-dashed p-2 mt-3 hidden"
                 ></div>
             </div>
 
@@ -765,8 +756,7 @@
                 </div>
                 <div
                     id="add-token-info"
-                    class="text-xs text-muted mb-2 min-h-[1.25rem]"
-                    style="visibility: hidden"
+                    class="text-xs text-muted mb-2 hidden"
                 ></div>
                 <div class="mb-2">
                     <label class="block mb-1 text-xs text-muted"
@@ -824,7 +814,7 @@
                 <div class="bg-well p-3 mx-1 mb-3">
                     <h3 class="font-bold mb-1">Display</h3>
                     <label
-                        class="text-xs flex items-center gap-1 cursor-pointer mb-2"
+                        class="text-xs flex items-center gap-1 cursor-pointer"
                     >
                         <input
                             type="checkbox"
@@ -832,17 +822,6 @@
                         />
                         Show tracked tokens with zero balance
                     </label>
-                    <div class="text-xs flex items-center gap-1">
-                        <label for="settings-theme">Theme:</label>
-                        <select
-                            id="settings-theme"
-                            class="border border-border p-1 bg-bg text-fg text-xs cursor-pointer"
-                        >
-                            <option value="system">System</option>
-                            <option value="light">Light</option>
-                            <option value="dark">Dark</option>
-                        </select>
-                    </div>
                 </div>
 
                 <div class="bg-well p-3 mx-1 mb-3">
@@ -959,8 +938,7 @@
                 </p>
                 <div
                     id="delete-wallet-flash"
-                    class="text-xs text-red-500 mb-2 min-h-[1.25rem]"
-                    style="visibility: hidden"
+                    class="text-xs text-red-500 mb-2 hidden"
                 ></div>
                 <div class="mb-2">
                     <label class="block mb-1">Password</label>
@@ -1035,8 +1013,7 @@
                     />
                     <div
                         id="settings-addtoken-info"
-                        class="text-xs text-muted mt-1 min-h-[1.25rem]"
-                        style="visibility: hidden"
+                        class="text-xs text-muted mt-1 hidden"
                     ></div>
                     <button
                         id="btn-settings-addtoken-manual"
@@ -1162,8 +1139,7 @@
                 </div>
                 <div
                     id="approve-tx-error"
-                    class="text-xs mb-2 border border-border border-dashed p-1 min-h-[1.25rem]"
-                    style="visibility: hidden"
+                    class="text-xs mb-2 border border-border border-dashed p-1 min-h-[1.25rem] hidden"
                 ></div>
                 <div class="flex justify-between">
                     <button
@@ -1191,10 +1167,8 @@
 
                 <div
                     id="approve-sign-danger-warning"
-                    class="mb-3 p-2 text-xs font-bold"
+                    class="hidden mb-3 p-2 text-xs font-bold"
                     style="
-                        visibility: hidden;
-                        min-height: 1.25rem;
                         background: #fee2e2;
                         color: #991b1b;
                         border: 2px solid #dc2626;
@@ -1231,8 +1205,7 @@
                 </div>
                 <div
                     id="approve-sign-error"
-                    class="text-xs mb-2 border border-border border-dashed p-1 min-h-[1.25rem]"
-                    style="visibility: hidden"
+                    class="text-xs mb-2 border border-border border-dashed p-1 min-h-[1.25rem] hidden"
                 ></div>
                 <div class="flex justify-between">
                     <button

src/popup/index.js

@@ -6,7 +6,6 @@ const { state, saveState, loadState } = require("../shared/state");
 const { refreshPrices } = require("../shared/prices");
 const { refreshBalances } = require("../shared/balances");
 const { $, showView } = require("./views/helpers");
-const { applyTheme } = require("./theme");
 
 const home = require("./views/home");
 const welcome = require("./views/welcome");
@@ -177,7 +176,6 @@ async function init() {
     }
 
     await loadState();
-    applyTheme(state.theme);
 
