fix: session-create + settings edge cases (double-tap, biometric stuck, recent-dir dupes) (#133)

Four bugs from a review of session creation, the sessions list, and settings
(lower-severity than the core-path hunts — the core is now well-hardened):

1. Double-tap on the new-session FAB / 'Use this folder' created duplicate
   sessions (isCreating state lags a render). Added a synchronous re-entrancy
   ref guard.
2. 'Require biometric for messages' got stuck ON and enforced with no UI escape
   after turning off the parent 'Require biometric to open' toggle (the child
   switch is then disabled). authenticateForMessage now also gates on the parent.
3. Session-create failure on the default path silently closed the modal with no
   feedback (only the dir path alerted). Both paths now alert; message made generic.
4. Recent-directories got duplicate entries ('/x' vs '/x/') and a mismatched
   'current directory' highlight. switchDirectory/addRecentDirectory now
   stripTrailingSlash.

typecheck clean, 199 tests, i18n parity.


Claude-Session: https://claude.ai/code/session_01T12AhSnQVrSxNnvwfCx2z6

Co-authored-by: engineer <engineer@macbookpro.lan>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/lib/i18n/en.json

@@ -258,7 +258,7 @@
       "deleteMessage": "Delete \"{{title}}\"?",
       "deleteFailedTitle": "Delete failed",
       "deleteFailedMessage": "Could not delete the session. Please try again.",
-      "createFailedMessage": "Failed to create session in that directory."
+      "createFailedMessage": "Failed to create session. Check your connection and try again."
     },
     "empty": {
       "noConnectionTitle": "No Connection",

src/lib/i18n/zh-Hans.json

@@ -258,7 +258,7 @@
       "deleteMessage": "删除 \"{{title}}\"？",
       "deleteFailedTitle": "删除失败",
       "deleteFailedMessage": "无法删除该会话。请重试。",
-      "createFailedMessage": "无法在该目录中创建会话。"
+      "createFailedMessage": "创建会话失败。请检查网络连接后重试。"
     },
     "empty": {
       "noConnectionTitle": "无连接",

src/stores/auth.ts

@@ -108,7 +108,11 @@ export const useAuth = create<AuthState>((set, get) => ({
     const { settings, hasBiometrics, isAuthenticated } = get()
 
     if (!isAuthenticated) return false
-    if (!settings.requireBiometricForMessages || !hasBiometrics) return true
+    // The per-message lock is a sub-feature of the app-lock: only enforce it
+    // when the parent "Require biometric to open" is also on. Otherwise, after
+    // turning the parent off, the (now-disabled) messages toggle could stay
+    // stuck ON and keep prompting on every send with no way to clear it.
+    if (!settings.requireBiometric || !settings.requireBiometricForMessages || !hasBiometrics) return true
 
     try {
       const result = await LocalAuthentication.authenticateAsync({

src/stores/connections.ts

@@ -6,6 +6,7 @@ import { createClient, type Client, type Project } from "../lib/sdk"
 import { addBreadcrumb } from "../lib/sentry"
 import { AnalyticsEvent, classifyConnectionError, track, type ConnectionTestSource } from "../lib/analytics"
 import { buildAuth } from "../lib/auth"
+import { stripTrailingSlash } from "../lib/path-utils"
 
 const CONNECTIONS_KEY = "opencode_connections"
 const PASSWORDS_PREFIX = "opencode_password_"
@@ -345,8 +346,11 @@ export const useConnections = create<ConnectionsState>((set, get) => ({
   switchDirectory: async (directory) => {
     const active = get().activeConnection
     if (!active) return
-    // Update connection directory and recreate client
-    const dir = directory?.trim() || undefined
+    // Update connection directory and recreate client. Normalize trailing
+    // slashes so "/home/user" and "/home/user/" don't diverge (recent-dir
+    // duplicates + a mismatched "current directory" highlight).
+    const trimmed = directory?.trim()
+    const dir = trimmed ? stripTrailingSlash(trimmed) : undefined
     await get().updateConnection(active.id, { directory: dir })
     // Record in recents if it's a real directory
     if (dir) await get().addRecentDirectory(dir)
@@ -354,6 +358,9 @@ export const useConnections = create<ConnectionsState>((set, get) => ({
 
   addRecentDirectory: async (directory) => {
     const current = get().recentDirectories
+    // Normalize trailing slashes so the same dir entered as ".../x" and
+    // ".../x/" dedups to one recent-list entry instead of two.
+    directory = stripTrailingSlash(directory.trim())
     // Move to front, dedup, cap at MAX
     const updated = [directory, ...current.filter((d) => d !== directory)].slice(0, MAX_RECENT_DIRS)
     set({ recentDirectories: updated })