fix: improve Gemini CLI workflow parameter handling

This commit addresses the "[object Object]" error by improving how
workflow parameters are handled:

1. Set default value 'latest' for gemini_cli_version to prevent
   undefined variable issues
2. Fix fromJSON() calls by using string 'false' instead of boolean
   false to prevent JSON parsing errors
3. Keep configuration checks to provide better error messages when
   API keys are missing

These changes ensure that optional parameters are properly handled
even when repository variables are not configured, preventing the
cryptic error that occurred in the previous workflow runs.

Author: claude

.github/workflows/gemini-invoke.yml

@@ -69,7 +69,7 @@ jobs:
           use_vertex_ai: '${{ vars.GOOGLE_GENAI_USE_VERTEXAI }}'
           google_api_key: '${{ secrets.GOOGLE_API_KEY }}'
           use_gemini_code_assist: '${{ vars.GOOGLE_GENAI_USE_GCA }}'
-          gemini_debug: '${{ fromJSON(vars.DEBUG || vars.ACTIONS_STEP_DEBUG || false) }}'
+          gemini_debug: '${{ fromJSON(vars.DEBUG || vars.ACTIONS_STEP_DEBUG || 'false') }}'
           gemini_model: '${{ vars.GEMINI_MODEL }}'
           settings: |-
             {

.github/workflows/gemini-review.yml

@@ -64,7 +64,7 @@ jobs:
           REPOSITORY: '${{ github.repository }}'
           ADDITIONAL_CONTEXT: '${{ inputs.additional_context }}'
         with:
-          gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION }}'
+          gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION || 'latest' }}'
           gcp_workload_identity_provider: '${{ vars.GCP_WIF_PROVIDER }}'
           gcp_project_id: '${{ vars.GOOGLE_CLOUD_PROJECT }}'
           gcp_location: '${{ vars.GOOGLE_CLOUD_LOCATION }}'
@@ -73,7 +73,7 @@ jobs:
           use_vertex_ai: '${{ vars.GOOGLE_GENAI_USE_VERTEXAI }}'
           google_api_key: '${{ secrets.GOOGLE_API_KEY }}'
           use_gemini_code_assist: '${{ vars.GOOGLE_GENAI_USE_GCA }}'
-          gemini_debug: '${{ fromJSON(vars.DEBUG || vars.ACTIONS_STEP_DEBUG || false) }}'
+          gemini_debug: '${{ fromJSON(vars.DEBUG || vars.ACTIONS_STEP_DEBUG || 'false') }}'
           settings: |-
             {
               "maxSessionTurns": 25,

.github/workflows/gemini-triage.yml

@@ -73,7 +73,7 @@ jobs:
           ISSUE_BODY: '${{ github.event.issue.body }}'
           AVAILABLE_LABELS: '${{ steps.get_labels.outputs.available_labels }}'
         with:
-          gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION }}'
+          gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION || 'latest' }}'
           gcp_workload_identity_provider: '${{ vars.GCP_WIF_PROVIDER }}'
           gcp_project_id: '${{ vars.GOOGLE_CLOUD_PROJECT }}'
           gcp_location: '${{ vars.GOOGLE_CLOUD_LOCATION }}'
@@ -82,7 +82,7 @@ jobs:
           use_vertex_ai: '${{ vars.GOOGLE_GENAI_USE_VERTEXAI }}'
           google_api_key: '${{ secrets.GOOGLE_API_KEY }}'
           use_gemini_code_assist: '${{ vars.GOOGLE_GENAI_USE_GCA }}'
-          gemini_debug: '${{ fromJSON(vars.DEBUG || vars.ACTIONS_STEP_DEBUG || false) }}'
+          gemini_debug: '${{ fromJSON(vars.DEBUG || vars.ACTIONS_STEP_DEBUG || 'false') }}'
           settings: |-
             {
               "maxSessionTurns": 25,