     // Auto-default active address
     if (

src/popup/styles/main.css

@@ -15,18 +15,6 @@
     --color-section: #dddddd;
 }
 
-html.dark {
-    --color-bg: #000000;
-    --color-fg: #ffffff;
-    --color-muted: #999999;
-    --color-border: #ffffff;
-    --color-border-light: #333333;
-    --color-hover: #111111;
-    --color-well: #0a0a0a;
-    --color-danger-well: #1a0000;
-    --color-section: #222222;
-}
-
 body {
     width: 396px;
     overflow-x: hidden;
@@ -41,6 +29,6 @@ body {
 
 .copy-flash-fade {
     transition:
-        background-color 225ms ease-out,
-        color 225ms ease-out;
+        background-color 300ms ease-out,
+        color 300ms ease-out;
 }

src/popup/theme.js

@@ -1,33 +0,0 @@
-// Theme management: applies light/dark class to <html> based on preference.
-
-let mediaQuery = null;
-let mediaHandler = null;
-
-function applyTheme(theme) {
-    // Clean up previous system listener
-    if (mediaQuery && mediaHandler) {
-        mediaQuery.removeEventListener("change", mediaHandler);
-        mediaHandler = null;
-    }
-
-    if (theme === "dark") {
-        document.documentElement.classList.add("dark");
-    } else if (theme === "light") {
-        document.documentElement.classList.remove("dark");
-    } else {
-        // system
-        mediaQuery = window.matchMedia("(prefers-color-scheme: dark)");
-        const update = () => {
-            if (mediaQuery.matches) {
-                document.documentElement.classList.add("dark");
-            } else {
-                document.documentElement.classList.remove("dark");
-            }
-        };
-        mediaHandler = update;
-        mediaQuery.addEventListener("change", update);
-        update();
-    }
-}
-
-module.exports = { applyTheme };

src/popup/views/addToken.js

@@ -7,8 +7,7 @@ const { log } = require("../../shared/log");
 
 function show() {
     $("add-token-address").value = "";
-    $("add-token-info").textContent = "";
-    $("add-token-info").style.visibility = "hidden";
+    $("add-token-info").classList.add("hidden");
     const list = $("common-token-list");
     list.innerHTML = getTopTokens(25)
         .map(
@@ -46,7 +45,7 @@ function init(ctx) {
         }
         const infoEl = $("add-token-info");
         infoEl.textContent = "Looking up token...";
-        infoEl.style.visibility = "visible";
+        infoEl.classList.remove("hidden");
         log.debugf("Looking up token contract", contractAddr);
         try {
             const info = await lookupTokenInfo(contractAddr, state.rpcUrl);
@@ -64,8 +63,7 @@ function init(ctx) {
             const detail = e.shortMessage || e.message || String(e);
             log.errorf("Token lookup failed for", contractAddr, detail);
             showFlash(detail);
-            infoEl.textContent = "";
-            infoEl.style.visibility = "hidden";
+            infoEl.classList.add("hidden");
         }
     });
 

src/popup/views/addWallet.js

@@ -71,7 +71,7 @@ function show() {
     $("import-xprv-key").value = "";
     $("add-wallet-password").value = "";
     $("add-wallet-password-confirm").value = "";
-    $("add-wallet-phrase-warning").style.visibility = "hidden";
+    $("add-wallet-phrase-warning").classList.add("hidden");
     switchMode("mnemonic");
     showView("add-wallet");
 }
@@ -281,7 +281,7 @@ function init(ctx) {
     // Generate mnemonic
     $("btn-generate-phrase").addEventListener("click", () => {
         $("wallet-mnemonic").value = generateMnemonic();
-        $("add-wallet-phrase-warning").style.visibility = "visible";
+        $("add-wallet-phrase-warning").classList.remove("hidden");
     });
 
     // Import / confirm

src/popup/views/addressDetail.js

@@ -95,6 +95,10 @@ function show() {
 function isoDate(timestamp) {
     const d = new Date(timestamp * 1000);
     const pad = (n) => String(n).padStart(2, "0");
+    const off = -d.getTimezoneOffset();
+    const sign = off >= 0 ? "+" : "-";
+    const absOff = Math.abs(off);
+    const tz = sign + pad(Math.floor(absOff / 60)) + ":" + pad(absOff % 60);
     return (
         d.getFullYear() +
         "-" +
@@ -106,7 +110,8 @@ function isoDate(timestamp) {
         ":" +
         pad(d.getMinutes()) +
         ":" +
-        pad(d.getSeconds())
+        pad(d.getSeconds()) +
+        tz
     );
 }
 
