Make verbose diagnostics effective across hosted, browser, and auth commands

[rishabhraj36]

Parent: #171

Problem

-v/--verbose is documented as universal, but support is inconsistent and hosted adapter execution currently accepts the flag without using it.

Verified gaps:

• Hosted adapter parsing accepts -v, but dispatch drops parsed.verbose (src/hosted/runner.ts:269-307).
• The hosted client execution contract has no verbose field (src/hosted/client.ts:103-114).
• Browser leaves reject -v, although CDP diagnostics already read WEBCMD_VERBOSE (src/browser/cdp.ts:119-123, 354-359).
• auth status and auth refresh perform browser/daemon probes but reject -v.
• doctor already supports -v.

Scope

• Forward hosted adapter verbose mode and make its effect observable, or reject it instead of silently ignoring it.
• Expose/apply verbose mode for browser leaves that perform bridge/CDP I/O.
• Exclude filesystem-only browser init.
• Decide explicitly whether browser verify -v forwards to its adapter subprocess.
• Add verbose support to auth probes only if useful underlying diagnostics are wired through.
• Do not add no-op verbose flags to list-only, filesystem-only, completion, acknowledgement-only, or passthrough commands.

Acceptance criteria

• Hosted -v is effective or explicitly unsupported.
• Browser -v enables existing bridge/CDP diagnostics.
• Any auth -v support has observable diagnostics.
• No command advertises a no-op verbose flag.
• Local and hosted behavior is covered by tests.