Merge branch 'main' into feature/import-xprv

Merge all three wallet import methods (recovery phrase, private key,
extended key/xprv) into one tabbed add-wallet view with a mode selector.
This fixes the blank import-xprv render (it was missing from the VIEWS
array) and the broken back-button navigation from the separate import
views.

- Add tab selector: Recovery Phrase | Private Key | Extended Key (xprv)
- Share password fields across all modes
- Remove separate import-key and import-xprv views and modules
- Add duplicate wallet detection for private key imports
- All tabs follow affordance policy (visible border + hover state)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/popup/index.html

@@ -58,27 +58,24 @@
                 <h2 class="font-bold mb-2">Add Wallet</h2>
 
                 <!-- Mode selector tabs -->
-                <div
-                    class="flex border-b border-border mb-3"
-                    id="add-wallet-tabs"
-                >
+                <div class="flex gap-1 mb-3">
                     <button
                         id="tab-mnemonic"
-                        class="px-2 py-1 cursor-pointer text-xs border-b-2 border-fg font-bold"
+                        class="border border-border px-2 py-1 cursor-pointer text-xs hover:bg-fg hover:text-bg bg-fg text-bg"
                     >
-                        From Phrase
+                        Recovery Phrase
                     </button>
                     <button
                         id="tab-privkey"
-                        class="px-2 py-1 cursor-pointer text-xs border-b-2 border-transparent text-muted hover:text-fg"
+                        class="border border-border px-2 py-1 cursor-pointer text-xs hover:bg-fg hover:text-bg"
                     >
-                        From Key
+                        Private Key
                     </button>
                     <button
                         id="tab-xprv"
-                        class="px-2 py-1 cursor-pointer text-xs border-b-2 border-transparent text-muted hover:text-fg"
+                        class="border border-border px-2 py-1 cursor-pointer text-xs hover:bg-fg hover:text-bg"
                     >
-                        From xprv
+                        Extended Key (xprv)
                     </button>
                 </div>
 

src/popup/views/addWallet.js

@@ -27,11 +27,8 @@ function switchMode(mode) {
     currentMode = mode;
     for (const m of MODES) {
         $("add-wallet-section-" + m).classList.toggle("hidden", m !== mode);
-        const tab = $("tab-" + m);
-        tab.classList.toggle("border-fg", m === mode);
-        tab.classList.toggle("font-bold", m === mode);
-        tab.classList.toggle("border-transparent", m !== mode);
-        tab.classList.toggle("text-muted", m !== mode);
+        $("tab-" + m).classList.toggle("bg-fg", m === mode);
+        $("tab-" + m).classList.toggle("text-bg", m === mode);
     }
     $("add-wallet-password-hint").textContent = PASSWORD_HINTS[mode];
 }