@@ -312,8 +317,8 @@ function init(_ctx) {
         $("export-privkey-address").textContent = addr.address;
         $("export-privkey-address").dataset.full = addr.address;
         $("export-privkey-password").value = "";
+        $("export-privkey-flash").classList.add("hidden");
         $("export-privkey-flash").textContent = "";
-        $("export-privkey-flash").style.visibility = "hidden";
         $("export-privkey-password-section").classList.remove("hidden");
         $("export-privkey-result").classList.add("hidden");
         $("export-privkey-value").textContent = "";
@@ -324,7 +329,7 @@ function init(_ctx) {
         const password = $("export-privkey-password").value;
         if (!password) {
             $("export-privkey-flash").textContent = "Password is required.";
-            $("export-privkey-flash").style.visibility = "visible";
+            $("export-privkey-flash").classList.remove("hidden");
             return;
         }
         const btn = $("btn-export-privkey-confirm");
@@ -345,10 +350,10 @@ function init(_ctx) {
             $("export-privkey-password-section").classList.add("hidden");
             $("export-privkey-value").textContent = privateKey;
             $("export-privkey-result").classList.remove("hidden");
-            $("export-privkey-flash").style.visibility = "hidden";
+            $("export-privkey-flash").classList.add("hidden");
         } catch {
             $("export-privkey-flash").textContent = "Wrong password.";
-            $("export-privkey-flash").style.visibility = "visible";
+            $("export-privkey-flash").classList.remove("hidden");
         } finally {
             btn.disabled = false;
             btn.classList.remove("text-muted");

src/popup/views/addressToken.js

@@ -48,6 +48,10 @@ function etherscanAddressLink(address) {
 function isoDate(timestamp) {
     const d = new Date(timestamp * 1000);
     const pad = (n) => String(n).padStart(2, "0");
+    const off = -d.getTimezoneOffset();
+    const sign = off >= 0 ? "+" : "-";
+    const absOff = Math.abs(off);
+    const tz = sign + pad(Math.floor(absOff / 60)) + ":" + pad(absOff % 60);
     return (
         d.getFullYear() +
         "-" +
@@ -59,7 +63,8 @@ function isoDate(timestamp) {
         ":" +
         pad(d.getMinutes()) +
         ":" +
-        pad(d.getSeconds())
+        pad(d.getSeconds()) +
+        tz
     );
 }
 

src/popup/views/approval.js

@@ -269,7 +269,7 @@ function showTxApproval(details) {
     }
 
     $("approve-tx-password").value = "";
-    hideError("approve-tx-error");
+    $("approve-tx-error").classList.add("hidden");
 
     showView("approve-tx");
 }
@@ -351,10 +351,10 @@ function showSignApproval(details) {
     if (warningEl) {
         if (sp.dangerWarning) {
             warningEl.textContent = sp.dangerWarning;
-            warningEl.style.visibility = "visible";
+            warningEl.classList.remove("hidden");
         } else {
             warningEl.textContent = "";
-            warningEl.style.visibility = "hidden";
+            warningEl.classList.add("hidden");
         }
     }
 

src/popup/views/confirmTx.js

@@ -186,10 +186,9 @@ function show(txInfo) {
                     `<div class="border border-border border-dashed p-2 mb-1 text-xs font-bold">WARNING: ${w}</div>`,
             )
             .join("");
-        warningsEl.style.visibility = "visible";
+        warningsEl.classList.remove("hidden");
     } else {
-        warningsEl.innerHTML = "";
-        warningsEl.style.visibility = "hidden";
+        warningsEl.classList.add("hidden");
     }
 
