Add Project Home, Auth Bridge, shared auth token, and Tier-1 polish

Project Home (DESIGN-REVIEW §B2): the project is promoted from a 280px
sidebar card to a first-class main-area view. ProjectCard.tsx (1,257
lines) is replaced by a select-only ProjectRow plus tabs for Overview,
Sessions, Automation, Config and Files. The PortMappings, FileManager
and ContainerProgress modals are absorbed rather than reimplemented.
Config gains a Saved/Saving/Failed indicator — save-on-blur failures
previously reached only console.error.

Tier-1 polish (DESIGN-REVIEW §A): new elevation, muted-accent, disabled
and focus-ring tokens; a global :focus-visible ring with every
focus:outline-none removed; filled buttons moved to --accent-emphasis
and white-on-success toggles retired, fixing three WCAG AA failures
(2.1:1, 2.5:1, 2.4:1); a shared Modal primitive with role="dialog",
focus trap and restore, adopted by all remaining modals; status
indicators that carry a glyph and word rather than colour alone.

Ctrl+Shift+W closes a tab, deliberately not Ctrl+W — that is readline's
kill-word, used constantly in the terminal this app is built around.

Auth Bridge: a general loopback-callback bridge so browser logins run
inside a container (aws sso login, Concourse fly login, claude login)
can complete against the host browser. Listeners are discovered from
/proc/net/tcp{,6} — ss/netstat/lsof are absent from the image — bound on
host 127.0.0.1 only, and tunnelled in over the Docker API via socat,
which keeps working on Docker Desktop where container IPs are not
routable. Falls back to [::1] because Node resolves localhost to IPv6
first, so claude login often binds ::1 alone. Opt-in per project.

This extracts create_attached_exec() and moves the existing terminal
session path onto it, so there is one attached-exec implementation
rather than two.

Shared auth token: `claude setup-token` is run in a container, the token
is stored in the OS keychain and injected as CLAUDE_CODE_OAUTH_TOKEN
into Anthropic-backend projects. Contrary to the initial design note,
setup-token uses an Anthropic-hosted redirect and blocks on a stdin
paste prompt rather than a loopback callback, so a stdin command is
required for the flow to complete.

The token is never logged, never returned to the frontend, and is
redacted from the streamed output with a stateful matcher that withholds
any tail that could still grow into a secret. Change detection uses a
random rotation id rather than a hash, since a hash in a docker-inspect
readable label would be an offline verification oracle.

Frontend 33 -> 51 tests; Rust 34 tests. Both builds clean.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

