fix: CLI/UX batch — ChatConsole errors, curses scroll, skin-aware banner, git state banner (#5974)

* fix(cli): route error messages through ChatConsole inside patch_stdout

Cherry-pick of PR #5798 by @icn5381.

Replace self.console.print() with ChatConsole().print() for 11 error/status
messages reachable during the interactive session. Inside patch_stdout,
self.console (plain Rich Console) writes raw ANSI escapes that StdoutProxy
mangles into garbled text. ChatConsole uses prompt_toolkit's native
print_formatted_text which renders correctly.

Same class of bug as #2262 — that fix covered agent output but missed
these error paths in _ensure_runtime_credentials, _init_agent, quick
commands, skill loading, and plan mode.

* fix(model-picker): add scrolling viewport to curses provider menu

Cherry-pick of PR #5790 by @Lempkey. Fixes #5755.

_curses_prompt_choice rendered items starting unconditionally from index 0
with no scroll offset. The 'More providers' submenu has 13 entries. On
terminals shorter than ~16 rows, items past the fold were never drawn.
When UP-arrow wrapped cursor from 0 to the last item (Cancel, index 12),
the highlight rendered off-screen — appearing as if only Cancel existed.

Adds scroll_offset tracking that adjusts each frame to keep the cursor
inside the visible window.

* feat(cli): skin-aware compact banner + git state in startup banner

Combined salvage of PR #5922 by @ASRagab and PR #5877 by @xinbenlv.

Compact banner changes (from #5922):
- Read active skin colors and branding instead of hardcoding gold/NOUS HERMES
- Default skin preserves backward-compatible legacy branding
- Non-default skins use their own agent_name and colors

Git state in banner (from #5877):
- New format_banner_version_label() shows upstream/local git hashes
- Full banner title now includes git state (upstream hash, carried commits)
- Compact banner line2 shows the version label with git state
- Widen compact banner max width from 64 to 88 to fit version info

Both the full Rich banner and compact fallback are now skin-aware
and show git state.

hermes_cli/setup.py

@@ -421,10 +421,22 @@ def _curses_prompt_choice(question: str, choices: list, default: int = 0) -> int
                 curses.init_pair(1, curses.COLOR_GREEN, -1)
                 curses.init_pair(2, curses.COLOR_YELLOW, -1)
             cursor = default
+            scroll_offset = 0
 
             while True:
                 stdscr.clear()
                 max_y, max_x = stdscr.getmaxyx()
+
+                # Rows available for list items: rows 2..(max_y-2) inclusive.
+                visible = max(1, max_y - 3)
+
+                # Scroll the viewport so the cursor is always visible.
+                if cursor < scroll_offset:
+                    scroll_offset = cursor
+                elif cursor >= scroll_offset + visible:
+                    scroll_offset = cursor - visible + 1
+                scroll_offset = max(0, min(scroll_offset, max(0, len(choices) - visible)))
+
                 try:
                     stdscr.addnstr(
                         0,
@@ -436,12 +448,12 @@ def _curses_prompt_choice(question: str, choices: list, default: int = 0) -> int
                 except curses.error:
                     pass
 
-                for i, choice in enumerate(choices):
-                    y = i + 2
+                for row, i in enumerate(range(scroll_offset, min(scroll_offset + visible, len(choices)))):
+                    y = row + 2
                     if y >= max_y - 1:
                         break
                     arrow = "→" if i == cursor else " "
-                    line = f" {arrow}  {choice}"
+                    line = f" {arrow}  {choices[i]}"
                     attr = curses.A_NORMAL
                     if i == cursor:
                         attr = curses.A_BOLD