     // Check for errors
@@ -227,12 +226,11 @@ function show(txInfo) {
         errorsEl.innerHTML = errors
             .map((e) => `<div class="text-xs">${e}</div>`)
             .join("");
-        errorsEl.style.visibility = "visible";
+        errorsEl.classList.remove("hidden");
         sendBtn.disabled = true;
         sendBtn.classList.add("text-muted");
     } else {
-        errorsEl.innerHTML = "";
-        errorsEl.style.visibility = "hidden";
+        errorsEl.classList.add("hidden");
         sendBtn.disabled = false;
         sendBtn.classList.remove("text-muted");
     }
@@ -242,7 +240,7 @@ function show(txInfo) {
     hideError("confirm-tx-password-error");
 
     // Gas estimate — show placeholder then fetch async
-    $("confirm-fee").style.visibility = "visible";
+    $("confirm-fee").classList.remove("hidden");
     $("confirm-fee-amount").textContent = "Estimating...";
     state.viewData = { pendingTx: txInfo };
     showView("confirm-tx");

src/popup/views/deleteWallet.js

@@ -12,7 +12,7 @@ function show(walletIdx) {
         wallet.name || "Wallet " + (walletIdx + 1);
     $("delete-wallet-password").value = "";
     $("delete-wallet-flash").textContent = "";
-    $("delete-wallet-flash").style.visibility = "hidden";
+    $("delete-wallet-flash").classList.add("hidden");
     showView("delete-wallet-confirm");
 }
 
@@ -29,14 +29,14 @@ function init(_ctx) {
         if (!pw) {
             $("delete-wallet-flash").textContent =
                 "Please enter your password.";
-            $("delete-wallet-flash").style.visibility = "visible";
+            $("delete-wallet-flash").classList.remove("hidden");
             return;
         }
 
         if (deleteWalletIndex === null) {
             $("delete-wallet-flash").textContent =
                 "No wallet selected for deletion.";
-            $("delete-wallet-flash").style.visibility = "visible";
+            $("delete-wallet-flash").classList.remove("hidden");
             return;
         }
 
@@ -52,7 +52,7 @@ function init(_ctx) {
             await decryptWithPassword(wallet.encryptedSecret, pw);
         } catch (_e) {
             $("delete-wallet-flash").textContent = "Wrong password.";
-            $("delete-wallet-flash").style.visibility = "visible";
+            $("delete-wallet-flash").classList.remove("hidden");
             btn.disabled = false;
             btn.classList.remove("text-muted");
             return;

src/popup/views/helpers.js

@@ -40,13 +40,11 @@ function $(id) {
 function showError(id, msg) {
     const el = $(id);
     el.textContent = msg;
-    el.style.visibility = "visible";
+    el.classList.remove("hidden");
 }
 
 function hideError(id) {
-    const el = $(id);
-    el.textContent = "";
-    el.style.visibility = "hidden";
+    $(id).classList.add("hidden");
 }
 
 function showView(name) {
@@ -228,6 +226,10 @@ function formatAddressHtml(address, ensName, maxLen, title) {
 function isoDate(timestamp) {
     const d = new Date(timestamp * 1000);
     const pad = (n) => String(n).padStart(2, "0");
+    const off = -d.getTimezoneOffset();
+    const sign = off >= 0 ? "+" : "-";
+    const absOff = Math.abs(off);
+    const tz = sign + pad(Math.floor(absOff / 60)) + ":" + pad(absOff % 60);
     return (
         d.getFullYear() +
         "-" +
@@ -239,7 +241,8 @@ function isoDate(timestamp) {
         ":" +
         pad(d.getMinutes()) +
         ":" +
-        pad(d.getSeconds())
+        pad(d.getSeconds()) +
+        tz
     );
 }
 
@@ -269,8 +272,8 @@ function flashCopyFeedback(el) {
         el.classList.add("copy-flash-fade");
         setTimeout(() => {
             el.classList.remove("copy-flash-fade");
-        }, 275);
-    }, 75);
+        }, 350);
+    }, 100);
 }
 
 module.exports = {

src/popup/views/receive.js

@@ -53,10 +53,9 @@ function show() {
             "This is an ERC-20 token. Only send " +
             symbol +
             " on the Ethereum network to this address. Sending tokens on other networks will result in permanent loss.";
-        warningEl.style.visibility = "visible";
+        warningEl.classList.remove("hidden");
     } else {
-        warningEl.textContent = "";
-        warningEl.style.visibility = "hidden";
+        warningEl.classList.add("hidden");
     }
     showView("receive");
 }

