feat: reorganize transaction detail view layout

- Move transaction hash (txid) to first position after title
- Group fields into logical sections with visual dividers:
  Identity (hash, type, status, time), Value (amount, native qty,
  token contract), Parties (from, to), Protocol (calldata/action),
  On-chain (block, nonce, fee, gas price, gas used), Raw data
- Add tx-detail-group CSS class for subtle border separators
- Show on-chain details group wrapper only when data is loaded
- Maintain all existing functionality and copy-to-clipboard behavior

closes #131

README.md

@@ -435,35 +435,25 @@ transitions.
 #### TransactionDetail
 
 - **When**: User tapped a transaction row from AddressDetail or AddressToken.
-- **Elements** (grouped into logical blocks separated by thin rules):
+- **Elements**:
     - "Transaction" heading, "Back" button
-    - **Identity block**:
-        - Transaction hash: full hash (tap to copy) + etherscan link
-        - Type: transaction classification — one of: Native ETH Transfer,
-          ERC-20 Token Transfer, Swap, Token Approval, Contract Call,
-          Contract Creation
-        - Status: "Success" or "Failed"
-    - **Timing block**:
-        - Time: ISO datetime + relative age in parentheses
-        - Block: block number (tap to copy) + etherscan block link
-    - **Value block**:
-        - Amount: value + symbol (bold)
-        - Native quantity: raw integer + unit (shown when available)
-        - Token contract: shown for ERC-20 transfers — color dot + full
-          contract address (tap to copy) + etherscan token link
-        - From: blockie + color dot + full address (tap to copy) + etherscan
-          link; ENS name if available
-        - To: blockie + color dot + full address (tap to copy) + etherscan
-          link; ENS name if available
-    - **Decoded details** (shown for contract calls):
-        - Action name, decoded parameters, token details, swap steps
-    - **Network details** (shown when on-chain data is available):
-        - Nonce: transaction nonce (tap to copy)
-        - Gas price: value in Gwei (tap to copy)
-        - Gas used: integer (tap to copy)
-        - Transaction fee: ETH amount (tap to copy)
-    - **Raw data** (shown when calldata is present):
-        - Full calldata in monospace dashed border
+    - Type: transaction classification — one of: Native ETH Transfer, ERC-20
+      Token Transfer, Swap, Token Approval, Contract Call, Contract Creation
+    - Token contract: shown for ERC-20 transfers — color dot + full contract
+      address (tap to copy) + etherscan token link
+    - Status: "Success" or "Failed"
+    - Time: ISO datetime + relative age in parentheses
+    - Amount: value + symbol (bold)
+    - From: blockie + color dot + full address (tap to copy) + etherscan link
+        - ENS name if available
+    - To: blockie + color dot + full address (tap to copy) + etherscan link
+        - ENS name if available
+    - Transaction hash: full hash (tap to copy) + etherscan link
+    - Block: block number (tap to copy) + etherscan block link
+    - Nonce: transaction nonce (tap to copy)
+    - Transaction fee: ETH amount (tap to copy)
+    - Gas price: value in Gwei (tap to copy)
+    - Gas used: integer (tap to copy)
 - **Transitions**:
     - "Back" → **AddressToken** (if `selectedToken` set) or **AddressDetail**
 

src/popup/index.html

@@ -1066,104 +1066,126 @@
                 </h2>
 
                 <!-- ── Identity ── -->
-                <div class="mb-2">
-                    <div class="text-xs text-muted mb-1">Transaction hash</div>
-                    <div id="tx-detail-hash" class="text-xs break-all"></div>
+                <div class="tx-detail-group mb-1">
+                    <div class="mb-3">
+                        <div class="text-xs text-muted mb-1">
+                            Transaction hash
+                        </div>
+                        <div
+                            id="tx-detail-hash"
+                            class="text-xs break-all"
+                        ></div>
+                    </div>
+                    <div id="tx-detail-type-section" class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">Type</div>
+                        <div
+                            id="tx-detail-type"
+                            class="text-xs font-bold"
+                        ></div>
+                    </div>
+                    <div class="mb-3">
+                        <div class="text-xs text-muted mb-1">Status</div>
+                        <div id="tx-detail-status" class="text-xs"></div>
+                    </div>
+                    <div class="mb-1">
+                        <div class="text-xs text-muted mb-1">Time</div>
+                        <div id="tx-detail-time" class="text-xs"></div>
+                    </div>
                 </div>
-                <div id="tx-detail-type-section" class="mb-2 hidden">
-                    <div class="text-xs text-muted mb-1">Type</div>
-                    <div id="tx-detail-type" class="text-xs font-bold"></div>
-                </div>
-                <div class="mb-2">
-                    <div class="text-xs text-muted mb-1">Status</div>
-                    <div id="tx-detail-status" class="text-xs"></div>
-                </div>
-
-                <hr class="border-border my-3" />
-
-                <!-- ── Timing ── -->
-                <div class="mb-2">
-                    <div class="text-xs text-muted mb-1">Time</div>
-                    <div id="tx-detail-time" class="text-xs"></div>
-                </div>
-                <div id="tx-detail-block-section" class="mb-2 hidden">
-                    <div class="text-xs text-muted mb-1">Block</div>
-                    <div id="tx-detail-block" class="text-xs"></div>
-                </div>
-
-                <hr class="border-border my-3" />
 
