permission-mode control beside the Claude composer (T-275)

Build the T-275 picker on the new popover primitive (D-88): an icon-only,
per-mode-coloured button trailing the composer text box opens a ClideMenu of
the safe trio (default/acceptEdits/plan, active marked) plus a divided, disabled
bypass row (the footgun stays behind the cockpit guard, T-181). The label lives
in the tooltip, the menu, and the status bar — the resting button is the glyph
alone. Coexists with the composer's Stop row when busy.

- new permission_mode_control.dart (PermissionModeControl + per-mode
  icon/colour helpers); shieldCheck/shieldWarning glyphs added to PhosphorIcons.
- claude_composer.dart: permissionMode + onSetPermissionMode props; control
  trails the text box (bottom-aligned), shown only when wired.
- claude_pane.dart: pass the current mode + a setter; demote the status-bar
  _ModeBadge to a passive, per-mode-coloured text indicator (no click). Ctrl/Cmd+M
  still cycles (onCycleMode unchanged).

Regenerated the phosphor-glyphs reference (47 defined). Tests: menu opens with
the trio + disabled bypass, select sets the mode, helpers map colours/icons,
control coexists with Stop, hidden when no mode.

Note: claude_pane.dart also carries the earlier T-274 resume diagnostic log line
(uncommitted in the working tree, reviewed as benign) — it rides along here.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -18,6 +18,13 @@ heading, and (b) bumping `pubspec.yaml` `version:` in the same commit.
 
 ### Added
 
+- **Permission-mode control beside the Claude composer.** An icon-only,
+  per-mode-coloured button trails the composer text box; clicking it opens a
+  menu of the safe modes (default · accept-edits · plan, active one marked) with
+  `bypass` shown but disabled (it stays behind the cockpit guard). The label
+  appears on hover, in the menu, and in the status bar. The status-bar mode is
+  now a passive, colour-coded indicator (no click) — switching lives in the new
+  control and `Ctrl/Cmd+M`. Built on the new popover primitive (D-88). (T-275)
 - **Clickable T/D/Q/R cross-refs in the Claude conversation.** Bare ticket and
   governance references (`T-281`, `D-77`, `Q-5`, `R-2`) in rendered messages are
   now links: clicking one opens the record in its context-pane reader — `T-`