src/popup/views/settings.js

@@ -1,5 +1,4 @@
 const { $, showView, showFlash, escapeHtml } = require("./helpers");
-const { applyTheme } = require("../theme");
 const { state, saveState } = require("../../shared/state");
 const { ETHEREUM_MAINNET_CHAIN_ID } = require("../../shared/constants");
 const { log, debugFetch } = require("../../shared/log");
@@ -215,13 +214,6 @@ function init(ctx) {
         await saveState();
     });
 
-    $("settings-theme").value = state.theme;
-    $("settings-theme").addEventListener("change", async () => {
-        state.theme = $("settings-theme").value;
-        await saveState();
-        applyTheme(state.theme);
-    });
-
     $("settings-hide-low-holders").checked = state.hideLowHolderTokens;
     $("settings-hide-low-holders").addEventListener("change", async () => {
         state.hideLowHolderTokens = $("settings-hide-low-holders").checked;

src/popup/views/settingsAddToken.js

@@ -73,8 +73,7 @@ function renderDropdown() {
 
 function show() {
     $("settings-addtoken-address").value = "";
-    $("settings-addtoken-info").textContent = "";
-    $("settings-addtoken-info").style.visibility = "hidden";
+    $("settings-addtoken-info").classList.add("hidden");
     renderTop10();
     renderDropdown();
     showView("settings-addtoken");
@@ -130,7 +129,7 @@ function init(_ctx) {
         }
         const infoEl = $("settings-addtoken-info");
         infoEl.textContent = "Looking up token...";
-        infoEl.style.visibility = "visible";
+        infoEl.classList.remove("hidden");
         log.debugf("Looking up token contract", addr);
         try {
             const info = await lookupTokenInfo(addr, state.rpcUrl);
@@ -144,8 +143,7 @@ function init(_ctx) {
             await saveState();
             showFlash("Added " + info.symbol);
             $("settings-addtoken-address").value = "";
-            infoEl.textContent = "";
-            infoEl.style.visibility = "hidden";
+            infoEl.classList.add("hidden");
             renderTop10();
             renderDropdown();
             ctx.doRefreshAndRender();
@@ -153,8 +151,7 @@ function init(_ctx) {
             const detail = e.shortMessage || e.message || String(e);
             log.errorf("Token lookup failed for", addr, detail);
             showFlash(detail);
-            infoEl.textContent = "";
-            infoEl.style.visibility = "hidden";
+            infoEl.classList.add("hidden");
         }
     });
 }

src/shared/state.js

@@ -25,7 +25,6 @@ const DEFAULT_STATE = {
     dustThresholdGwei: 100000,
     fraudContracts: [],
     tokenHolderCache: {},
-    theme: "system",
 };
 
 const state = {
@@ -56,7 +55,6 @@ async function saveState() {
         dustThresholdGwei: state.dustThresholdGwei,
         fraudContracts: state.fraudContracts,
         tokenHolderCache: state.tokenHolderCache,
-        theme: state.theme,
         currentView: state.currentView,
         selectedWallet: state.selectedWallet,
         selectedAddress: state.selectedAddress,
@@ -112,7 +110,6 @@ async function loadState() {
                 : 100000;
         state.fraudContracts = saved.fraudContracts || [];
         state.tokenHolderCache = saved.tokenHolderCache || {};
-        state.theme = saved.theme || "system";
         state.currentView = saved.currentView || null;
         state.selectedWallet =
             saved.selectedWallet !== undefined ? saved.selectedWallet : null;

src/shared/uniswap.js

@@ -487,7 +487,10 @@ function decode(data, toAddress) {
         const deadlineDate = new Date(Number(deadline) * 1000);
         details.push({
             label: "Deadline",
-            value: deadlineDate.toISOString().replace("T", " ").slice(0, 19),
+            value: deadlineDate
+                .toISOString()
+                .replace("T", " ")
+                .replace(".000Z", "Z"),
         });
 
         return {