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/components/projects/ClaudeInstructionsModal.tsx

@@ -1,4 +1,6 @@
-import { useState, useEffect, useRef, useCallback } from "react";
+import Modal from "../ui/Modal";
+import Button from "../ui/Button";
+import ClaudeInstructionsEditor from "./ClaudeInstructionsEditor";
 
 interface Props {
   instructions: string;
@@ -7,74 +9,35 @@ interface Props {
   onClose: () => void;
 }
 
-export default function ClaudeInstructionsModal({ instructions: initial, disabled, onSave, onClose }: Props) {
-  const [instructions, setInstructions] = useState(initial);
-  const overlayRef = useRef<HTMLDivElement>(null);
-  const textareaRef = useRef<HTMLTextAreaElement>(null);
-
-  useEffect(() => {
-    textareaRef.current?.focus();
-  }, []);
-
-  useEffect(() => {
-    const handleKeyDown = (e: KeyboardEvent) => {
-      if (e.key === "Escape") onClose();
-    };
-    document.addEventListener("keydown", handleKeyDown);
-    return () => document.removeEventListener("keydown", handleKeyDown);
-  }, [onClose]);
-
-  const handleOverlayClick = useCallback(
-    (e: React.MouseEvent<HTMLDivElement>) => {
-      if (e.target === overlayRef.current) onClose();
-    },
-    [onClose],
-  );
-
-  const handleBlur = async () => {
-    try { await onSave(instructions); } catch (err) {
-      console.error("Failed to update Claude instructions:", err);
-    }
-  };
-
+/** Global Claude instructions (Settings). Per-project lives in Config → Runtime. */
+export default function ClaudeInstructionsModal({
+  instructions,
+  disabled,
+  onSave,
+  onClose,
+}: Props) {
   return (
-    <div
-      ref={overlayRef}
-      onClick={handleOverlayClick}
-      className="fixed inset-0 bg-black/50 flex items-center justify-center z-50"
+    <Modal
+      title="Claude Instructions"
+      description="Written to ~/.claude/CLAUDE.md inside containers."
+      onClose={onClose}
+      widthClassName="w-[40rem]"
+      footer={<Button onClick={onClose}>Close</Button>}
     >
-      <div className="bg-[var(--bg-secondary)] border border-[var(--border-color)] rounded-lg p-6 w-[40rem] shadow-xl max-h-[80vh] flex flex-col">
-        <h2 className="text-lg font-semibold mb-1">Claude Instructions</h2>
-        <p className="text-xs text-[var(--text-secondary)] mb-4">
-          Per-project instructions for Claude Code (written to ~/.claude/CLAUDE.md in container)
-        </p>
-
-        {disabled && (
-          <div className="px-2 py-1.5 mb-3 bg-[var(--warning)]/15 border border-[var(--warning)]/30 rounded text-xs text-[var(--warning)]">
-            Container must be stopped to change Claude instructions.
-          </div>
-        )}
-
-        <textarea
-          ref={textareaRef}
-          value={instructions}
-          onChange={(e) => setInstructions(e.target.value)}
-          onBlur={handleBlur}
-          placeholder="Enter instructions for Claude Code in this project's container..."
-          disabled={disabled}
-          rows={14}
-          className="w-full flex-1 px-3 py-2 bg-[var(--bg-primary)] border border-[var(--border-color)] rounded text-sm text-[var(--text-primary)] focus:outline-none focus:border-[var(--accent)] disabled:opacity-50 resize-y font-mono"
-        />
-
-        <div className="flex justify-end mt-4">
-          <button
-            onClick={onClose}
-            className="px-4 py-2 text-sm text-[var(--text-secondary)] hover:text-[var(--text-primary)] transition-colors"
-          >
-            Close
-          </button>
-        </div>
-      </div>
-    </div>
+      <ClaudeInstructionsEditor
+        instructions={instructions}
+        disabled={disabled}
+        disabledReason="Container must be stopped to change Claude instructions."
+        rows={14}
+        autoFocus
+        onSave={async (value) => {
+          try {
+            await onSave(value);
+          } catch (err) {
+            console.error("Failed to update Claude instructions:", err);
+          }
+        }}
+      />
+    </Modal>
   );
 }