                 <!-- ── Value ── -->
-                <div class="mb-2">
-                    <div class="text-xs text-muted mb-1">Amount</div>
-                    <div id="tx-detail-value" class="text-xs"></div>
-                </div>
-                <div class="mb-2 hidden">
-                    <div class="text-xs text-muted mb-1">Native quantity</div>
-                    <div id="tx-detail-native" class="text-xs"></div>
-                </div>
-                <div id="tx-detail-token-contract-section" class="mb-2 hidden">
-                    <div class="text-xs text-muted mb-1">Token contract</div>
+                <div class="tx-detail-group mb-1">
+                    <div class="mb-3">
+                        <div class="text-xs text-muted mb-1">Amount</div>
+                        <div id="tx-detail-value" class="text-xs"></div>
+                    </div>
+                    <div class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">
+                            Native quantity
+                        </div>
+                        <div id="tx-detail-native" class="text-xs"></div>
+                    </div>
                     <div
-                        id="tx-detail-token-contract"
-                        class="text-xs break-all"
-                    ></div>
-                </div>
-                <div class="mb-2">
-                    <div class="text-xs text-muted mb-1">From</div>
-                    <div id="tx-detail-from" class="text-xs break-all"></div>
-                </div>
-                <div class="mb-2">
-                    <div class="text-xs text-muted mb-1">To</div>
-                    <div id="tx-detail-to" class="text-xs break-all"></div>
-                </div>
-
-                <!-- ── Decoded details ── -->
-                <div id="tx-detail-calldata-section" class="hidden">
-                    <hr class="border-border my-3" />
-                    <div
-                        id="tx-detail-calldata-well"
-                        class="mb-2 border border-border border-dashed p-2"
+                        id="tx-detail-token-contract-section"
+                        class="mb-1 hidden"
                     >
-                        <div class="text-xs text-muted mb-1">Action</div>
+                        <div class="text-xs text-muted mb-1">
+                            Token contract
+                        </div>
                         <div
-                            id="tx-detail-calldata-action"
-                            class="text-xs font-bold mb-2"
-                        ></div>
-                        <div
-                            id="tx-detail-calldata-details"
-                            class="text-xs"
+                            id="tx-detail-token-contract"
+                            class="text-xs break-all"
                         ></div>
                     </div>
                 </div>
 