app/src-tauri/src/storage/secure.rs

@@ -1,3 +1,31 @@
+//! OS keychain access, via the `keyring` crate.
+//!
+//! Two kinds of secret live here:
+//!   * **per-project** secrets (git token, AWS keys, …), keyed by project id;
+//!   * the **shared Claude Code OAuth token**, which is global — one
+//!     `claude setup-token` run authenticates every Anthropic-backend project.
+//!
+//! Nothing in this module ever logs a secret or folds one into an error string.
+
+/// Keychain service for the single, global Claude Code OAuth token minted by
+/// `claude setup-token` and consumed via `CLAUDE_CODE_OAUTH_TOKEN`.
+const CLAUDE_TOKEN_SERVICE: &str = "triple-c-claude-oauth-token";
+
+/// Keychain service for the token's **rotation id** — a fresh random value
+/// written every time the token is stored.
+///
+/// Container recreation is driven off Docker labels, which anything on the host
+/// can read with `docker inspect`. The token itself must obviously not go in a
+/// label, and neither should a bare hash of it: a hash is a verification oracle
+/// (holding a candidate token, you could confirm it). This id is not derived
+/// from the token at all — it is unrelated random data that merely *changes*
+/// whenever the token does, which is exactly (and only) what change detection
+/// needs.
+const CLAUDE_TOKEN_VERSION_SERVICE: &str = "triple-c-claude-oauth-token-version";
+
+/// Fixed account name used for every triple-c keychain entry.
+const KEYCHAIN_ACCOUNT: &str = "secret";
+
 /// Store a per-project secret in the OS keychain.
 pub fn store_project_secret(project_id: &str, key_name: &str, value: &str) -> Result<(), String> {
     let service = format!("triple-c-project-{}-{}", project_id, key_name);
@@ -43,3 +71,88 @@ pub fn delete_project_secrets(project_id: &str) -> Result<(), String> {
     }
     Ok(())
 }
+
+// ─────────────────────────────────────────────────────────────────────────────
+// Shared Claude Code OAuth token (global, not per project)
+// ─────────────────────────────────────────────────────────────────────────────
+
+/// Read a single-value keychain entry. `Ok(None)` when the entry is absent.
+/// The error text names the entry, never its value.
+fn read_entry(service: &str, label: &str) -> Result<Option<String>, String> {
+    let entry = keyring::Entry::new(service, KEYCHAIN_ACCOUNT)
+        .map_err(|e| format!("Keyring error: {}", e))?;
+    match entry.get_password() {
+        Ok(value) => Ok(Some(value)),
+        Err(keyring::Error::NoEntry) => Ok(None),
+        Err(e) => Err(format!("Failed to retrieve {}: {}", label, e)),
+    }
+}
+
+/// Delete a keychain entry, treating "wasn't there" as success.
+fn delete_entry(service: &str, label: &str) -> Result<(), String> {
+    let entry = keyring::Entry::new(service, KEYCHAIN_ACCOUNT)
+        .map_err(|e| format!("Keyring error: {}", e))?;
+    match entry.delete_credential() {
+        Ok(()) | Err(keyring::Error::NoEntry) => Ok(()),
+        Err(e) => Err(format!("Failed to delete {}: {}", label, e)),
+    }
+}
+
+/// Store the shared Claude Code OAuth token, replacing any previous one, and
+/// mint a fresh rotation id so containers holding the old token are flagged for
+/// recreation. Blank input is rejected rather than silently stored.
+pub fn store_claude_oauth_token(token: &str) -> Result<(), String> {
+    if token.trim().is_empty() {
+        return Err("Refusing to store an empty Claude authentication token.".to_string());
+    }
+
+    let entry = keyring::Entry::new(CLAUDE_TOKEN_SERVICE, KEYCHAIN_ACCOUNT)
+        .map_err(|e| format!("Keyring error: {}", e))?;
+    entry
+        .set_password(token)
+        .map_err(|e| format!("Failed to store the Claude authentication token: {}", e))?;
+
+    // Rotation id second: if this fails the token is still usable, and the
+    // stale id only costs one extra container recreation later.
+    let version = uuid::Uuid::new_v4().to_string();
+    let version_entry = keyring::Entry::new(CLAUDE_TOKEN_VERSION_SERVICE, KEYCHAIN_ACCOUNT)
+        .map_err(|e| format!("Keyring error: {}", e))?;
+    version_entry
+        .set_password(&version)
+        .map_err(|e| format!("Failed to store the Claude token rotation id: {}", e))?;
+
+    Ok(())
+}
+
+/// Retrieve the shared Claude Code OAuth token, if one has been stored.
+pub fn get_claude_oauth_token() -> Result<Option<String>, String> {
+    read_entry(CLAUDE_TOKEN_SERVICE, "the Claude authentication token")
+}
+
+/// The rotation id of the currently stored token. Opaque random data — safe to
+/// put in a Docker label, unlike the token or any hash of it.
+pub fn get_claude_oauth_token_version() -> Result<Option<String>, String> {
+    read_entry(
+        CLAUDE_TOKEN_VERSION_SERVICE,
+        "the Claude token rotation id",
+    )
+}
+
+/// Whether a shared Claude Code OAuth token is currently stored. A keychain
+/// failure is reported as "no token" rather than surfacing as an error, so the
+/// UI degrades to the un-authenticated state instead of breaking.
+pub fn has_claude_oauth_token() -> bool {
+    matches!(get_claude_oauth_token(), Ok(Some(t)) if !t.trim().is_empty())
+}
+
+/// Delete the shared Claude Code OAuth token and its rotation id. Both are
+/// attempted even if the first fails, so a partial failure cannot strand the
+/// token behind a deleted id.
+pub fn delete_claude_oauth_token() -> Result<(), String> {
+    let token_result = delete_entry(CLAUDE_TOKEN_SERVICE, "the Claude authentication token");
+    let version_result = delete_entry(
+        CLAUDE_TOKEN_VERSION_SERVICE,
+        "the Claude token rotation id",
+    );
+    token_result.and(version_result)
+}