chore: fix 154 f-strings, simplify getattr/URL patterns, remove dead code (#3119)

Three categories of cleanup, all zero-behavioral-change:

1. F-strings without placeholders (154 fixes across 29 files)
   - Converted f'...' to '...' where no {expression} was present
   - Heaviest files: run_agent.py (24), cli.py (20), honcho_integration/cli.py (34)

2. Simplify defensive patterns in run_agent.py
   - Added explicit self._is_anthropic_oauth = False in __init__ (before
     the api_mode branch that conditionally sets it)
   - Replaced 7x getattr(self, '_is_anthropic_oauth', False) with direct
     self._is_anthropic_oauth (attribute always initialized now)
   - Added _is_openrouter_url() and _is_anthropic_url() helper methods
   - Replaced 3 inline 'openrouter' in self._base_url_lower checks

3. Remove dead code in small files
   - hermes_cli/claw.py: removed unused 'total' computation
   - tools/fuzzy_match.py: removed unused strip_indent() function and
     pattern_stripped variable

Full test suite: 6184 passed, 0 failures
E2E PTY: banner clean, tool calls work, zero garbled ANSI

hermes_cli/uninstall.py

@@ -273,7 +273,7 @@ def run_uninstall(args):
         log_info("No wrapper script found")
     
     # 4. Remove installation directory (code)
-    log_info(f"Removing installation directory...")
+    log_info("Removing installation directory...")
     
     # Check if we're running from within the install dir
     # We need to be careful here