-                <!-- ── Network details ── -->
-                <div id="tx-detail-network-section" class="hidden">
-                    <hr class="border-border my-3" />
-                    <div id="tx-detail-nonce-section" class="mb-2 hidden">
+                <!-- ── Parties ── -->
+                <div class="tx-detail-group mb-1">
+                    <div class="mb-3">
+                        <div class="text-xs text-muted mb-1">From</div>
+                        <div
+                            id="tx-detail-from"
+                            class="text-xs break-all"
+                        ></div>
+                    </div>
+                    <div class="mb-1">
+                        <div class="text-xs text-muted mb-1">To</div>
+                        <div id="tx-detail-to" class="text-xs break-all"></div>
+                    </div>
+                </div>
+
+                <!-- ── Protocol ── -->
+                <div id="tx-detail-calldata-section" class="mb-1 hidden">
+                    <div class="tx-detail-group mb-1">
+                        <div
+                            id="tx-detail-calldata-well"
+                            class="border border-border border-dashed p-2"
+                        >
+                            <div class="text-xs text-muted mb-1">Action</div>
+                            <div
+                                id="tx-detail-calldata-action"
+                                class="text-xs font-bold mb-2"
+                            ></div>
+                            <div
+                                id="tx-detail-calldata-details"
+                                class="text-xs"
+                            ></div>
+                        </div>
+                    </div>
+                </div>
+
+                <!-- ── On-chain details ── -->
+                <div
+                    id="tx-detail-onchain-group"
+                    class="tx-detail-group mb-1 hidden"
+                >
+                    <div id="tx-detail-block-section" class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">Block</div>
+                        <div id="tx-detail-block" class="text-xs"></div>
+                    </div>
+                    <div id="tx-detail-nonce-section" class="mb-3 hidden">
                         <div class="text-xs text-muted mb-1">Nonce</div>
                         <div id="tx-detail-nonce" class="text-xs"></div>
                     </div>
-                    <div id="tx-detail-gasprice-section" class="mb-2 hidden">
-                        <div class="text-xs text-muted mb-1">Gas price</div>
-                        <div id="tx-detail-gasprice" class="text-xs"></div>
-                    </div>
-                    <div id="tx-detail-gasused-section" class="mb-2 hidden">
-                        <div class="text-xs text-muted mb-1">Gas used</div>
-                        <div id="tx-detail-gasused" class="text-xs"></div>
-                    </div>
-                    <div id="tx-detail-fee-section" class="mb-2 hidden">
+                    <div id="tx-detail-fee-section" class="mb-3 hidden">
                         <div class="text-xs text-muted mb-1">
                             Transaction fee
                         </div>
                         <div id="tx-detail-fee" class="text-xs"></div>
                     </div>
+                    <div id="tx-detail-gasprice-section" class="mb-3 hidden">
+                        <div class="text-xs text-muted mb-1">Gas price</div>
+                        <div id="tx-detail-gasprice" class="text-xs"></div>
+                    </div>
+                    <div id="tx-detail-gasused-section" class="mb-1 hidden">
+                        <div class="text-xs text-muted mb-1">Gas used</div>
+                        <div id="tx-detail-gasused" class="text-xs"></div>
+                    </div>
                 </div>
 
                 <!-- ── Raw data ── -->
-                <div id="tx-detail-rawdata-section" class="hidden">
-                    <hr class="border-border my-3" />
-                    <div class="mb-2">
+                <div id="tx-detail-rawdata-section" class="mb-4 hidden">
+                    <div class="tx-detail-group">
                         <div class="text-xs text-muted mb-1">Raw data</div>
                         <div
                             id="tx-detail-rawdata"

src/popup/styles/main.css

@@ -44,3 +44,11 @@ body {
         background-color 225ms ease-out,
         color 225ms ease-out;
 }
+
+/* Transaction detail view — visual grouping of related fields */
+.tx-detail-group {
+    border-bottom: 1px solid var(--color-border-light);
+    padding-bottom: 0.5rem;
+    margin-bottom: 0.5rem;
+    padding-top: 0.25rem;
+}

src/popup/views/transactionDetail.js

@@ -190,14 +190,15 @@ function render() {
     const rawDataSection = $("tx-detail-rawdata-section");
     if (rawDataSection) rawDataSection.classList.add("hidden");
 
-    // Hide on-chain detail sections until populated
+    // Hide on-chain detail sections (and their group wrapper) until populated
+    const onchainGroup = $("tx-detail-onchain-group");
+    if (onchainGroup) onchainGroup.classList.add("hidden");
     for (const id of [
         "tx-detail-block-section",
         "tx-detail-nonce-section",
         "tx-detail-fee-section",
         "tx-detail-gasprice-section",
         "tx-detail-gasused-section",
-        "tx-detail-network-section",
     ]) {
         const el = $(id);
         if (el) el.classList.add("hidden");
@@ -286,10 +287,11 @@ function populateOnChainDetails(txData) {
         );
     }
 
-    // Show the network details wrapper if any child section is visible
-    const networkWrapper = $("tx-detail-network-section");
-    if (networkWrapper) {
+    // Show the on-chain details group if any child section is visible
+    const onchainGroup = $("tx-detail-onchain-group");
+    if (onchainGroup) {
         const hasVisible = [
+            "tx-detail-block-section",
             "tx-detail-nonce-section",
             "tx-detail-fee-section",
             "tx-detail-gasprice-section",
@@ -298,7 +300,9 @@ function populateOnChainDetails(txData) {
             const el = $(id);
             return el && !el.classList.contains("hidden");
         });
-        if (hasVisible) networkWrapper.classList.remove("hidden");
+        if (hasVisible) {
+            onchainGroup.classList.remove("hidden");
+        }
     }
 
     // Bind copy handlers for newly added elements